Search for a new gauge boson in π 0 decays
Identifieur interne : 000A99 ( Istex/Corpus ); précédent : 000A98; suivant : 000B00Search for a new gauge boson in π 0 decays
Auteurs : J. Altegoer ; P. Astier ; D. Autiero ; A. Baldisseri ; M. Baldo-Ceolin ; G. Ballocchi ; M. Banner ; S. Basa ; G. Bassompierre ; K. Benslama ; N. Besson ; I. Bird ; B. Blumenfeld ; F. Bobisut ; J. Bouchez ; S. Boyd ; A. Bueno ; S. Bunyatov ; L. Camilleri ; A. Cardini ; A. Castera ; P. W. Cattaneo ; V. Cavasinni ; A. Cervera-Villanueva ; G. M. Collazuol ; G. Conforto ; C. Conta ; M. Contalbrigo ; R. Cousins ; D. Daniels ; A. De Santo ; T. Del Prete ; T. Dignan ; L. Di Lella ; E. Do Couto E Silva ; I. J. Donnelly ; J. Dumarchez ; T. Fazio ; G. J. Feldman ; R. Ferrari ; D. Ferrère ; V. Flaminio ; M. Fraternali ; J-M. Gaillard ; P. Galumian ; E. Gangler ; A. Geiser ; D. Geppert ; D. Gibin ; S. N. Gninenko ; J-J. Gomez-Cadenas ; J. Gosset ; C. Gö Ling ; M. Gouanère ; A. Grant ; G. Graziani ; A. Guglielmi ; C. Hagner ; J. Hernando ; D. Hubbard ; P. Hurst ; N. Hyett ; E. Iacopini ; C. Joseph ; D. Kekez ; B. Khomenko ; M. M. Kirsanov ; O. Klimov ; J. Kokkonen ; A. V. Kovzelev ; V. Kuznetsov ; S. Lacaprara ; A. Lanza ; L. La Rotonda ; M. Laveder ; A. Letessier-Selvon ; J-M. Levy ; L. Linssen ; A. Ljubi I ; J. Long ; A. Lupi ; E. Manola-Poggioli ; A. Marchionni ; F. Martelli ; X. Méchain ; J-P. Mendiburu ; J-P. Meyer ; M. Mezzetto ; S. R. Mishra ; G. F. Moorhead ; L. Mossuz ; P. Nédélec ; Yu. Nefedov ; C. Nguyen-Mau ; D. Orestano ; F. Pastore ; L. S. Peak ; E. Pennacchio ; J-P. Perroud ; H. Pessard ; R. Petti ; A. Placci ; H. Plothow-Besch ; A. Pluquet ; G. Polesello ; D. Pollmann ; B. G. Pope ; B. Popov ; C. Poulsen ; P. Rathouit ; C. Roda ; A. Rubbia ; F. Salvatore ; D. Scannicchio ; K. Schahmaneche ; B. Schmidt ; A. Sconza ; M. Serrano ; M. E. Sevior ; D. Sillou ; F. J. P. Soler ; G. Sozzi ; D. Steele ; P. Steffen ; M. Steininger ; U. Stiegler ; M. Stip Evi ; T. Stolarczyk ; M. Tareb-Reyes ; G. N. Taylor ; S. Tereshchenko ; A. N. Toropin ; A-M. Touchard ; S. N. Tovey ; M-T. Tran ; E. Tsesmelis ; J. Ulrichs ; V. Uros ; M. Valdata-Nappi ; V. Valuev ; F. Vannucci ; K. E. Varvell ; M. Veltri ; V. Vercesi ; D. Verkindt ; J-M. Vieira ; T. Vinogradova ; M-K. Vo ; S. A. Volkov ; F. Weber ; T. Weisse ; M. Werlen ; F. Wilson ; L. J. Winton ; B. D. Yabsley ; H. Zaccone ; K. ZuberSource :
- Physics Letters B [ 0370-2693 ] ; 1998.
English descriptors
- KwdEn :
- Altegoer, Background events, Boson, Boson flux, Candidate events, Cern, Computer physics commun, Crystal barrel collaboration, Data sample, Detector, Drift chambers, Ecal, Electromagnetic, Electromagnetic shower, Elsevier science, Energetic cluster, Energy spectrum, External coulomb field, Gauge boson, Hcal, Light gauge boson, Mass region, Meijer drees, Monte carlo, Muon, Muon chambers, Neutral pions, Neutrino, Neutrino events, Neutrino interactions, Neutrino target, Nomad, Nomad collaboration, Nomad detector, Nucl, Nuclear research, Phys, Physics letters, Preshower detector, Primakoff effect, Same reconstruction program, Selection criteria, Shower energy, Significant activity, Simulation, Total number, Upper limit.
- Teeft :
- Altegoer, Background events, Boson, Boson flux, Candidate events, Cern, Computer physics commun, Crystal barrel collaboration, Data sample, Detector, Drift chambers, Ecal, Electromagnetic, Electromagnetic shower, Elsevier science, Energetic cluster, Energy spectrum, External coulomb field, Gauge boson, Hcal, Light gauge boson, Mass region, Meijer drees, Monte carlo, Muon, Muon chambers, Neutral pions, Neutrino, Neutrino events, Neutrino interactions, Neutrino target, Nomad, Nomad collaboration, Nomad detector, Nucl, Nuclear research, Phys, Physics letters, Preshower detector, Primakoff effect, Same reconstruction program, Selection criteria, Shower energy, Significant activity, Simulation, Total number, Upper limit.
Abstract
Abstract: A search was made for a new light gauge boson X which might be produced in π0→γ+X decay from neutral pions generated by 450 GeV protons in the CERN SPS neutrino target. The X's would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect, in the process of X→π0 conversion in the external Coulomb field of a nucleus. With 1.45×1018 protons on target, 20 candidate events with energy between 8 and 140 GeV were found from the analysis of neutrino data. This number is in agreement with the expectation of 18.1±2.8 background events from standard neutrino processes. A new 90 %C.L. upper limit on the branching ratio Br(π0→γ+X)< (3.3 to 1.9)×10−5 for X masses ranging from 0 to 120 MeV/c2 is obtained.
Url:
DOI: 10.1016/S0370-2693(98)00402-X
Links to Exploration step
ISTEX:3AD7310F741D3D1C2FF099745D79C94F53C93238Le document en format XML
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Baldisseri</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Baldo Ceolin, M" sort="Baldo Ceolin, M" uniqKey="Baldo Ceolin M" first="M." last="Baldo-Ceolin">M. Baldo-Ceolin</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Ballocchi, G" sort="Ballocchi, G" uniqKey="Ballocchi G" first="G." last="Ballocchi">G. Ballocchi</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Banner, M" sort="Banner, M" uniqKey="Banner M" first="M." last="Banner">M. Banner</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Basa, S" sort="Basa, S" uniqKey="Basa S" first="S." last="Basa">S. Basa</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Bassompierre, G" sort="Bassompierre, G" uniqKey="Bassompierre G" first="G." last="Bassompierre">G. Bassompierre</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Benslama, K" sort="Benslama, K" uniqKey="Benslama K" first="K." last="Benslama">K. Benslama</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Besson, N" sort="Besson, N" uniqKey="Besson N" first="N." last="Besson">N. Besson</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Bird, I" sort="Bird, I" uniqKey="Bird I" first="I." last="Bird">I. Bird</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Blumenfeld, B" sort="Blumenfeld, B" uniqKey="Blumenfeld B" first="B." last="Blumenfeld">B. Blumenfeld</name><affiliation><mods:affiliation>Johns Hopkins Univ., Baltimore, MD, USA</mods:affiliation></affiliation></author><author><name sortKey="Bobisut, F" sort="Bobisut, F" uniqKey="Bobisut F" first="F." last="Bobisut">F. Bobisut</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Bouchez, J" sort="Bouchez, J" uniqKey="Bouchez J" first="J." last="Bouchez">J. Bouchez</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Boyd, S" sort="Boyd, S" uniqKey="Boyd S" first="S." last="Boyd">S. Boyd</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation></author><author><name sortKey="Bueno, A" sort="Bueno, A" uniqKey="Bueno A" first="A." last="Bueno">A. Bueno</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Bunyatov, S" sort="Bunyatov, S" uniqKey="Bunyatov S" first="S." last="Bunyatov">S. Bunyatov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Camilleri, L" sort="Camilleri, L" uniqKey="Camilleri L" first="L." last="Camilleri">L. Camilleri</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Cardini, A" sort="Cardini, A" uniqKey="Cardini A" first="A." last="Cardini">A. Cardini</name><affiliation><mods:affiliation>UCLA, Los Angeles, CA, USA</mods:affiliation></affiliation></author><author><name sortKey="Castera, A" sort="Castera, A" uniqKey="Castera A" first="A." last="Castera">A. Castera</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Cattaneo, P W" sort="Cattaneo, P W" uniqKey="Cattaneo P" first="P. W." last="Cattaneo">P. W. Cattaneo</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Cavasinni, V" sort="Cavasinni, V" uniqKey="Cavasinni V" first="V." last="Cavasinni">V. Cavasinni</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Cervera Villanueva, A" sort="Cervera Villanueva, A" uniqKey="Cervera Villanueva A" first="A." last="Cervera-Villanueva">A. Cervera-Villanueva</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Collazuol, G M" sort="Collazuol, G M" uniqKey="Collazuol G" first="G. M." last="Collazuol">G. M. Collazuol</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Conforto, G" sort="Conforto, G" uniqKey="Conforto G" first="G." last="Conforto">G. Conforto</name><affiliation><mods:affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Conta, C" sort="Conta, C" uniqKey="Conta C" first="C." last="Conta">C. Conta</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Contalbrigo, M" sort="Contalbrigo, M" uniqKey="Contalbrigo M" first="M." last="Contalbrigo">M. Contalbrigo</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Cousins, R" sort="Cousins, R" uniqKey="Cousins R" first="R." last="Cousins">R. Cousins</name><affiliation><mods:affiliation>UCLA, Los Angeles, CA, USA</mods:affiliation></affiliation></author><author><name sortKey="Daniels, D" sort="Daniels, D" uniqKey="Daniels D" first="D." last="Daniels">D. Daniels</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Santo, A De" sort="Santo, A De" uniqKey="Santo A" first="A. De" last="Santo">A. De Santo</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Prete, T Del" sort="Prete, T Del" uniqKey="Prete T" first="T. Del" last="Prete">T. Del Prete</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Dignan, T" sort="Dignan, T" uniqKey="Dignan T" first="T." last="Dignan">T. Dignan</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Lella, L Di" sort="Lella, L Di" uniqKey="Lella L" first="L. Di" last="Lella">L. Di Lella</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Do Couto E Silva, E" sort="Do Couto E Silva, E" uniqKey="Do Couto E Silva E" first="E." last="Do Couto E Silva">E. Do Couto E Silva</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Donnelly, I J" sort="Donnelly, I J" uniqKey="Donnelly I" first="I. J." last="Donnelly">I. J. Donnelly</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation><affiliation><mods:affiliation>ANSTO,Sydney, Menai, Australia</mods:affiliation></affiliation></author><author><name sortKey="Dumarchez, J" sort="Dumarchez, J" uniqKey="Dumarchez J" first="J." last="Dumarchez">J. Dumarchez</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Fazio, T" sort="Fazio, T" uniqKey="Fazio T" first="T." last="Fazio">T. Fazio</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Feldman, G J" sort="Feldman, G J" uniqKey="Feldman G" first="G. J." last="Feldman">G. J. Feldman</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Ferrari, R" sort="Ferrari, R" uniqKey="Ferrari R" first="R." last="Ferrari">R. Ferrari</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Ferrere, D" sort="Ferrere, D" uniqKey="Ferrere D" first="D." last="Ferrère">D. Ferrère</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Flaminio, V" sort="Flaminio, V" uniqKey="Flaminio V" first="V." last="Flaminio">V. Flaminio</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Fraternali, M" sort="Fraternali, M" uniqKey="Fraternali M" first="M." last="Fraternali">M. Fraternali</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Gaillard, J M" sort="Gaillard, J M" uniqKey="Gaillard J" first="J-M." last="Gaillard">J-M. Gaillard</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Galumian, P" sort="Galumian, P" uniqKey="Galumian P" first="P." last="Galumian">P. Galumian</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Gangler, E" sort="Gangler, E" uniqKey="Gangler E" first="E." last="Gangler">E. Gangler</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Geiser, A" sort="Geiser, A" uniqKey="Geiser A" first="A." last="Geiser">A. Geiser</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Geppert, D" sort="Geppert, D" uniqKey="Geppert D" first="D." last="Geppert">D. Geppert</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Gibin, D" sort="Gibin, D" uniqKey="Gibin D" first="D." last="Gibin">D. Gibin</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Gninenko, S N" sort="Gninenko, S N" uniqKey="Gninenko S" first="S. N." last="Gninenko">S. N. Gninenko</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Gomez Cadenas, J J" sort="Gomez Cadenas, J J" uniqKey="Gomez Cadenas J" first="J-J." last="Gomez-Cadenas">J-J. Gomez-Cadenas</name><affiliation><mods:affiliation>Univ. of Massachusetts, Amherst, MA, USA</mods:affiliation></affiliation><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Gosset, J" sort="Gosset, J" uniqKey="Gosset J" first="J." last="Gosset">J. Gosset</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Go Ling, C" sort="Go Ling, C" uniqKey="Go Ling C" first="C." last="Gö Ling">C. Gö Ling</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Gouanere, M" sort="Gouanere, M" uniqKey="Gouanere M" first="M." last="Gouanère">M. Gouanère</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Grant, A" sort="Grant, A" uniqKey="Grant A" first="A." last="Grant">A. Grant</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Graziani, G" sort="Graziani, G" uniqKey="Graziani G" first="G." last="Graziani">G. Graziani</name><affiliation><mods:affiliation>Univ. of Florence and INFN, Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Guglielmi, A" sort="Guglielmi, A" uniqKey="Guglielmi A" first="A." last="Guglielmi">A. Guglielmi</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Hagner, C" sort="Hagner, C" uniqKey="Hagner C" first="C." last="Hagner">C. Hagner</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Hernando, J" sort="Hernando, J" uniqKey="Hernando J" first="J." last="Hernando">J. Hernando</name><affiliation><mods:affiliation>Univ. of Massachusetts, Amherst, MA, USA</mods:affiliation></affiliation><affiliation><mods:affiliation>1 Now at UCSC, Santa Cruz, CA, USA.</mods:affiliation></affiliation></author><author><name sortKey="Hubbard, D" sort="Hubbard, D" uniqKey="Hubbard D" first="D." last="Hubbard">D. Hubbard</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Hurst, P" sort="Hurst, P" uniqKey="Hurst P" first="P." last="Hurst">P. Hurst</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Hyett, N" sort="Hyett, N" uniqKey="Hyett N" first="N." last="Hyett">N. Hyett</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Iacopini, E" sort="Iacopini, E" uniqKey="Iacopini E" first="E." last="Iacopini">E. Iacopini</name><affiliation><mods:affiliation>Univ. of Florence and INFN, Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Joseph, C" sort="Joseph, C" uniqKey="Joseph C" first="C." last="Joseph">C. Joseph</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Kekez, D" sort="Kekez, D" uniqKey="Kekez D" first="D." last="Kekez">D. Kekez</name><affiliation><mods:affiliation>Rudjer Bošković Institute, Zagreb, Croatia</mods:affiliation></affiliation></author><author><name sortKey="Khomenko, B" sort="Khomenko, B" uniqKey="Khomenko B" first="B." last="Khomenko">B. Khomenko</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Kirsanov, M M" sort="Kirsanov, M M" uniqKey="Kirsanov M" first="M. M." last="Kirsanov">M. M. Kirsanov</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Klimov, O" sort="Klimov, O" uniqKey="Klimov O" first="O." last="Klimov">O. Klimov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Kokkonen, J" sort="Kokkonen, J" uniqKey="Kokkonen J" first="J." last="Kokkonen">J. Kokkonen</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Kovzelev, A V" sort="Kovzelev, A V" uniqKey="Kovzelev A" first="A. V." last="Kovzelev">A. V. Kovzelev</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Kuznetsov, V" sort="Kuznetsov, V" uniqKey="Kuznetsov V" first="V." last="Kuznetsov">V. Kuznetsov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Lacaprara, S" sort="Lacaprara, S" uniqKey="Lacaprara S" first="S." last="Lacaprara">S. Lacaprara</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Lanza, A" sort="Lanza, A" uniqKey="Lanza A" first="A." last="Lanza">A. Lanza</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="La Rotonda, L" sort="La Rotonda, L" uniqKey="La Rotonda L" first="L." last="La Rotonda">L. La Rotonda</name><affiliation><mods:affiliation>Univ. of Calabria and INFN, Cosenza, Italy</mods:affiliation></affiliation></author><author><name sortKey="Laveder, M" sort="Laveder, M" uniqKey="Laveder M" first="M." last="Laveder">M. Laveder</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Letessier Selvon, A" sort="Letessier Selvon, A" uniqKey="Letessier Selvon A" first="A." last="Letessier-Selvon">A. Letessier-Selvon</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Levy, J M" sort="Levy, J M" uniqKey="Levy J" first="J-M." last="Levy">J-M. Levy</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Linssen, L" sort="Linssen, L" uniqKey="Linssen L" first="L." last="Linssen">L. Linssen</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Ljubi I, A" sort="Ljubi I, A" uniqKey="Ljubi I A" first="A." last="Ljubi I">A. Ljubi I</name><affiliation><mods:affiliation>Rudjer Bošković Institute, Zagreb, Croatia</mods:affiliation></affiliation></author><author><name sortKey="Long, J" sort="Long, J" uniqKey="Long J" first="J." last="Long">J. Long</name><affiliation><mods:affiliation>Johns Hopkins Univ., Baltimore, MD, USA</mods:affiliation></affiliation><affiliation><mods:affiliation>2 Now at Univ. of Colorado, Boulder, CO, USA.</mods:affiliation></affiliation></author><author><name sortKey="Lupi, A" sort="Lupi, A" uniqKey="Lupi A" first="A." last="Lupi">A. Lupi</name><affiliation><mods:affiliation>Univ. of Florence and INFN, Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Manola Poggioli, E" sort="Manola Poggioli, E" uniqKey="Manola Poggioli E" first="E." last="Manola-Poggioli">E. Manola-Poggioli</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Marchionni, A" sort="Marchionni, A" uniqKey="Marchionni A" first="A." last="Marchionni">A. Marchionni</name><affiliation><mods:affiliation>Univ. of Florence and INFN, Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Martelli, F" sort="Martelli, F" uniqKey="Martelli F" first="F." last="Martelli">F. Martelli</name><affiliation><mods:affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Mechain, X" sort="Mechain, X" uniqKey="Mechain X" first="X." last="Méchain">X. Méchain</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Mendiburu, J P" sort="Mendiburu, J P" uniqKey="Mendiburu J" first="J-P." last="Mendiburu">J-P. Mendiburu</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Meyer, J P" sort="Meyer, J P" uniqKey="Meyer J" first="J-P." last="Meyer">J-P. Meyer</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Mezzetto, M" sort="Mezzetto, M" uniqKey="Mezzetto M" first="M." last="Mezzetto">M. Mezzetto</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Mishra, S R" sort="Mishra, S R" uniqKey="Mishra S" first="S. R." last="Mishra">S. R. Mishra</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Moorhead, G F" sort="Moorhead, G F" uniqKey="Moorhead G" first="G. F." last="Moorhead">G. F. Moorhead</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Mossuz, L" sort="Mossuz, L" uniqKey="Mossuz L" first="L." last="Mossuz">L. Mossuz</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Nedelec, P" sort="Nedelec, P" uniqKey="Nedelec P" first="P." last="Nédélec">P. Nédélec</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Nefedov, Yu" sort="Nefedov, Yu" uniqKey="Nefedov Y" first="Yu." last="Nefedov">Yu. Nefedov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Nguyen Mau, C" sort="Nguyen Mau, C" uniqKey="Nguyen Mau C" first="C." last="Nguyen-Mau">C. Nguyen-Mau</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Orestano, D" sort="Orestano, D" uniqKey="Orestano D" first="D." last="Orestano">D. Orestano</name><affiliation><mods:affiliation>Roma-III Univ., Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Pastore, F" sort="Pastore, F" uniqKey="Pastore F" first="F." last="Pastore">F. Pastore</name><affiliation><mods:affiliation>Roma-III Univ., Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Peak, L S" sort="Peak, L S" uniqKey="Peak L" first="L. S." last="Peak">L. S. Peak</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation></author><author><name sortKey="Pennacchio, E" sort="Pennacchio, E" uniqKey="Pennacchio E" first="E." last="Pennacchio">E. Pennacchio</name><affiliation><mods:affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Perroud, J P" sort="Perroud, J P" uniqKey="Perroud J" first="J-P." last="Perroud">J-P. Perroud</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Pessard, H" sort="Pessard, H" uniqKey="Pessard H" first="H." last="Pessard">H. Pessard</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Petti, R" sort="Petti, R" uniqKey="Petti R" first="R." last="Petti">R. Petti</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Placci, A" sort="Placci, A" uniqKey="Placci A" first="A." last="Placci">A. Placci</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Plothow Besch, H" sort="Plothow Besch, H" uniqKey="Plothow Besch H" first="H." last="Plothow-Besch">H. Plothow-Besch</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Pluquet, A" sort="Pluquet, A" uniqKey="Pluquet A" first="A." last="Pluquet">A. Pluquet</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Polesello, G" sort="Polesello, G" uniqKey="Polesello G" first="G." last="Polesello">G. Polesello</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Pollmann, D" sort="Pollmann, D" uniqKey="Pollmann D" first="D." last="Pollmann">D. Pollmann</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Pope, B G" sort="Pope, B G" uniqKey="Pope B" first="B. G." last="Pope">B. G. Pope</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Popov, B" sort="Popov, B" uniqKey="Popov B" first="B." last="Popov">B. Popov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Poulsen, C" sort="Poulsen, C" uniqKey="Poulsen C" first="C." last="Poulsen">C. Poulsen</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Rathouit, P" sort="Rathouit, P" uniqKey="Rathouit P" first="P." last="Rathouit">P. Rathouit</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Roda, C" sort="Roda, C" uniqKey="Roda C" first="C." last="Roda">C. Roda</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Rubbia, A" sort="Rubbia, A" uniqKey="Rubbia A" first="A." last="Rubbia">A. Rubbia</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Salvatore, F" sort="Salvatore, F" uniqKey="Salvatore F" first="F." last="Salvatore">F. Salvatore</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Scannicchio, D" sort="Scannicchio, D" uniqKey="Scannicchio D" first="D." last="Scannicchio">D. Scannicchio</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Schahmaneche, K" sort="Schahmaneche, K" uniqKey="Schahmaneche K" first="K." last="Schahmaneche">K. Schahmaneche</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Schmidt, B" sort="Schmidt, B" uniqKey="Schmidt B" first="B." last="Schmidt">B. Schmidt</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Sconza, A" sort="Sconza, A" uniqKey="Sconza A" first="A." last="Sconza">A. Sconza</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Serrano, M" sort="Serrano, M" uniqKey="Serrano M" first="M." last="Serrano">M. Serrano</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Sevior, M E" sort="Sevior, M E" uniqKey="Sevior M" first="M. E." last="Sevior">M. E. Sevior</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Sillou, D" sort="Sillou, D" uniqKey="Sillou D" first="D." last="Sillou">D. Sillou</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Soler, F J P" sort="Soler, F J P" uniqKey="Soler F" first="F. J. P." last="Soler">F. J. P. Soler</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation></author><author><name sortKey="Sozzi, G" sort="Sozzi, G" uniqKey="Sozzi G" first="G." last="Sozzi">G. Sozzi</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Steele, D" sort="Steele, D" uniqKey="Steele D" first="D." last="Steele">D. Steele</name><affiliation><mods:affiliation>Johns Hopkins Univ., Baltimore, MD, USA</mods:affiliation></affiliation><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Steffen, P" sort="Steffen, P" uniqKey="Steffen P" first="P." last="Steffen">P. Steffen</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Steininger, M" sort="Steininger, M" uniqKey="Steininger M" first="M." last="Steininger">M. Steininger</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Stiegler, U" sort="Stiegler, U" uniqKey="Stiegler U" first="U." last="Stiegler">U. Stiegler</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Stip Evi, M" sort="Stip Evi, M" uniqKey="Stip Evi M" first="M." last="Stip Evi">M. Stip Evi</name><affiliation><mods:affiliation>Rudjer Bošković Institute, Zagreb, Croatia</mods:affiliation></affiliation></author><author><name sortKey="Stolarczyk, T" sort="Stolarczyk, T" uniqKey="Stolarczyk T" first="T." last="Stolarczyk">T. Stolarczyk</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Tareb Reyes, M" sort="Tareb Reyes, M" uniqKey="Tareb Reyes M" first="M." last="Tareb-Reyes">M. Tareb-Reyes</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Taylor, G N" sort="Taylor, G N" uniqKey="Taylor G" first="G. N." last="Taylor">G. N. Taylor</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Tereshchenko, S" sort="Tereshchenko, S" uniqKey="Tereshchenko S" first="S." last="Tereshchenko">S. Tereshchenko</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Toropin, A N" sort="Toropin, A N" uniqKey="Toropin A" first="A. N." last="Toropin">A. N. Toropin</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Touchard, A M" sort="Touchard, A M" uniqKey="Touchard A" first="A-M." last="Touchard">A-M. Touchard</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Tovey, S N" sort="Tovey, S N" uniqKey="Tovey S" first="S. N." last="Tovey">S. N. Tovey</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Tran, M T" sort="Tran, M T" uniqKey="Tran M" first="M-T." last="Tran">M-T. Tran</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Tsesmelis, E" sort="Tsesmelis, E" uniqKey="Tsesmelis E" first="E." last="Tsesmelis">E. Tsesmelis</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Ulrichs, J" sort="Ulrichs, J" uniqKey="Ulrichs J" first="J." last="Ulrichs">J. Ulrichs</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation></author><author><name sortKey="Uros, V" sort="Uros, V" uniqKey="Uros V" first="V." last="Uros">V. Uros</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Valdata Nappi, M" sort="Valdata Nappi, M" uniqKey="Valdata Nappi M" first="M." last="Valdata-Nappi">M. 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Vieira</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Vinogradova, T" sort="Vinogradova, T" uniqKey="Vinogradova T" first="T." last="Vinogradova">T. Vinogradova</name><affiliation><mods:affiliation>UCLA, Los Angeles, CA, USA</mods:affiliation></affiliation></author><author><name sortKey="Vo, M K" sort="Vo, M K" uniqKey="Vo M" first="M-K." last="Vo">M-K. Vo</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Volkov, S A" sort="Volkov, S A" uniqKey="Volkov S" first="S. A." last="Volkov">S. A. Volkov</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Weber, F" sort="Weber, F" uniqKey="Weber F" first="F." last="Weber">F. 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Altegoer</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Astier, P" sort="Astier, P" uniqKey="Astier P" first="P." last="Astier">P. Astier</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Autiero, D" sort="Autiero, D" uniqKey="Autiero D" first="D." last="Autiero">D. Autiero</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Baldisseri, A" sort="Baldisseri, A" uniqKey="Baldisseri A" first="A." last="Baldisseri">A. Baldisseri</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Baldo Ceolin, M" sort="Baldo Ceolin, M" uniqKey="Baldo Ceolin M" first="M." last="Baldo-Ceolin">M. Baldo-Ceolin</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Ballocchi, G" sort="Ballocchi, G" uniqKey="Ballocchi G" first="G." last="Ballocchi">G. Ballocchi</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Banner, M" sort="Banner, M" uniqKey="Banner M" first="M." last="Banner">M. Banner</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Basa, S" sort="Basa, S" uniqKey="Basa S" first="S." last="Basa">S. Basa</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Bassompierre, G" sort="Bassompierre, G" uniqKey="Bassompierre G" first="G." last="Bassompierre">G. Bassompierre</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Benslama, K" sort="Benslama, K" uniqKey="Benslama K" first="K." last="Benslama">K. Benslama</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Besson, N" sort="Besson, N" uniqKey="Besson N" first="N." last="Besson">N. Besson</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Bird, I" sort="Bird, I" uniqKey="Bird I" first="I." last="Bird">I. Bird</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Blumenfeld, B" sort="Blumenfeld, B" uniqKey="Blumenfeld B" first="B." last="Blumenfeld">B. Blumenfeld</name><affiliation><mods:affiliation>Johns Hopkins Univ., Baltimore, MD, USA</mods:affiliation></affiliation></author><author><name sortKey="Bobisut, F" sort="Bobisut, F" uniqKey="Bobisut F" first="F." last="Bobisut">F. Bobisut</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Bouchez, J" sort="Bouchez, J" uniqKey="Bouchez J" first="J." last="Bouchez">J. Bouchez</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Boyd, S" sort="Boyd, S" uniqKey="Boyd S" first="S." last="Boyd">S. Boyd</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation></author><author><name sortKey="Bueno, A" sort="Bueno, A" uniqKey="Bueno A" first="A." last="Bueno">A. Bueno</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Bunyatov, S" sort="Bunyatov, S" uniqKey="Bunyatov S" first="S." last="Bunyatov">S. Bunyatov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Camilleri, L" sort="Camilleri, L" uniqKey="Camilleri L" first="L." last="Camilleri">L. Camilleri</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Cardini, A" sort="Cardini, A" uniqKey="Cardini A" first="A." last="Cardini">A. Cardini</name><affiliation><mods:affiliation>UCLA, Los Angeles, CA, USA</mods:affiliation></affiliation></author><author><name sortKey="Castera, A" sort="Castera, A" uniqKey="Castera A" first="A." last="Castera">A. Castera</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Cattaneo, P W" sort="Cattaneo, P W" uniqKey="Cattaneo P" first="P. W." last="Cattaneo">P. W. Cattaneo</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Cavasinni, V" sort="Cavasinni, V" uniqKey="Cavasinni V" first="V." last="Cavasinni">V. Cavasinni</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Cervera Villanueva, A" sort="Cervera Villanueva, A" uniqKey="Cervera Villanueva A" first="A." last="Cervera-Villanueva">A. Cervera-Villanueva</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Collazuol, G M" sort="Collazuol, G M" uniqKey="Collazuol G" first="G. M." last="Collazuol">G. M. Collazuol</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Conforto, G" sort="Conforto, G" uniqKey="Conforto G" first="G." last="Conforto">G. Conforto</name><affiliation><mods:affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Conta, C" sort="Conta, C" uniqKey="Conta C" first="C." last="Conta">C. Conta</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Contalbrigo, M" sort="Contalbrigo, M" uniqKey="Contalbrigo M" first="M." last="Contalbrigo">M. Contalbrigo</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Cousins, R" sort="Cousins, R" uniqKey="Cousins R" first="R." last="Cousins">R. Cousins</name><affiliation><mods:affiliation>UCLA, Los Angeles, CA, USA</mods:affiliation></affiliation></author><author><name sortKey="Daniels, D" sort="Daniels, D" uniqKey="Daniels D" first="D." last="Daniels">D. Daniels</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Santo, A De" sort="Santo, A De" uniqKey="Santo A" first="A. De" last="Santo">A. De Santo</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Prete, T Del" sort="Prete, T Del" uniqKey="Prete T" first="T. Del" last="Prete">T. Del Prete</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Dignan, T" sort="Dignan, T" uniqKey="Dignan T" first="T." last="Dignan">T. Dignan</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Lella, L Di" sort="Lella, L Di" uniqKey="Lella L" first="L. Di" last="Lella">L. Di Lella</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Do Couto E Silva, E" sort="Do Couto E Silva, E" uniqKey="Do Couto E Silva E" first="E." last="Do Couto E Silva">E. Do Couto E Silva</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Donnelly, I J" sort="Donnelly, I J" uniqKey="Donnelly I" first="I. J." last="Donnelly">I. J. Donnelly</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation><affiliation><mods:affiliation>ANSTO,Sydney, Menai, Australia</mods:affiliation></affiliation></author><author><name sortKey="Dumarchez, J" sort="Dumarchez, J" uniqKey="Dumarchez J" first="J." last="Dumarchez">J. Dumarchez</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Fazio, T" sort="Fazio, T" uniqKey="Fazio T" first="T." last="Fazio">T. Fazio</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Feldman, G J" sort="Feldman, G J" uniqKey="Feldman G" first="G. J." last="Feldman">G. J. Feldman</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Ferrari, R" sort="Ferrari, R" uniqKey="Ferrari R" first="R." last="Ferrari">R. Ferrari</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Ferrere, D" sort="Ferrere, D" uniqKey="Ferrere D" first="D." last="Ferrère">D. Ferrère</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Flaminio, V" sort="Flaminio, V" uniqKey="Flaminio V" first="V." last="Flaminio">V. Flaminio</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Fraternali, M" sort="Fraternali, M" uniqKey="Fraternali M" first="M." last="Fraternali">M. Fraternali</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Gaillard, J M" sort="Gaillard, J M" uniqKey="Gaillard J" first="J-M." last="Gaillard">J-M. Gaillard</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Galumian, P" sort="Galumian, P" uniqKey="Galumian P" first="P." last="Galumian">P. Galumian</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Gangler, E" sort="Gangler, E" uniqKey="Gangler E" first="E." last="Gangler">E. Gangler</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Geiser, A" sort="Geiser, A" uniqKey="Geiser A" first="A." last="Geiser">A. Geiser</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Geppert, D" sort="Geppert, D" uniqKey="Geppert D" first="D." last="Geppert">D. Geppert</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Gibin, D" sort="Gibin, D" uniqKey="Gibin D" first="D." last="Gibin">D. Gibin</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Gninenko, S N" sort="Gninenko, S N" uniqKey="Gninenko S" first="S. N." last="Gninenko">S. N. Gninenko</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Gomez Cadenas, J J" sort="Gomez Cadenas, J J" uniqKey="Gomez Cadenas J" first="J-J." last="Gomez-Cadenas">J-J. Gomez-Cadenas</name><affiliation><mods:affiliation>Univ. of Massachusetts, Amherst, MA, USA</mods:affiliation></affiliation><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Gosset, J" sort="Gosset, J" uniqKey="Gosset J" first="J." last="Gosset">J. Gosset</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Go Ling, C" sort="Go Ling, C" uniqKey="Go Ling C" first="C." last="Gö Ling">C. Gö Ling</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Gouanere, M" sort="Gouanere, M" uniqKey="Gouanere M" first="M." last="Gouanère">M. Gouanère</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Grant, A" sort="Grant, A" uniqKey="Grant A" first="A." last="Grant">A. Grant</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Graziani, G" sort="Graziani, G" uniqKey="Graziani G" first="G." last="Graziani">G. Graziani</name><affiliation><mods:affiliation>Univ. of Florence and INFN, Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Guglielmi, A" sort="Guglielmi, A" uniqKey="Guglielmi A" first="A." last="Guglielmi">A. Guglielmi</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Hagner, C" sort="Hagner, C" uniqKey="Hagner C" first="C." last="Hagner">C. Hagner</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Hernando, J" sort="Hernando, J" uniqKey="Hernando J" first="J." last="Hernando">J. Hernando</name><affiliation><mods:affiliation>Univ. of Massachusetts, Amherst, MA, USA</mods:affiliation></affiliation><affiliation><mods:affiliation>1 Now at UCSC, Santa Cruz, CA, USA.</mods:affiliation></affiliation></author><author><name sortKey="Hubbard, D" sort="Hubbard, D" uniqKey="Hubbard D" first="D." last="Hubbard">D. Hubbard</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Hurst, P" sort="Hurst, P" uniqKey="Hurst P" first="P." last="Hurst">P. Hurst</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Hyett, N" sort="Hyett, N" uniqKey="Hyett N" first="N." last="Hyett">N. Hyett</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Iacopini, E" sort="Iacopini, E" uniqKey="Iacopini E" first="E." last="Iacopini">E. Iacopini</name><affiliation><mods:affiliation>Univ. of Florence and INFN, Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Joseph, C" sort="Joseph, C" uniqKey="Joseph C" first="C." last="Joseph">C. Joseph</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Kekez, D" sort="Kekez, D" uniqKey="Kekez D" first="D." last="Kekez">D. Kekez</name><affiliation><mods:affiliation>Rudjer Bošković Institute, Zagreb, Croatia</mods:affiliation></affiliation></author><author><name sortKey="Khomenko, B" sort="Khomenko, B" uniqKey="Khomenko B" first="B." last="Khomenko">B. Khomenko</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Kirsanov, M M" sort="Kirsanov, M M" uniqKey="Kirsanov M" first="M. M." last="Kirsanov">M. M. Kirsanov</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Klimov, O" sort="Klimov, O" uniqKey="Klimov O" first="O." last="Klimov">O. Klimov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Kokkonen, J" sort="Kokkonen, J" uniqKey="Kokkonen J" first="J." last="Kokkonen">J. Kokkonen</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Kovzelev, A V" sort="Kovzelev, A V" uniqKey="Kovzelev A" first="A. V." last="Kovzelev">A. V. Kovzelev</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Kuznetsov, V" sort="Kuznetsov, V" uniqKey="Kuznetsov V" first="V." last="Kuznetsov">V. Kuznetsov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Lacaprara, S" sort="Lacaprara, S" uniqKey="Lacaprara S" first="S." last="Lacaprara">S. Lacaprara</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Lanza, A" sort="Lanza, A" uniqKey="Lanza A" first="A." last="Lanza">A. Lanza</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="La Rotonda, L" sort="La Rotonda, L" uniqKey="La Rotonda L" first="L." last="La Rotonda">L. La Rotonda</name><affiliation><mods:affiliation>Univ. of Calabria and INFN, Cosenza, Italy</mods:affiliation></affiliation></author><author><name sortKey="Laveder, M" sort="Laveder, M" uniqKey="Laveder M" first="M." last="Laveder">M. Laveder</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Letessier Selvon, A" sort="Letessier Selvon, A" uniqKey="Letessier Selvon A" first="A." last="Letessier-Selvon">A. Letessier-Selvon</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Levy, J M" sort="Levy, J M" uniqKey="Levy J" first="J-M." last="Levy">J-M. Levy</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Linssen, L" sort="Linssen, L" uniqKey="Linssen L" first="L." last="Linssen">L. Linssen</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Ljubi I, A" sort="Ljubi I, A" uniqKey="Ljubi I A" first="A." last="Ljubi I">A. Ljubi I</name><affiliation><mods:affiliation>Rudjer Bošković Institute, Zagreb, Croatia</mods:affiliation></affiliation></author><author><name sortKey="Long, J" sort="Long, J" uniqKey="Long J" first="J." last="Long">J. Long</name><affiliation><mods:affiliation>Johns Hopkins Univ., Baltimore, MD, USA</mods:affiliation></affiliation><affiliation><mods:affiliation>2 Now at Univ. of Colorado, Boulder, CO, USA.</mods:affiliation></affiliation></author><author><name sortKey="Lupi, A" sort="Lupi, A" uniqKey="Lupi A" first="A." last="Lupi">A. Lupi</name><affiliation><mods:affiliation>Univ. of Florence and INFN, Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Manola Poggioli, E" sort="Manola Poggioli, E" uniqKey="Manola Poggioli E" first="E." last="Manola-Poggioli">E. Manola-Poggioli</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Marchionni, A" sort="Marchionni, A" uniqKey="Marchionni A" first="A." last="Marchionni">A. Marchionni</name><affiliation><mods:affiliation>Univ. of Florence and INFN, Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Martelli, F" sort="Martelli, F" uniqKey="Martelli F" first="F." last="Martelli">F. Martelli</name><affiliation><mods:affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Mechain, X" sort="Mechain, X" uniqKey="Mechain X" first="X." last="Méchain">X. Méchain</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Mendiburu, J P" sort="Mendiburu, J P" uniqKey="Mendiburu J" first="J-P." last="Mendiburu">J-P. Mendiburu</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Meyer, J P" sort="Meyer, J P" uniqKey="Meyer J" first="J-P." last="Meyer">J-P. Meyer</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Mezzetto, M" sort="Mezzetto, M" uniqKey="Mezzetto M" first="M." last="Mezzetto">M. Mezzetto</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Mishra, S R" sort="Mishra, S R" uniqKey="Mishra S" first="S. R." last="Mishra">S. R. Mishra</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Moorhead, G F" sort="Moorhead, G F" uniqKey="Moorhead G" first="G. F." last="Moorhead">G. F. Moorhead</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Mossuz, L" sort="Mossuz, L" uniqKey="Mossuz L" first="L." last="Mossuz">L. Mossuz</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Nedelec, P" sort="Nedelec, P" uniqKey="Nedelec P" first="P." last="Nédélec">P. Nédélec</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Nefedov, Yu" sort="Nefedov, Yu" uniqKey="Nefedov Y" first="Yu." last="Nefedov">Yu. Nefedov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Nguyen Mau, C" sort="Nguyen Mau, C" uniqKey="Nguyen Mau C" first="C." last="Nguyen-Mau">C. Nguyen-Mau</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Orestano, D" sort="Orestano, D" uniqKey="Orestano D" first="D." last="Orestano">D. Orestano</name><affiliation><mods:affiliation>Roma-III Univ., Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Pastore, F" sort="Pastore, F" uniqKey="Pastore F" first="F." last="Pastore">F. Pastore</name><affiliation><mods:affiliation>Roma-III Univ., Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Peak, L S" sort="Peak, L S" uniqKey="Peak L" first="L. S." last="Peak">L. S. Peak</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation></author><author><name sortKey="Pennacchio, E" sort="Pennacchio, E" uniqKey="Pennacchio E" first="E." last="Pennacchio">E. Pennacchio</name><affiliation><mods:affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Perroud, J P" sort="Perroud, J P" uniqKey="Perroud J" first="J-P." last="Perroud">J-P. Perroud</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Pessard, H" sort="Pessard, H" uniqKey="Pessard H" first="H." last="Pessard">H. Pessard</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Petti, R" sort="Petti, R" uniqKey="Petti R" first="R." last="Petti">R. Petti</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Placci, A" sort="Placci, A" uniqKey="Placci A" first="A." last="Placci">A. Placci</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Plothow Besch, H" sort="Plothow Besch, H" uniqKey="Plothow Besch H" first="H." last="Plothow-Besch">H. Plothow-Besch</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Pluquet, A" sort="Pluquet, A" uniqKey="Pluquet A" first="A." last="Pluquet">A. Pluquet</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Polesello, G" sort="Polesello, G" uniqKey="Polesello G" first="G." last="Polesello">G. Polesello</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Pollmann, D" sort="Pollmann, D" uniqKey="Pollmann D" first="D." last="Pollmann">D. Pollmann</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Pope, B G" sort="Pope, B G" uniqKey="Pope B" first="B. G." last="Pope">B. G. Pope</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Popov, B" sort="Popov, B" uniqKey="Popov B" first="B." last="Popov">B. Popov</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Poulsen, C" sort="Poulsen, C" uniqKey="Poulsen C" first="C." last="Poulsen">C. Poulsen</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Rathouit, P" sort="Rathouit, P" uniqKey="Rathouit P" first="P." last="Rathouit">P. Rathouit</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Roda, C" sort="Roda, C" uniqKey="Roda C" first="C." last="Roda">C. Roda</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="Rubbia, A" sort="Rubbia, A" uniqKey="Rubbia A" first="A." last="Rubbia">A. Rubbia</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Salvatore, F" sort="Salvatore, F" uniqKey="Salvatore F" first="F." last="Salvatore">F. Salvatore</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Scannicchio, D" sort="Scannicchio, D" uniqKey="Scannicchio D" first="D." last="Scannicchio">D. Scannicchio</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Schahmaneche, K" sort="Schahmaneche, K" uniqKey="Schahmaneche K" first="K." last="Schahmaneche">K. Schahmaneche</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Schmidt, B" sort="Schmidt, B" uniqKey="Schmidt B" first="B." last="Schmidt">B. Schmidt</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Sconza, A" sort="Sconza, A" uniqKey="Sconza A" first="A." last="Sconza">A. Sconza</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author><author><name sortKey="Serrano, M" sort="Serrano, M" uniqKey="Serrano M" first="M." last="Serrano">M. Serrano</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Sevior, M E" sort="Sevior, M E" uniqKey="Sevior M" first="M. E." last="Sevior">M. E. Sevior</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Sillou, D" sort="Sillou, D" uniqKey="Sillou D" first="D." last="Sillou">D. Sillou</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Soler, F J P" sort="Soler, F J P" uniqKey="Soler F" first="F. J. P." last="Soler">F. J. P. Soler</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation></author><author><name sortKey="Sozzi, G" sort="Sozzi, G" uniqKey="Sozzi G" first="G." last="Sozzi">G. Sozzi</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Steele, D" sort="Steele, D" uniqKey="Steele D" first="D." last="Steele">D. Steele</name><affiliation><mods:affiliation>Johns Hopkins Univ., Baltimore, MD, USA</mods:affiliation></affiliation><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Steffen, P" sort="Steffen, P" uniqKey="Steffen P" first="P." last="Steffen">P. Steffen</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Steininger, M" sort="Steininger, M" uniqKey="Steininger M" first="M." last="Steininger">M. Steininger</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Stiegler, U" sort="Stiegler, U" uniqKey="Stiegler U" first="U." last="Stiegler">U. Stiegler</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Stip Evi, M" sort="Stip Evi, M" uniqKey="Stip Evi M" first="M." last="Stip Evi">M. Stip Evi</name><affiliation><mods:affiliation>Rudjer Bošković Institute, Zagreb, Croatia</mods:affiliation></affiliation></author><author><name sortKey="Stolarczyk, T" sort="Stolarczyk, T" uniqKey="Stolarczyk T" first="T." last="Stolarczyk">T. Stolarczyk</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Tareb Reyes, M" sort="Tareb Reyes, M" uniqKey="Tareb Reyes M" first="M." last="Tareb-Reyes">M. Tareb-Reyes</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Taylor, G N" sort="Taylor, G N" uniqKey="Taylor G" first="G. N." last="Taylor">G. N. Taylor</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Tereshchenko, S" sort="Tereshchenko, S" uniqKey="Tereshchenko S" first="S." last="Tereshchenko">S. Tereshchenko</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation></author><author><name sortKey="Toropin, A N" sort="Toropin, A N" uniqKey="Toropin A" first="A. N." last="Toropin">A. N. Toropin</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Touchard, A M" sort="Touchard, A M" uniqKey="Touchard A" first="A-M." last="Touchard">A-M. Touchard</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Tovey, S N" sort="Tovey, S N" uniqKey="Tovey S" first="S. N." last="Tovey">S. N. Tovey</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Tran, M T" sort="Tran, M T" uniqKey="Tran M" first="M-T." last="Tran">M-T. Tran</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Tsesmelis, E" sort="Tsesmelis, E" uniqKey="Tsesmelis E" first="E." last="Tsesmelis">E. Tsesmelis</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Ulrichs, J" sort="Ulrichs, J" uniqKey="Ulrichs J" first="J." last="Ulrichs">J. Ulrichs</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation></author><author><name sortKey="Uros, V" sort="Uros, V" uniqKey="Uros V" first="V." last="Uros">V. Uros</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Valdata Nappi, M" sort="Valdata Nappi, M" uniqKey="Valdata Nappi M" first="M." last="Valdata-Nappi">M. Valdata-Nappi</name><affiliation><mods:affiliation>Univ. of Calabria and INFN, Cosenza, Italy</mods:affiliation></affiliation><affiliation><mods:affiliation>3 Now at Perugia Univ., Perugia, Italy.</mods:affiliation></affiliation></author><author><name sortKey="Valuev, V" sort="Valuev, V" uniqKey="Valuev V" first="V." last="Valuev">V. Valuev</name><affiliation><mods:affiliation>JINR, Dubna, Russia</mods:affiliation></affiliation><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Vannucci, F" sort="Vannucci, F" uniqKey="Vannucci F" first="F." last="Vannucci">F. Vannucci</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</mods:affiliation></affiliation></author><author><name sortKey="Varvell, K E" sort="Varvell, K E" uniqKey="Varvell K" first="K. E." last="Varvell">K. E. Varvell</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation><affiliation><mods:affiliation>ANSTO,Sydney, Menai, Australia</mods:affiliation></affiliation></author><author><name sortKey="Veltri, M" sort="Veltri, M" uniqKey="Veltri M" first="M." last="Veltri">M. Veltri</name><affiliation><mods:affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</mods:affiliation></affiliation></author><author><name sortKey="Vercesi, V" sort="Vercesi, V" uniqKey="Vercesi V" first="V." last="Vercesi">V. Vercesi</name><affiliation><mods:affiliation>Univ. of Pavia and INFN, Pavia, Italy</mods:affiliation></affiliation></author><author><name sortKey="Verkindt, D" sort="Verkindt, D" uniqKey="Verkindt D" first="D." last="Verkindt">D. Verkindt</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Vieira, J M" sort="Vieira, J M" uniqKey="Vieira J" first="J-M." last="Vieira">J-M. Vieira</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Vinogradova, T" sort="Vinogradova, T" uniqKey="Vinogradova T" first="T." last="Vinogradova">T. Vinogradova</name><affiliation><mods:affiliation>UCLA, Los Angeles, CA, USA</mods:affiliation></affiliation></author><author><name sortKey="Vo, M K" sort="Vo, M K" uniqKey="Vo M" first="M-K." last="Vo">M-K. Vo</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Volkov, S A" sort="Volkov, S A" uniqKey="Volkov S" first="S. A." last="Volkov">S. A. Volkov</name><affiliation><mods:affiliation>Institute for Nuclear Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Weber, F" sort="Weber, F" uniqKey="Weber F" first="F." last="Weber">F. Weber</name><affiliation><mods:affiliation>Harvard Univ., Cambridge, MA, USA</mods:affiliation></affiliation></author><author><name sortKey="Weisse, T" sort="Weisse, T" uniqKey="Weisse T" first="T." last="Weisse">T. Weisse</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Werlen, M" sort="Werlen, M" uniqKey="Werlen M" first="M." last="Werlen">M. Werlen</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Wilson, F" sort="Wilson, F" uniqKey="Wilson F" first="F." last="Wilson">F. Wilson</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Winton, L J" sort="Winton, L J" uniqKey="Winton L" first="L. J." last="Winton">L. J. Winton</name><affiliation><mods:affiliation>University of Melbourne, Melbourne, Australia</mods:affiliation></affiliation></author><author><name sortKey="Yabsley, B D" sort="Yabsley, B D" uniqKey="Yabsley B" first="B. D." last="Yabsley">B. D. Yabsley</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</mods:affiliation></affiliation></author><author><name sortKey="Zaccone, H" sort="Zaccone, H" uniqKey="Zaccone H" first="H." last="Zaccone">H. Zaccone</name><affiliation><mods:affiliation>DAPNIA, CEA Saclay, France</mods:affiliation></affiliation></author><author><name sortKey="Zuber, K" sort="Zuber, K" uniqKey="Zuber K" first="K." last="Zuber">K. Zuber</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Physics Letters B</title><title level="j" type="abbrev">PLB</title><idno type="ISSN">0370-2693</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1998">1998</date><biblScope unit="volume">428</biblScope><biblScope unit="issue">1–2</biblScope><biblScope unit="page" from="197">197</biblScope><biblScope unit="page" to="205">205</biblScope></imprint><idno type="ISSN">0370-2693</idno></series><idno type="istex">3AD7310F741D3D1C2FF099745D79C94F53C93238</idno><idno type="DOI">10.1016/S0370-2693(98)00402-X</idno><idno type="PII">S0370-2693(98)00402-X</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0370-2693</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Altegoer</term><term>Background events</term><term>Boson</term><term>Boson flux</term><term>Candidate events</term><term>Cern</term><term>Computer physics commun</term><term>Crystal barrel collaboration</term><term>Data sample</term><term>Detector</term><term>Drift chambers</term><term>Ecal</term><term>Electromagnetic</term><term>Electromagnetic shower</term><term>Elsevier science</term><term>Energetic cluster</term><term>Energy spectrum</term><term>External coulomb field</term><term>Gauge boson</term><term>Hcal</term><term>Light gauge boson</term><term>Mass region</term><term>Meijer drees</term><term>Monte carlo</term><term>Muon</term><term>Muon chambers</term><term>Neutral pions</term><term>Neutrino</term><term>Neutrino events</term><term>Neutrino interactions</term><term>Neutrino target</term><term>Nomad</term><term>Nomad collaboration</term><term>Nomad detector</term><term>Nucl</term><term>Nuclear research</term><term>Phys</term><term>Physics letters</term><term>Preshower detector</term><term>Primakoff effect</term><term>Same reconstruction program</term><term>Selection criteria</term><term>Shower energy</term><term>Significant activity</term><term>Simulation</term><term>Total number</term><term>Upper limit</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Altegoer</term><term>Background events</term><term>Boson</term><term>Boson flux</term><term>Candidate events</term><term>Cern</term><term>Computer physics commun</term><term>Crystal barrel collaboration</term><term>Data sample</term><term>Detector</term><term>Drift chambers</term><term>Ecal</term><term>Electromagnetic</term><term>Electromagnetic shower</term><term>Elsevier science</term><term>Energetic cluster</term><term>Energy spectrum</term><term>External coulomb field</term><term>Gauge boson</term><term>Hcal</term><term>Light gauge boson</term><term>Mass region</term><term>Meijer drees</term><term>Monte carlo</term><term>Muon</term><term>Muon chambers</term><term>Neutral pions</term><term>Neutrino</term><term>Neutrino events</term><term>Neutrino interactions</term><term>Neutrino target</term><term>Nomad</term><term>Nomad collaboration</term><term>Nomad detector</term><term>Nucl</term><term>Nuclear research</term><term>Phys</term><term>Physics letters</term><term>Preshower detector</term><term>Primakoff effect</term><term>Same reconstruction program</term><term>Selection criteria</term><term>Shower energy</term><term>Significant activity</term><term>Simulation</term><term>Total number</term><term>Upper limit</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: A search was made for a new light gauge boson X which might be produced in π0→γ+X decay from neutral pions generated by 450 GeV protons in the CERN SPS neutrino target. The X's would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect, in the process of X→π0 conversion in the external Coulomb field of a nucleus. With 1.45×1018 protons on target, 20 candidate events with energy between 8 and 140 GeV were found from the analysis of neutrino data. This number is in agreement with the expectation of 18.1±2.8 background events from standard neutrino processes. A new 90 %C.L. upper limit on the branching ratio Br(π0→γ+X)< (3.3 to 1.9)×10−5 for X masses ranging from 0 to 120 MeV/c2 is obtained.</div></front></TEI><istex><corpusName>elsevier</corpusName><keywords><teeft><json:string>neutrino</json:string><json:string>ecal</json:string><json:string>nomad</json:string><json:string>boson</json:string><json:string>phys</json:string><json:string>nomad detector</json:string><json:string>altegoer</json:string><json:string>nucl</json:string><json:string>muon</json:string><json:string>physics letters</json:string><json:string>hcal</json:string><json:string>cern</json:string><json:string>neutrino target</json:string><json:string>candidate events</json:string><json:string>electromagnetic</json:string><json:string>neutrino interactions</json:string><json:string>background events</json:string><json:string>upper limit</json:string><json:string>detector</json:string><json:string>mass region</json:string><json:string>drift chambers</json:string><json:string>primakoff effect</json:string><json:string>selection criteria</json:string><json:string>data sample</json:string><json:string>neutrino events</json:string><json:string>total number</json:string><json:string>simulation</json:string><json:string>computer physics commun</json:string><json:string>nuclear research</json:string><json:string>elsevier science</json:string><json:string>electromagnetic shower</json:string><json:string>external coulomb field</json:string><json:string>energy spectrum</json:string><json:string>crystal barrel collaboration</json:string><json:string>neutral pions</json:string><json:string>light gauge boson</json:string><json:string>preshower detector</json:string><json:string>energetic cluster</json:string><json:string>muon chambers</json:string><json:string>monte carlo</json:string><json:string>same reconstruction program</json:string><json:string>shower energy</json:string><json:string>boson flux</json:string><json:string>nomad collaboration</json:string><json:string>gauge boson</json:string><json:string>meijer drees</json:string><json:string>significant activity</json:string></teeft></keywords><author><json:item><name>J. Altegoer</name><affiliations><json:string>Dortmund Univ., Dortmund, Germany</json:string></affiliations></json:item><json:item><name>P. Astier</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>D. Autiero</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>A. Baldisseri</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>M. Baldo-Ceolin</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>G. Ballocchi</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>M. Banner</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>S. Basa</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>G. Bassompierre</name><affiliations><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>K. Benslama</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>N. Besson</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>I. Bird</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>B. Blumenfeld</name><affiliations><json:string>Johns Hopkins Univ., Baltimore, MD, USA</json:string></affiliations></json:item><json:item><name>F. Bobisut</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>J. Bouchez</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>S. Boyd</name><affiliations><json:string>Univ. of Sydney, Sydney, Australia</json:string></affiliations></json:item><json:item><name>A. Bueno</name><affiliations><json:string>Harvard Univ., Cambridge, MA, USA</json:string></affiliations></json:item><json:item><name>S. Bunyatov</name><affiliations><json:string>JINR, Dubna, Russia</json:string></affiliations></json:item><json:item><name>L. Camilleri</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>A. Cardini</name><affiliations><json:string>UCLA, Los Angeles, CA, USA</json:string></affiliations></json:item><json:item><name>A. Castera</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>P.W. Cattaneo</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>V. Cavasinni</name><affiliations><json:string>Univ. of Pisa and INFN, Pisa, Italy</json:string></affiliations></json:item><json:item><name>A. Cervera-Villanueva</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>G.M. Collazuol</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>G. Conforto</name><affiliations><json:string>Univ. of Urbino, Urbino, and INFN Florence, Italy</json:string></affiliations></json:item><json:item><name>C. Conta</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>M. Contalbrigo</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>R. Cousins</name><affiliations><json:string>UCLA, Los Angeles, CA, USA</json:string></affiliations></json:item><json:item><name>D. Daniels</name><affiliations><json:string>Harvard Univ., Cambridge, MA, USA</json:string></affiliations></json:item><json:item><name>A.De Santo</name><affiliations><json:string>Univ. of Pisa and INFN, Pisa, Italy</json:string></affiliations></json:item><json:item><name>T.Del Prete</name><affiliations><json:string>Univ. of Pisa and INFN, Pisa, Italy</json:string></affiliations></json:item><json:item><name>T. Dignan</name><affiliations><json:string>Harvard Univ., Cambridge, MA, USA</json:string></affiliations></json:item><json:item><name>L.Di Lella</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>E. do Couto e Silva</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>I.J. Donnelly</name><affiliations><json:string>Univ. of Sydney, Sydney, Australia</json:string><json:string>ANSTO,Sydney, Menai, Australia</json:string></affiliations></json:item><json:item><name>J. Dumarchez</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>T. Fazio</name><affiliations><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>G.J. Feldman</name><affiliations><json:string>Harvard Univ., Cambridge, MA, USA</json:string></affiliations></json:item><json:item><name>R. Ferrari</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>D. Ferrère</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>V. Flaminio</name><affiliations><json:string>Univ. of Pisa and INFN, Pisa, Italy</json:string></affiliations></json:item><json:item><name>M. Fraternali</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>J-M. Gaillard</name><affiliations><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>P. Galumian</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>E. Gangler</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>A. Geiser</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>D. Geppert</name><affiliations><json:string>Dortmund Univ., Dortmund, Germany</json:string></affiliations></json:item><json:item><name>D. Gibin</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>S.N. Gninenko</name><affiliations><json:string>Institute for Nuclear Research, INR Moscow, Russia</json:string></affiliations></json:item><json:item><name>J-J. Gomez-Cadenas</name><affiliations><json:string>Univ. of Massachusetts, Amherst, MA, USA</json:string><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>J. Gosset</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>C. Gößling</name><affiliations><json:string>Dortmund Univ., Dortmund, Germany</json:string></affiliations></json:item><json:item><name>M. Gouanère</name><affiliations><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>A. Grant</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>G. Graziani</name><affiliations><json:string>Univ. of Florence and INFN, Florence, Italy</json:string></affiliations></json:item><json:item><name>A. Guglielmi</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>C. Hagner</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>J. Hernando</name><affiliations><json:string>Univ. of Massachusetts, Amherst, MA, USA</json:string><json:string>1 Now at UCSC, Santa Cruz, CA, USA.</json:string></affiliations></json:item><json:item><name>D. Hubbard</name><affiliations><json:string>Harvard Univ., Cambridge, MA, USA</json:string></affiliations></json:item><json:item><name>P. Hurst</name><affiliations><json:string>Harvard Univ., Cambridge, MA, USA</json:string></affiliations></json:item><json:item><name>N. Hyett</name><affiliations><json:string>University of Melbourne, Melbourne, Australia</json:string></affiliations></json:item><json:item><name>E. Iacopini</name><affiliations><json:string>Univ. of Florence and INFN, Florence, Italy</json:string></affiliations></json:item><json:item><name>C. Joseph</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>D. Kekez</name><affiliations><json:string>Rudjer Bošković Institute, Zagreb, Croatia</json:string></affiliations></json:item><json:item><name>B. Khomenko</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>M.M. Kirsanov</name><affiliations><json:string>Institute for Nuclear Research, INR Moscow, Russia</json:string></affiliations></json:item><json:item><name>O. Klimov</name><affiliations><json:string>JINR, Dubna, Russia</json:string></affiliations></json:item><json:item><name>J. Kokkonen</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>A.V. Kovzelev</name><affiliations><json:string>Institute for Nuclear Research, INR Moscow, Russia</json:string></affiliations></json:item><json:item><name>V. Kuznetsov</name><affiliations><json:string>JINR, Dubna, Russia</json:string></affiliations></json:item><json:item><name>S. Lacaprara</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>A. Lanza</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>L. La Rotonda</name><affiliations><json:string>Univ. of Calabria and INFN, Cosenza, Italy</json:string></affiliations></json:item><json:item><name>M. Laveder</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>A. Letessier-Selvon</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>J-M. Levy</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>L. Linssen</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>A. Ljubičić</name><affiliations><json:string>Rudjer Bošković Institute, Zagreb, Croatia</json:string></affiliations></json:item><json:item><name>J. Long</name><affiliations><json:string>Johns Hopkins Univ., Baltimore, MD, USA</json:string><json:string>2 Now at Univ. of Colorado, Boulder, CO, USA.</json:string></affiliations></json:item><json:item><name>A. Lupi</name><affiliations><json:string>Univ. of Florence and INFN, Florence, Italy</json:string></affiliations></json:item><json:item><name>E. Manola-Poggioli</name><affiliations><json:string>LAPP, Annecy, France</json:string><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>A. Marchionni</name><affiliations><json:string>Univ. of Florence and INFN, Florence, Italy</json:string></affiliations></json:item><json:item><name>F. Martelli</name><affiliations><json:string>Univ. of Urbino, Urbino, and INFN Florence, Italy</json:string></affiliations></json:item><json:item><name>X. Méchain</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>J-P. Mendiburu</name><affiliations><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>J-P. Meyer</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>M. Mezzetto</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>S.R. Mishra</name><affiliations><json:string>Harvard Univ., Cambridge, MA, USA</json:string></affiliations></json:item><json:item><name>G.F. Moorhead</name><affiliations><json:string>University of Melbourne, Melbourne, Australia</json:string></affiliations></json:item><json:item><name>L. Mossuz</name><affiliations><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>P. Nédélec</name><affiliations><json:string>LAPP, Annecy, France</json:string><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>Yu. Nefedov</name><affiliations><json:string>JINR, Dubna, Russia</json:string></affiliations></json:item><json:item><name>C. Nguyen-Mau</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>D. Orestano</name><affiliations><json:string>Roma-III Univ., Rome, Italy</json:string></affiliations></json:item><json:item><name>F. Pastore</name><affiliations><json:string>Roma-III Univ., Rome, Italy</json:string></affiliations></json:item><json:item><name>L.S. Peak</name><affiliations><json:string>Univ. of Sydney, Sydney, Australia</json:string></affiliations></json:item><json:item><name>E. Pennacchio</name><affiliations><json:string>Univ. of Urbino, Urbino, and INFN Florence, Italy</json:string></affiliations></json:item><json:item><name>J-P. Perroud</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>H. Pessard</name><affiliations><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>R. Petti</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>A. Placci</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>H. Plothow-Besch</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>A. Pluquet</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>G. Polesello</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>D. Pollmann</name><affiliations><json:string>Dortmund Univ., Dortmund, Germany</json:string></affiliations></json:item><json:item><name>B.G. Pope</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>B. Popov</name><affiliations><json:string>JINR, Dubna, Russia</json:string><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>C. Poulsen</name><affiliations><json:string>University of Melbourne, Melbourne, Australia</json:string></affiliations></json:item><json:item><name>P. Rathouit</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>C. Roda</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string><json:string>Univ. of Pisa and INFN, Pisa, Italy</json:string></affiliations></json:item><json:item><name>A. Rubbia</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>F. Salvatore</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>D. Scannicchio</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>K. Schahmaneche</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>B. Schmidt</name><affiliations><json:string>Dortmund Univ., Dortmund, Germany</json:string></affiliations></json:item><json:item><name>A. Sconza</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item><json:item><name>M. Serrano</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>M.E. Sevior</name><affiliations><json:string>University of Melbourne, Melbourne, Australia</json:string></affiliations></json:item><json:item><name>D. Sillou</name><affiliations><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>F.J.P. Soler</name><affiliations><json:string>Univ. of Sydney, Sydney, Australia</json:string></affiliations></json:item><json:item><name>G. Sozzi</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>D. Steele</name><affiliations><json:string>Johns Hopkins Univ., Baltimore, MD, USA</json:string><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>P. Steffen</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>M. Steininger</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>U. Stiegler</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>M. Stipčević</name><affiliations><json:string>Rudjer Bošković Institute, Zagreb, Croatia</json:string></affiliations></json:item><json:item><name>T. Stolarczyk</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>M. Tareb-Reyes</name><affiliations><json:string>LAPP, Annecy, France</json:string><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>G.N. Taylor</name><affiliations><json:string>University of Melbourne, Melbourne, Australia</json:string></affiliations></json:item><json:item><name>S. Tereshchenko</name><affiliations><json:string>JINR, Dubna, Russia</json:string></affiliations></json:item><json:item><name>A.N. Toropin</name><affiliations><json:string>Institute for Nuclear Research, INR Moscow, Russia</json:string></affiliations></json:item><json:item><name>A-M. Touchard</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>S.N. Tovey</name><affiliations><json:string>University of Melbourne, Melbourne, Australia</json:string></affiliations></json:item><json:item><name>M-T. Tran</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>E. Tsesmelis</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>J. Ulrichs</name><affiliations><json:string>Univ. of Sydney, Sydney, Australia</json:string></affiliations></json:item><json:item><name>V. Uros</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>M. Valdata-Nappi</name><affiliations><json:string>Univ. of Calabria and INFN, Cosenza, Italy</json:string><json:string>3 Now at Perugia Univ., Perugia, Italy.</json:string></affiliations></json:item><json:item><name>V. Valuev</name><affiliations><json:string>JINR, Dubna, Russia</json:string><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>F. Vannucci</name><affiliations><json:string>LPNHE, Univ. of Paris, Paris VI and VII, France</json:string></affiliations></json:item><json:item><name>K.E. Varvell</name><affiliations><json:string>Univ. of Sydney, Sydney, Australia</json:string><json:string>ANSTO,Sydney, Menai, Australia</json:string></affiliations></json:item><json:item><name>M. Veltri</name><affiliations><json:string>Univ. of Urbino, Urbino, and INFN Florence, Italy</json:string></affiliations></json:item><json:item><name>V. Vercesi</name><affiliations><json:string>Univ. of Pavia and INFN, Pavia, Italy</json:string></affiliations></json:item><json:item><name>D. Verkindt</name><affiliations><json:string>LAPP, Annecy, France</json:string></affiliations></json:item><json:item><name>J-M. Vieira</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>T. Vinogradova</name><affiliations><json:string>UCLA, Los Angeles, CA, USA</json:string></affiliations></json:item><json:item><name>M-K. Vo</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>S.A. Volkov</name><affiliations><json:string>Institute for Nuclear Research, INR Moscow, Russia</json:string></affiliations></json:item><json:item><name>F. Weber</name><affiliations><json:string>Harvard Univ., Cambridge, MA, USA</json:string></affiliations></json:item><json:item><name>T. Weisse</name><affiliations><json:string>Dortmund Univ., Dortmund, Germany</json:string></affiliations></json:item><json:item><name>M. Werlen</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>F. Wilson</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>L.J. Winton</name><affiliations><json:string>University of Melbourne, Melbourne, Australia</json:string></affiliations></json:item><json:item><name>B.D. Yabsley</name><affiliations><json:string>Univ. of Sydney, Sydney, Australia</json:string></affiliations></json:item><json:item><name>H. Zaccone</name><affiliations><json:string>DAPNIA, CEA Saclay, France</json:string></affiliations></json:item><json:item><name>K. Zuber</name><affiliations><json:string>Dortmund Univ., Dortmund, Germany</json:string></affiliations></json:item></author><arkIstex>ark:/67375/6H6-J6MMSZZR-3</arkIstex><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>Abstract: A search was made for a new light gauge boson X which might be produced in π0→γ+X decay from neutral pions generated by 450 GeV protons in the CERN SPS neutrino target. The X's would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect, in the process of X→π0 conversion in the external Coulomb field of a nucleus. With 1.45×1018 protons on target, 20 candidate events with energy between 8 and 140 GeV were found from the analysis of neutrino data. This number is in agreement with the expectation of 18.1±2.8 background events from standard neutrino processes. A new 90 %C.L. upper limit on the branching ratio Br(π0→γ+X)> (3.3 to 1.9)×10−5 for X masses ranging from 0 to 120 MeV/c2 is obtained.</abstract><qualityIndicators><score>7.908</score><pdfWordCount>4360</pdfWordCount><pdfCharCount>20609</pdfCharCount><pdfVersion>1.2</pdfVersion><pdfPageCount>9</pdfPageCount><pdfPageSize>540 x 712 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractWordCount>129</abstractWordCount><abstractCharCount>752</abstractCharCount><keywordCount>0</keywordCount></qualityIndicators><title>Search for a new gauge boson in π 0 decays</title><pii><json:string>S0370-2693(98)00402-X</json:string></pii><corporate><json:item><name>NOMAD Collaboration</name></json:item></corporate><genre><json:string>research-article</json:string></genre><host><title>Physics Letters B</title><language><json:string>unknown</json:string></language><publicationDate>1998</publicationDate><issn><json:string>0370-2693</json:string></issn><pii><json:string>S0370-2693(00)X0168-2</json:string></pii><volume>428</volume><issue>1–2</issue><pages><first>197</first><last>205</last></pages><genre><json:string>journal</json:string></genre></host><namedEntities><unitex><date><json:string>1998</json:string><json:string>1995</json:string></date><geogName></geogName><orgName><json:string>National Science Foundation</json:string><json:string>Institute, Zagreb, Croatia</json:string><json:string>Boulder, CO</json:string><json:string>Australian Research Council</json:string><json:string>Department of Industry, Science and Technology</json:string><json:string>Germany, CERN, the Institut National</json:string><json:string>Department of Energy</json:string><json:string>France, the Istituto Nazionale</json:string><json:string>Italy, the Institute for Nuclear Research of the Russian Academy of Sciences and Russian Foundation</json:string><json:string>Institute for Nuclear Research, INR Moscow, Russia</json:string><json:string>SPS</json:string></orgName><orgName_funder><json:string>SPS</json:string></orgName_funder><orgName_provider></orgName_provider><persName><json:string>F. Weber</json:string><json:string>G.F. Moorhead</json:string><json:string>N. Hyett</json:string><json:string>F. Pastore</json:string><json:string>G.J. Feldman</json:string><json:string>J. Gomez</json:string><json:string>S.R. Mishra</json:string><json:string>C. Nguyen-Mau</json:string><json:string>S. Tereshchenko</json:string><json:string>M. Mezzetto</json:string><json:string>P. Hurst</json:string><json:string>Nikolai Krasnikov</json:string><json:string>E. Manola</json:string><json:string>D. Orestano</json:string><json:string>A.N. Toropin</json:string><json:string>A.V. Kovzelev</json:string><json:string>M. Tareb</json:string><json:string>D. Daniels</json:string><json:string>E. Pennacchio</json:string><json:string>F. Martelli</json:string><json:string>L.J. Winton</json:string><json:string>A. Cervera</json:string><json:string>T. Del</json:string><json:string>G.N. Taylor</json:string><json:string>L. Di</json:string><json:string>Atomique</json:string><json:string>T. Dignan</json:string><json:string>M.E. Sevior</json:string><json:string>G. Conforto</json:string><json:string>S.N. Tovey</json:string><json:string>M. Valdata</json:string><json:string>A. Bueno</json:string><json:string>Nucleare</json:string><json:string>S.N. Gninenko</json:string><json:string>A. Letessier</json:string><json:string>M. Veltri</json:string><json:string>Technologie</json:string><json:string>H. Plothow</json:string><json:string>John Ellis</json:string><json:string>C. Poulsen</json:string><json:string>S.A. Volkov</json:string><json:string>D. Hubbard</json:string></persName><placeName><json:string>Dortmund</json:string><json:string>Switzerland</json:string><json:string>Germany</json:string><json:string>Urbino</json:string><json:string>Perugia</json:string><json:string>Dubna</json:string><json:string>Australia</json:string><json:string>Pisa</json:string><json:string>Melbourne</json:string><json:string>Los Angeles</json:string><json:string>USA</json:string><json:string>Baltimore</json:string><json:string>Santa Cruz</json:string><json:string>MD</json:string><json:string>Rome</json:string><json:string>CA</json:string><json:string>Florence</json:string><json:string>Lausanne</json:string><json:string>France</json:string><json:string>Russia</json:string><json:string>Cambridge</json:string><json:string>Italy</json:string><json:string>Sydney</json:string></placeName><ref_url></ref_url><ref_bibl><json:string>J. Altegoer et al.</json:string></ref_bibl><bibl></bibl></unitex></namedEntities><ark><json:string>ark:/67375/6H6-J6MMSZZR-3</json:string></ark><categories><wos><json:string>1 - science</json:string><json:string>2 - physics, multidisciplinary</json:string></wos><scienceMetrix><json:string>1 - natural sciences</json:string><json:string>2 - physics & astronomy</json:string><json:string>3 - nuclear & particles physics</json:string></scienceMetrix><scopus><json:string>1 - Physical Sciences</json:string><json:string>2 - Physics and Astronomy</json:string><json:string>3 - Nuclear and High Energy Physics</json:string></scopus><inist><json:string>1 - sciences appliquees, technologies et medecines</json:string><json:string>2 - sciences biologiques et medicales</json:string><json:string>3 - sciences biologiques fondamentales et appliquees. psychologie</json:string><json:string>4 - biophysique des tissus, organes et organismes</json:string></inist></categories><publicationDate>1998</publicationDate><copyrightDate>1998</copyrightDate><doi><json:string>10.1016/S0370-2693(98)00402-X</json:string></doi><id>3AD7310F741D3D1C2FF099745D79C94F53C93238</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/3AD7310F741D3D1C2FF099745D79C94F53C93238/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/3AD7310F741D3D1C2FF099745D79C94F53C93238/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/3AD7310F741D3D1C2FF099745D79C94F53C93238/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a">Search for a new gauge boson in π 0 decays</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©1998 Elsevier Science B.V.</p></availability><date>1998</date></publicationStmt><notesStmt><note>Editor: L. Montanet</note><note type="content">Fig. 1: Side view of the NOMAD detector.</note><note type="content">Fig. 2: Feynman diagram for π0 production by Primakoff effect.</note><note type="content">Fig. 3: Combined energy spectrum of X bosons with mass MX=10 MeV from the SPS neutrino target and from the beam dump region at the NOMAD detector. The neutrino energy spectrum (hatched area) is also shown for comparison. The two spectra are arbitrarily normalized.</note><note type="content">Fig. 4: ECAL energy distributions for candidate events (shaded area) and for combined background events.</note><note type="content">Fig. 5: Total X boson flux at the NOMAD detector versus mass MX (EX>8GeV) calculated for Br(π0→γ+X)=1. The curve is a polynomial fit to the points.</note><note type="content">Fig. 6: 90% confidence level upper limit on branching Br(π0→γ+X) versus MX. The limit is valid for a lifetime of the X boson τX>10−9MX[MeV/c2] s.</note><note type="content">Table 1: Overall background estimate</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a">Search for a new gauge boson in π 0 decays</title><author><orgName>NOMAD Collaboration</orgName></author><author xml:id="author-2"><persName><forename type="first">J.</forename><surname>Altegoer</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-3"><persName><forename type="first">P.</forename><surname>Astier</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-4"><persName><forename type="first">D.</forename><surname>Autiero</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-5"><persName><forename type="first">A.</forename><surname>Baldisseri</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-6"><persName><forename type="first">M.</forename><surname>Baldo-Ceolin</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-7"><persName><forename type="first">G.</forename><surname>Ballocchi</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-8"><persName><forename type="first">M.</forename><surname>Banner</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-9"><persName><forename type="first">S.</forename><surname>Basa</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-10"><persName><forename type="first">G.</forename><surname>Bassompierre</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-11"><persName><forename type="first">K.</forename><surname>Benslama</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-12"><persName><forename type="first">N.</forename><surname>Besson</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-13"><persName><forename type="first">I.</forename><surname>Bird</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-14"><persName><forename type="first">B.</forename><surname>Blumenfeld</surname></persName><affiliation>Johns Hopkins Univ., Baltimore, MD, USA</affiliation></author><author xml:id="author-15"><persName><forename type="first">F.</forename><surname>Bobisut</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-16"><persName><forename type="first">J.</forename><surname>Bouchez</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-17"><persName><forename type="first">S.</forename><surname>Boyd</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation></author><author xml:id="author-18"><persName><forename type="first">A.</forename><surname>Bueno</surname></persName><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation></author><author xml:id="author-19"><persName><forename type="first">S.</forename><surname>Bunyatov</surname></persName><affiliation>JINR, Dubna, Russia</affiliation></author><author xml:id="author-20"><persName><forename type="first">L.</forename><surname>Camilleri</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-21"><persName><forename type="first">A.</forename><surname>Cardini</surname></persName><affiliation>UCLA, Los Angeles, CA, USA</affiliation></author><author xml:id="author-22"><persName><forename type="first">A.</forename><surname>Castera</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-23"><persName><forename type="first">P.W.</forename><surname>Cattaneo</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-24"><persName><forename type="first">V.</forename><surname>Cavasinni</surname></persName><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation></author><author xml:id="author-25"><persName><forename type="first">A.</forename><surname>Cervera-Villanueva</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-26"><persName><forename type="first">G.M.</forename><surname>Collazuol</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-27"><persName><forename type="first">G.</forename><surname>Conforto</surname></persName><affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</affiliation></author><author xml:id="author-28"><persName><forename type="first">C.</forename><surname>Conta</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-29"><persName><forename type="first">M.</forename><surname>Contalbrigo</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-30"><persName><forename type="first">R.</forename><surname>Cousins</surname></persName><affiliation>UCLA, Los Angeles, CA, USA</affiliation></author><author xml:id="author-31"><persName><forename type="first">D.</forename><surname>Daniels</surname></persName><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation></author><author xml:id="author-32"><persName><forename type="first">A.De</forename><surname>Santo</surname></persName><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation></author><author xml:id="author-33"><persName><forename type="first">T.Del</forename><surname>Prete</surname></persName><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation></author><author xml:id="author-34"><persName><forename type="first">T.</forename><surname>Dignan</surname></persName><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation></author><author xml:id="author-35"><persName><forename type="first">L.Di</forename><surname>Lella</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-36"><persName><forename type="first">E.</forename><surname>do Couto e Silva</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-37"><persName><forename type="first">I.J.</forename><surname>Donnelly</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation><affiliation>ANSTO,Sydney, Menai, Australia</affiliation></author><author xml:id="author-38"><persName><forename type="first">J.</forename><surname>Dumarchez</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-39"><persName><forename type="first">T.</forename><surname>Fazio</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-40"><persName><forename type="first">G.J.</forename><surname>Feldman</surname></persName><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation></author><author xml:id="author-41"><persName><forename type="first">R.</forename><surname>Ferrari</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-42"><persName><forename type="first">D.</forename><surname>Ferrère</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-43"><persName><forename type="first">V.</forename><surname>Flaminio</surname></persName><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation></author><author xml:id="author-44"><persName><forename type="first">M.</forename><surname>Fraternali</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-45"><persName><forename type="first">J-M.</forename><surname>Gaillard</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-46"><persName><forename type="first">P.</forename><surname>Galumian</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-47"><persName><forename type="first">E.</forename><surname>Gangler</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-48"><persName><forename type="first">A.</forename><surname>Geiser</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-49"><persName><forename type="first">D.</forename><surname>Geppert</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-50"><persName><forename type="first">D.</forename><surname>Gibin</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-51"><persName><forename type="first">S.N.</forename><surname>Gninenko</surname></persName><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation></author><author xml:id="author-52"><persName><forename type="first">J-J.</forename><surname>Gomez-Cadenas</surname></persName><affiliation>Univ. of Massachusetts, Amherst, MA, USA</affiliation><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-53"><persName><forename type="first">J.</forename><surname>Gosset</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-54"><persName><forename type="first">C.</forename><surname>Gößling</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-55"><persName><forename type="first">M.</forename><surname>Gouanère</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-56"><persName><forename type="first">A.</forename><surname>Grant</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-57"><persName><forename type="first">G.</forename><surname>Graziani</surname></persName><affiliation>Univ. of Florence and INFN, Florence, Italy</affiliation></author><author xml:id="author-58"><persName><forename type="first">A.</forename><surname>Guglielmi</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-59"><persName><forename type="first">C.</forename><surname>Hagner</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-60"><persName><forename type="first">J.</forename><surname>Hernando</surname></persName><affiliation>Univ. of Massachusetts, Amherst, MA, USA</affiliation><affiliation>1 Now at UCSC, Santa Cruz, CA, USA.</affiliation></author><author xml:id="author-61"><persName><forename type="first">D.</forename><surname>Hubbard</surname></persName><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation></author><author xml:id="author-62"><persName><forename type="first">P.</forename><surname>Hurst</surname></persName><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation></author><author xml:id="author-63"><persName><forename type="first">N.</forename><surname>Hyett</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-64"><persName><forename type="first">E.</forename><surname>Iacopini</surname></persName><affiliation>Univ. of Florence and INFN, Florence, Italy</affiliation></author><author xml:id="author-65"><persName><forename type="first">C.</forename><surname>Joseph</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-66"><persName><forename type="first">D.</forename><surname>Kekez</surname></persName><affiliation>Rudjer Bošković Institute, Zagreb, Croatia</affiliation></author><author xml:id="author-67"><persName><forename type="first">B.</forename><surname>Khomenko</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-68"><persName><forename type="first">M.M.</forename><surname>Kirsanov</surname></persName><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation></author><author xml:id="author-69"><persName><forename type="first">O.</forename><surname>Klimov</surname></persName><affiliation>JINR, Dubna, Russia</affiliation></author><author xml:id="author-70"><persName><forename type="first">J.</forename><surname>Kokkonen</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-71"><persName><forename type="first">A.V.</forename><surname>Kovzelev</surname></persName><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation></author><author xml:id="author-72"><persName><forename type="first">V.</forename><surname>Kuznetsov</surname></persName><affiliation>JINR, Dubna, Russia</affiliation></author><author xml:id="author-73"><persName><forename type="first">S.</forename><surname>Lacaprara</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-74"><persName><forename type="first">A.</forename><surname>Lanza</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-75"><persName><forename type="first">L.</forename><surname>La Rotonda</surname></persName><affiliation>Univ. of Calabria and INFN, Cosenza, Italy</affiliation></author><author xml:id="author-76"><persName><forename type="first">M.</forename><surname>Laveder</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-77"><persName><forename type="first">A.</forename><surname>Letessier-Selvon</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-78"><persName><forename type="first">J-M.</forename><surname>Levy</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-79"><persName><forename type="first">L.</forename><surname>Linssen</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-80"><persName><forename type="first">A.</forename><surname>Ljubičić</surname></persName><affiliation>Rudjer Bošković Institute, Zagreb, Croatia</affiliation></author><author xml:id="author-81"><persName><forename type="first">J.</forename><surname>Long</surname></persName><affiliation>Johns Hopkins Univ., Baltimore, MD, USA</affiliation><affiliation>2 Now at Univ. of Colorado, Boulder, CO, USA.</affiliation></author><author xml:id="author-82"><persName><forename type="first">A.</forename><surname>Lupi</surname></persName><affiliation>Univ. of Florence and INFN, Florence, Italy</affiliation></author><author xml:id="author-83"><persName><forename type="first">E.</forename><surname>Manola-Poggioli</surname></persName><affiliation>LAPP, Annecy, France</affiliation><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-84"><persName><forename type="first">A.</forename><surname>Marchionni</surname></persName><affiliation>Univ. of Florence and INFN, Florence, Italy</affiliation></author><author xml:id="author-85"><persName><forename type="first">F.</forename><surname>Martelli</surname></persName><affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</affiliation></author><author xml:id="author-86"><persName><forename type="first">X.</forename><surname>Méchain</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-87"><persName><forename type="first">J-P.</forename><surname>Mendiburu</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-88"><persName><forename type="first">J-P.</forename><surname>Meyer</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-89"><persName><forename type="first">M.</forename><surname>Mezzetto</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-90"><persName><forename type="first">S.R.</forename><surname>Mishra</surname></persName><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation></author><author xml:id="author-91"><persName><forename type="first">G.F.</forename><surname>Moorhead</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-92"><persName><forename type="first">L.</forename><surname>Mossuz</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-93"><persName><forename type="first">P.</forename><surname>Nédélec</surname></persName><affiliation>LAPP, Annecy, France</affiliation><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-94"><persName><forename type="first">Yu.</forename><surname>Nefedov</surname></persName><affiliation>JINR, Dubna, Russia</affiliation></author><author xml:id="author-95"><persName><forename type="first">C.</forename><surname>Nguyen-Mau</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-96"><persName><forename type="first">D.</forename><surname>Orestano</surname></persName><affiliation>Roma-III Univ., Rome, Italy</affiliation></author><author xml:id="author-97"><persName><forename type="first">F.</forename><surname>Pastore</surname></persName><affiliation>Roma-III Univ., Rome, Italy</affiliation></author><author xml:id="author-98"><persName><forename type="first">L.S.</forename><surname>Peak</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation></author><author xml:id="author-99"><persName><forename type="first">E.</forename><surname>Pennacchio</surname></persName><affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</affiliation></author><author xml:id="author-100"><persName><forename type="first">J-P.</forename><surname>Perroud</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-101"><persName><forename type="first">H.</forename><surname>Pessard</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-102"><persName><forename type="first">R.</forename><surname>Petti</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-103"><persName><forename type="first">A.</forename><surname>Placci</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-104"><persName><forename type="first">H.</forename><surname>Plothow-Besch</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-105"><persName><forename type="first">A.</forename><surname>Pluquet</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-106"><persName><forename type="first">G.</forename><surname>Polesello</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-107"><persName><forename type="first">D.</forename><surname>Pollmann</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-108"><persName><forename type="first">B.G.</forename><surname>Pope</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-109"><persName><forename type="first">B.</forename><surname>Popov</surname></persName><affiliation>JINR, Dubna, Russia</affiliation><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-110"><persName><forename type="first">C.</forename><surname>Poulsen</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-111"><persName><forename type="first">P.</forename><surname>Rathouit</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-112"><persName><forename type="first">C.</forename><surname>Roda</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation></author><author xml:id="author-113"><persName><forename type="first">A.</forename><surname>Rubbia</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-114"><persName><forename type="first">F.</forename><surname>Salvatore</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-115"><persName><forename type="first">D.</forename><surname>Scannicchio</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-116"><persName><forename type="first">K.</forename><surname>Schahmaneche</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-117"><persName><forename type="first">B.</forename><surname>Schmidt</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-118"><persName><forename type="first">A.</forename><surname>Sconza</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><author xml:id="author-119"><persName><forename type="first">M.</forename><surname>Serrano</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-120"><persName><forename type="first">M.E.</forename><surname>Sevior</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-121"><persName><forename type="first">D.</forename><surname>Sillou</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-122"><persName><forename type="first">F.J.P.</forename><surname>Soler</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation></author><author xml:id="author-123"><persName><forename type="first">G.</forename><surname>Sozzi</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-124"><persName><forename type="first">D.</forename><surname>Steele</surname></persName><affiliation>Johns Hopkins Univ., Baltimore, MD, USA</affiliation><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-125"><persName><forename type="first">P.</forename><surname>Steffen</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-126"><persName><forename type="first">M.</forename><surname>Steininger</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-127"><persName><forename type="first">U.</forename><surname>Stiegler</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-128"><persName><forename type="first">M.</forename><surname>Stipčević</surname></persName><affiliation>Rudjer Bošković Institute, Zagreb, Croatia</affiliation></author><author xml:id="author-129"><persName><forename type="first">T.</forename><surname>Stolarczyk</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-130"><persName><forename type="first">M.</forename><surname>Tareb-Reyes</surname></persName><affiliation>LAPP, Annecy, France</affiliation><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-131"><persName><forename type="first">G.N.</forename><surname>Taylor</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-132"><persName><forename type="first">S.</forename><surname>Tereshchenko</surname></persName><affiliation>JINR, Dubna, Russia</affiliation></author><author xml:id="author-133"><persName><forename type="first">A.N.</forename><surname>Toropin</surname></persName><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation></author><author xml:id="author-134"><persName><forename type="first">A-M.</forename><surname>Touchard</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-135"><persName><forename type="first">S.N.</forename><surname>Tovey</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-136"><persName><forename type="first">M-T.</forename><surname>Tran</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-137"><persName><forename type="first">E.</forename><surname>Tsesmelis</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-138"><persName><forename type="first">J.</forename><surname>Ulrichs</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation></author><author xml:id="author-139"><persName><forename type="first">V.</forename><surname>Uros</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-140"><persName><forename type="first">M.</forename><surname>Valdata-Nappi</surname></persName><affiliation>Univ. of Calabria and INFN, Cosenza, Italy</affiliation><affiliation>3 Now at Perugia Univ., Perugia, Italy.</affiliation></author><author xml:id="author-141"><persName><forename type="first">V.</forename><surname>Valuev</surname></persName><affiliation>JINR, Dubna, Russia</affiliation><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-142"><persName><forename type="first">F.</forename><surname>Vannucci</surname></persName><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation></author><author xml:id="author-143"><persName><forename type="first">K.E.</forename><surname>Varvell</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation><affiliation>ANSTO,Sydney, Menai, Australia</affiliation></author><author xml:id="author-144"><persName><forename type="first">M.</forename><surname>Veltri</surname></persName><affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</affiliation></author><author xml:id="author-145"><persName><forename type="first">V.</forename><surname>Vercesi</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-146"><persName><forename type="first">D.</forename><surname>Verkindt</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-147"><persName><forename type="first">J-M.</forename><surname>Vieira</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-148"><persName><forename type="first">T.</forename><surname>Vinogradova</surname></persName><affiliation>UCLA, Los Angeles, CA, USA</affiliation></author><author xml:id="author-149"><persName><forename type="first">M-K.</forename><surname>Vo</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-150"><persName><forename type="first">S.A.</forename><surname>Volkov</surname></persName><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation></author><author xml:id="author-151"><persName><forename type="first">F.</forename><surname>Weber</surname></persName><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation></author><author xml:id="author-152"><persName><forename type="first">T.</forename><surname>Weisse</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-153"><persName><forename type="first">M.</forename><surname>Werlen</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-154"><persName><forename type="first">F.</forename><surname>Wilson</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-155"><persName><forename type="first">L.J.</forename><surname>Winton</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-156"><persName><forename type="first">B.D.</forename><surname>Yabsley</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation></author><author xml:id="author-157"><persName><forename type="first">H.</forename><surname>Zaccone</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-158"><persName><forename type="first">K.</forename><surname>Zuber</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author></analytic><monogr><title level="j">Physics Letters B</title><title level="j" type="abbrev">PLB</title><idno type="pISSN">0370-2693</idno><idno type="PII">S0370-2693(00)X0168-2</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1998"></date><biblScope unit="volume">428</biblScope><biblScope unit="issue">1–2</biblScope><biblScope unit="page" from="197">197</biblScope><biblScope unit="page" to="205">205</biblScope></imprint></monogr><idno type="istex">3AD7310F741D3D1C2FF099745D79C94F53C93238</idno><idno type="DOI">10.1016/S0370-2693(98)00402-X</idno><idno type="PII">S0370-2693(98)00402-X</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1998</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>A search was made for a new light gauge boson X which might be produced in π0→γ+X decay from neutral pions generated by 450 GeV protons in the CERN SPS neutrino target. The X's would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect, in the process of X→π0 conversion in the external Coulomb field of a nucleus. With 1.45×1018 protons on target, 20 candidate events with energy between 8 and 140 GeV were found from the analysis of neutrino data. This number is in agreement with the expectation of 18.1±2.8 background events from standard neutrino processes. A new 90 %C.L. upper limit on the branching ratio Br(π0→γ+X)< (3.3 to 1.9)×10−5 for X masses ranging from 0 to 120 MeV/c2 is obtained.</p></abstract></profileDesc><revisionDesc><change when="1998">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/3AD7310F741D3D1C2FF099745D79C94F53C93238/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="gr1" NDATA="IMAGE" name="gr1"></istex:entity><istex:entity SYSTEM="gr2" NDATA="IMAGE" name="gr2"></istex:entity><istex:entity SYSTEM="gr3" NDATA="IMAGE" name="gr3"></istex:entity><istex:entity SYSTEM="gr4" NDATA="IMAGE" name="gr4"></istex:entity><istex:entity SYSTEM="gr5" NDATA="IMAGE" name="gr5"></istex:entity><istex:entity SYSTEM="gr6" NDATA="IMAGE" name="gr6"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla"><item-info><jid>PLB</jid><aid>12855</aid><ce:pii>S0370-2693(98)00402-X</ce:pii><ce:doi>10.1016/S0370-2693(98)00402-X</ce:doi><ce:copyright year="1998" type="full-transfer">Elsevier Science B.V.</ce:copyright></item-info><head><ce:title>Search for a new gauge boson in <ce:italic>π</ce:italic><ce:sup>0</ce:sup> decays</ce:title><ce:author-group><ce:collaboration><ce:text>NOMAD Collaboration</ce:text></ce:collaboration></ce:author-group><ce:author-group><ce:author><ce:given-name>J.</ce:given-name><ce:surname>Altegoer</ce:surname><ce:cross-ref refid="AFF6">f</ce:cross-ref></ce:author><ce:author><ce:given-name>P.</ce:given-name><ce:surname>Astier</ce:surname><ce:cross-ref 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refid="AFF9">i</ce:cross-ref></ce:author><ce:author><ce:given-name>A.</ce:given-name><ce:surname>Ljubičić</ce:surname><ce:cross-ref refid="AFF23">w</ce:cross-ref></ce:author><ce:author><ce:given-name>J.</ce:given-name><ce:surname>Long</ce:surname><ce:cross-ref refid="AFF3">c</ce:cross-ref><ce:cross-ref refid="FN2"><ce:sup>2</ce:sup></ce:cross-ref><ce:cross-ref refid="FN2"><ce:sup>2</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>A.</ce:given-name><ce:surname>Lupi</ce:surname><ce:cross-ref refid="AFF8">h</ce:cross-ref></ce:author><ce:author><ce:given-name>E.</ce:given-name><ce:surname>Manola-Poggioli</ce:surname><ce:cross-ref refid="AFF2">b</ce:cross-ref><ce:cross-ref refid="AFF9">i</ce:cross-ref></ce:author><ce:author><ce:given-name>A.</ce:given-name><ce:surname>Marchionni</ce:surname><ce:cross-ref refid="AFF8">h</ce:cross-ref></ce:author><ce:author><ce:given-name>F.</ce:given-name><ce:surname>Martelli</ce:surname><ce:cross-ref 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refid="FN3"><ce:sup>3</ce:sup></ce:cross-ref><ce:cross-ref refid="FN3"><ce:sup>3</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>V.</ce:given-name><ce:surname>Valuev</ce:surname><ce:cross-ref refid="AFF7">g</ce:cross-ref><ce:cross-ref refid="AFF2">b</ce:cross-ref></ce:author><ce:author><ce:given-name>F.</ce:given-name><ce:surname>Vannucci</ce:surname><ce:cross-ref refid="AFF15">o</ce:cross-ref></ce:author><ce:author><ce:given-name>K.E.</ce:given-name><ce:surname>Varvell</ce:surname><ce:cross-ref refid="AFF20">t</ce:cross-ref><ce:cross-ref refid="AFF21">u</ce:cross-ref></ce:author><ce:author><ce:given-name>M.</ce:given-name><ce:surname>Veltri</ce:surname><ce:cross-ref refid="AFF22">v</ce:cross-ref></ce:author><ce:author><ce:given-name>V.</ce:given-name><ce:surname>Vercesi</ce:surname><ce:cross-ref refid="AFF16">p</ce:cross-ref></ce:author><ce:author><ce:given-name>D.</ce:given-name><ce:surname>Verkindt</ce:surname><ce:cross-ref refid="AFF2">b</ce:cross-ref></ce:author><ce:author><ce:given-name>J-M.</ce:given-name><ce:surname>Vieira</ce:surname><ce:cross-ref refid="AFF10">j</ce:cross-ref></ce:author><ce:author><ce:given-name>T.</ce:given-name><ce:surname>Vinogradova</ce:surname><ce:cross-ref refid="AFF11">k</ce:cross-ref></ce:author><ce:author><ce:given-name>M-K.</ce:given-name><ce:surname>Vo</ce:surname><ce:cross-ref refid="AFF19">s</ce:cross-ref></ce:author><ce:author><ce:given-name>S.A.</ce:given-name><ce:surname>Volkov</ce:surname><ce:cross-ref refid="AFF13">m</ce:cross-ref></ce:author><ce:author><ce:given-name>F.</ce:given-name><ce:surname>Weber</ce:surname><ce:cross-ref refid="AFF4">d</ce:cross-ref></ce:author><ce:author><ce:given-name>T.</ce:given-name><ce:surname>Weisse</ce:surname><ce:cross-ref refid="AFF6">f</ce:cross-ref></ce:author><ce:author><ce:given-name>M.</ce:given-name><ce:surname>Werlen</ce:surname><ce:cross-ref refid="AFF10">j</ce:cross-ref></ce:author><ce:author><ce:given-name>F.</ce:given-name><ce:surname>Wilson</ce:surname><ce:cross-ref refid="AFF9">i</ce:cross-ref></ce:author><ce:author><ce:given-name>L.J.</ce:given-name><ce:surname>Winton</ce:surname><ce:cross-ref refid="AFF12">l</ce:cross-ref></ce:author><ce:author><ce:given-name>B.D.</ce:given-name><ce:surname>Yabsley</ce:surname><ce:cross-ref refid="AFF20">t</ce:cross-ref></ce:author><ce:author><ce:given-name>H.</ce:given-name><ce:surname>Zaccone</ce:surname><ce:cross-ref refid="AFF19">s</ce:cross-ref></ce:author><ce:author><ce:given-name>K.</ce:given-name><ce:surname>Zuber</ce:surname><ce:cross-ref refid="AFF6">f</ce:cross-ref></ce:author><ce:affiliation id="AFF1"><ce:label>a</ce:label><ce:textfn>Univ. of Massachusetts, Amherst, MA, USA</ce:textfn></ce:affiliation><ce:affiliation id="AFF2"><ce:label>b</ce:label><ce:textfn>LAPP, Annecy, France</ce:textfn></ce:affiliation><ce:affiliation id="AFF3"><ce:label>c</ce:label><ce:textfn>Johns Hopkins Univ., Baltimore, MD, USA</ce:textfn></ce:affiliation><ce:affiliation id="AFF4"><ce:label>d</ce:label><ce:textfn>Harvard Univ., Cambridge, MA, USA</ce:textfn></ce:affiliation><ce:affiliation id="AFF5"><ce:label>e</ce:label><ce:textfn>Univ. of Calabria and INFN, Cosenza, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF6"><ce:label>f</ce:label><ce:textfn>Dortmund Univ., Dortmund, Germany</ce:textfn></ce:affiliation><ce:affiliation id="AFF7"><ce:label>g</ce:label><ce:textfn>JINR, Dubna, Russia</ce:textfn></ce:affiliation><ce:affiliation id="AFF8"><ce:label>h</ce:label><ce:textfn>Univ. of Florence and INFN, Florence, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF9"><ce:label>i</ce:label><ce:textfn>CERN, Geneva, Switzerland</ce:textfn></ce:affiliation><ce:affiliation id="AFF10"><ce:label>j</ce:label><ce:textfn>University of Lausanne, Lausanne, Switzerland</ce:textfn></ce:affiliation><ce:affiliation id="AFF11"><ce:label>k</ce:label><ce:textfn>UCLA, Los Angeles, CA, USA</ce:textfn></ce:affiliation><ce:affiliation id="AFF12"><ce:label>l</ce:label><ce:textfn>University of Melbourne, Melbourne, Australia</ce:textfn></ce:affiliation><ce:affiliation id="AFF13"><ce:label>m</ce:label><ce:textfn>Institute for Nuclear Research, INR Moscow, Russia</ce:textfn></ce:affiliation><ce:affiliation id="AFF14"><ce:label>n</ce:label><ce:textfn>Univ. of Padova and INFN, Padova, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF15"><ce:label>o</ce:label><ce:textfn>LPNHE, Univ. of Paris, Paris VI and VII, France</ce:textfn></ce:affiliation><ce:affiliation id="AFF16"><ce:label>p</ce:label><ce:textfn>Univ. of Pavia and INFN, Pavia, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF17"><ce:label>q</ce:label><ce:textfn>Univ. of Pisa and INFN, Pisa, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF18"><ce:label>r</ce:label><ce:textfn>Roma-III Univ., Rome, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF19"><ce:label>s</ce:label><ce:textfn>DAPNIA, CEA Saclay, France</ce:textfn></ce:affiliation><ce:affiliation id="AFF20"><ce:label>t</ce:label><ce:textfn>Univ. of Sydney, Sydney, Australia</ce:textfn></ce:affiliation><ce:affiliation id="AFF21"><ce:label>u</ce:label><ce:textfn>ANSTO,Sydney, Menai, Australia</ce:textfn></ce:affiliation><ce:affiliation id="AFF22"><ce:label>v</ce:label><ce:textfn>Univ. of Urbino, Urbino, and INFN Florence, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF23"><ce:label>w</ce:label><ce:textfn>Rudjer Bošković Institute, Zagreb, Croatia</ce:textfn></ce:affiliation><ce:footnote id="FN1"><ce:label>1</ce:label><ce:note-para>Now at UCSC, Santa Cruz, CA, USA.</ce:note-para></ce:footnote><ce:footnote id="FN2"><ce:label>2</ce:label><ce:note-para>Now at Univ. of Colorado, Boulder, CO, USA.</ce:note-para></ce:footnote><ce:footnote id="FN3"><ce:label>3</ce:label><ce:note-para>Now at Perugia Univ., Perugia, Italy.</ce:note-para></ce:footnote></ce:author-group><ce:date-received day="30" month="3" year="1998"></ce:date-received><ce:miscellaneous>Editor: L. Montanet</ce:miscellaneous><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>A search was made for a new light gauge boson <ce:italic>X</ce:italic> which might be produced in <ce:italic>π</ce:italic><ce:sup>0</ce:sup>→<ce:italic>γ</ce:italic>+<ce:italic>X</ce:italic> decay from neutral pions generated by 450 GeV protons in the CERN SPS neutrino target. The X's would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect, in the process of <ce:italic>X</ce:italic>→<ce:italic>π</ce:italic><ce:sup>0</ce:sup> conversion in the external Coulomb field of a nucleus. With 1.45×10<ce:sup>18</ce:sup> protons on target, 20 candidate events with energy between 8 and 140 GeV were found from the analysis of neutrino data. This number is in agreement with the expectation of 18.1±2.8 background events from standard neutrino processes. A new 90 <math altimg="si2.gif">%<ce:hsp sp="0.3"></ce:hsp>C.L.</math> upper limit on the branching ratio <ce:italic>Br</ce:italic>(<ce:italic>π</ce:italic><ce:sup>0</ce:sup>→<ce:italic>γ</ce:italic>+<ce:italic>X</ce:italic>)< (3.3 to 1.9)×10<ce:sup>−5</ce:sup> for <ce:italic>X</ce:italic> masses ranging from 0 to 120 MeV/<ce:italic>c</ce:italic><ce:sup>2</ce:sup> is obtained.</ce:simple-para></ce:abstract-sec></ce:abstract></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo><title>Search for a new gauge boson in π 0 decays</title></titleInfo><titleInfo type="alternative" contentType="CDATA"><title>Search for a new gauge boson in</title></titleInfo><name type="corporate"><namePart>NOMAD Collaboration</namePart></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Altegoer</namePart><affiliation>Dortmund Univ., Dortmund, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Astier</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Autiero</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Baldisseri</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Baldo-Ceolin</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Ballocchi</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Banner</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Basa</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Bassompierre</namePart><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K.</namePart><namePart type="family">Benslama</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N.</namePart><namePart type="family">Besson</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">I.</namePart><namePart type="family">Bird</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B.</namePart><namePart type="family">Blumenfeld</namePart><affiliation>Johns Hopkins Univ., Baltimore, MD, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Bobisut</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Bouchez</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Boyd</namePart><affiliation>Univ. of Sydney, Sydney, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Bueno</namePart><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Bunyatov</namePart><affiliation>JINR, Dubna, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.</namePart><namePart type="family">Camilleri</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Cardini</namePart><affiliation>UCLA, Los Angeles, CA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Castera</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.W.</namePart><namePart type="family">Cattaneo</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V.</namePart><namePart type="family">Cavasinni</namePart><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Cervera-Villanueva</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.M.</namePart><namePart type="family">Collazuol</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Conforto</namePart><affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Conta</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Contalbrigo</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R.</namePart><namePart type="family">Cousins</namePart><affiliation>UCLA, Los Angeles, CA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Daniels</namePart><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.De</namePart><namePart type="family">Santo</namePart><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T.Del</namePart><namePart type="family">Prete</namePart><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T.</namePart><namePart type="family">Dignan</namePart><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.Di</namePart><namePart type="family">Lella</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E.</namePart><namePart type="family">do Couto e Silva</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">I.J.</namePart><namePart type="family">Donnelly</namePart><affiliation>Univ. of Sydney, Sydney, Australia</affiliation><affiliation>ANSTO,Sydney, Menai, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Dumarchez</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T.</namePart><namePart type="family">Fazio</namePart><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.J.</namePart><namePart type="family">Feldman</namePart><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R.</namePart><namePart type="family">Ferrari</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Ferrère</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V.</namePart><namePart type="family">Flaminio</namePart><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Fraternali</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J-M.</namePart><namePart type="family">Gaillard</namePart><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Galumian</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Gangler</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Geiser</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Geppert</namePart><affiliation>Dortmund Univ., Dortmund, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Gibin</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.N.</namePart><namePart type="family">Gninenko</namePart><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J-J.</namePart><namePart type="family">Gomez-Cadenas</namePart><affiliation>Univ. of Massachusetts, Amherst, MA, USA</affiliation><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Gosset</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Gößling</namePart><affiliation>Dortmund Univ., Dortmund, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Gouanère</namePart><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Grant</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Graziani</namePart><affiliation>Univ. of Florence and INFN, Florence, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Guglielmi</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Hagner</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Hernando</namePart><affiliation>Univ. of Massachusetts, Amherst, MA, USA</affiliation><affiliation>1 Now at UCSC, Santa Cruz, CA, USA.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Hubbard</namePart><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Hurst</namePart><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N.</namePart><namePart type="family">Hyett</namePart><affiliation>University of Melbourne, Melbourne, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Iacopini</namePart><affiliation>Univ. of Florence and INFN, Florence, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Joseph</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Kekez</namePart><affiliation>Rudjer Bošković Institute, Zagreb, Croatia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B.</namePart><namePart type="family">Khomenko</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.M.</namePart><namePart type="family">Kirsanov</namePart><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">O.</namePart><namePart type="family">Klimov</namePart><affiliation>JINR, Dubna, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Kokkonen</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.V.</namePart><namePart type="family">Kovzelev</namePart><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V.</namePart><namePart type="family">Kuznetsov</namePart><affiliation>JINR, Dubna, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Lacaprara</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Lanza</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.</namePart><namePart type="family">La Rotonda</namePart><affiliation>Univ. of Calabria and INFN, Cosenza, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Laveder</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Letessier-Selvon</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J-M.</namePart><namePart type="family">Levy</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.</namePart><namePart type="family">Linssen</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Ljubičić</namePart><affiliation>Rudjer Bošković Institute, Zagreb, Croatia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Long</namePart><affiliation>Johns Hopkins Univ., Baltimore, MD, USA</affiliation><affiliation>2 Now at Univ. of Colorado, Boulder, CO, USA.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Lupi</namePart><affiliation>Univ. of Florence and INFN, Florence, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Manola-Poggioli</namePart><affiliation>LAPP, Annecy, France</affiliation><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Marchionni</namePart><affiliation>Univ. of Florence and INFN, Florence, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Martelli</namePart><affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">X.</namePart><namePart type="family">Méchain</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J-P.</namePart><namePart type="family">Mendiburu</namePart><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J-P.</namePart><namePart type="family">Meyer</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Mezzetto</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.R.</namePart><namePart type="family">Mishra</namePart><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.F.</namePart><namePart type="family">Moorhead</namePart><affiliation>University of Melbourne, Melbourne, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.</namePart><namePart type="family">Mossuz</namePart><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Nédélec</namePart><affiliation>LAPP, Annecy, France</affiliation><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Yu.</namePart><namePart type="family">Nefedov</namePart><affiliation>JINR, Dubna, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Nguyen-Mau</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Orestano</namePart><affiliation>Roma-III Univ., Rome, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Pastore</namePart><affiliation>Roma-III Univ., Rome, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.S.</namePart><namePart type="family">Peak</namePart><affiliation>Univ. of Sydney, Sydney, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Pennacchio</namePart><affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J-P.</namePart><namePart type="family">Perroud</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H.</namePart><namePart type="family">Pessard</namePart><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R.</namePart><namePart type="family">Petti</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Placci</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H.</namePart><namePart type="family">Plothow-Besch</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Pluquet</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Polesello</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Pollmann</namePart><affiliation>Dortmund Univ., Dortmund, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B.G.</namePart><namePart type="family">Pope</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B.</namePart><namePart type="family">Popov</namePart><affiliation>JINR, Dubna, Russia</affiliation><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Poulsen</namePart><affiliation>University of Melbourne, Melbourne, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Rathouit</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Roda</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>Univ. of Pisa and INFN, Pisa, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Rubbia</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Salvatore</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Scannicchio</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K.</namePart><namePart type="family">Schahmaneche</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B.</namePart><namePart type="family">Schmidt</namePart><affiliation>Dortmund Univ., Dortmund, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Sconza</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Serrano</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.E.</namePart><namePart type="family">Sevior</namePart><affiliation>University of Melbourne, Melbourne, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Sillou</namePart><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.J.P.</namePart><namePart type="family">Soler</namePart><affiliation>Univ. of Sydney, Sydney, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Sozzi</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Steele</namePart><affiliation>Johns Hopkins Univ., Baltimore, MD, USA</affiliation><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Steffen</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Steininger</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">U.</namePart><namePart type="family">Stiegler</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Stipčević</namePart><affiliation>Rudjer Bošković Institute, Zagreb, Croatia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T.</namePart><namePart type="family">Stolarczyk</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Tareb-Reyes</namePart><affiliation>LAPP, Annecy, France</affiliation><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.N.</namePart><namePart type="family">Taylor</namePart><affiliation>University of Melbourne, Melbourne, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Tereshchenko</namePart><affiliation>JINR, Dubna, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.N.</namePart><namePart type="family">Toropin</namePart><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A-M.</namePart><namePart type="family">Touchard</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.N.</namePart><namePart type="family">Tovey</namePart><affiliation>University of Melbourne, Melbourne, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M-T.</namePart><namePart type="family">Tran</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Tsesmelis</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Ulrichs</namePart><affiliation>Univ. of Sydney, Sydney, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V.</namePart><namePart type="family">Uros</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Valdata-Nappi</namePart><affiliation>Univ. of Calabria and INFN, Cosenza, Italy</affiliation><affiliation>3 Now at Perugia Univ., Perugia, Italy.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V.</namePart><namePart type="family">Valuev</namePart><affiliation>JINR, Dubna, Russia</affiliation><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Vannucci</namePart><affiliation>LPNHE, Univ. of Paris, Paris VI and VII, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K.E.</namePart><namePart type="family">Varvell</namePart><affiliation>Univ. of Sydney, Sydney, Australia</affiliation><affiliation>ANSTO,Sydney, Menai, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Veltri</namePart><affiliation>Univ. of Urbino, Urbino, and INFN Florence, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V.</namePart><namePart type="family">Vercesi</namePart><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Verkindt</namePart><affiliation>LAPP, Annecy, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J-M.</namePart><namePart type="family">Vieira</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T.</namePart><namePart type="family">Vinogradova</namePart><affiliation>UCLA, Los Angeles, CA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M-K.</namePart><namePart type="family">Vo</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.A.</namePart><namePart type="family">Volkov</namePart><affiliation>Institute for Nuclear Research, INR Moscow, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Weber</namePart><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T.</namePart><namePart type="family">Weisse</namePart><affiliation>Dortmund Univ., Dortmund, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Werlen</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Wilson</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.J.</namePart><namePart type="family">Winton</namePart><affiliation>University of Melbourne, Melbourne, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B.D.</namePart><namePart type="family">Yabsley</namePart><affiliation>Univ. of Sydney, Sydney, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H.</namePart><namePart type="family">Zaccone</namePart><affiliation>DAPNIA, CEA Saclay, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K.</namePart><namePart type="family">Zuber</namePart><affiliation>Dortmund Univ., Dortmund, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-1JC4F85T-7">research-article</genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1998</dateIssued><copyrightDate encoding="w3cdtf">1998</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><abstract lang="en">Abstract: A search was made for a new light gauge boson X which might be produced in π0→γ+X decay from neutral pions generated by 450 GeV protons in the CERN SPS neutrino target. The X's would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect, in the process of X→π0 conversion in the external Coulomb field of a nucleus. With 1.45×1018 protons on target, 20 candidate events with energy between 8 and 140 GeV were found from the analysis of neutrino data. This number is in agreement with the expectation of 18.1±2.8 background events from standard neutrino processes. A new 90 %C.L. upper limit on the branching ratio Br(π0→γ+X)< (3.3 to 1.9)×10−5 for X masses ranging from 0 to 120 MeV/c2 is obtained.</abstract><note>Editor: L. Montanet</note><note type="content">Fig. 1: Side view of the NOMAD detector.</note><note type="content">Fig. 2: Feynman diagram for π0 production by Primakoff effect.</note><note type="content">Fig. 3: Combined energy spectrum of X bosons with mass MX=10 MeV from the SPS neutrino target and from the beam dump region at the NOMAD detector. The neutrino energy spectrum (hatched area) is also shown for comparison. The two spectra are arbitrarily normalized.</note><note type="content">Fig. 4: ECAL energy distributions for candidate events (shaded area) and for combined background events.</note><note type="content">Fig. 5: Total X boson flux at the NOMAD detector versus mass MX (EX>8GeV) calculated for Br(π0→γ+X)=1. The curve is a polynomial fit to the points.</note><note type="content">Fig. 6: 90% confidence level upper limit on branching Br(π0→γ+X) versus MX. The limit is valid for a lifetime of the X boson τX>10−9MX[MeV/c2] s.</note><note type="content">Table 1: Overall background estimate</note><relatedItem type="host"><titleInfo><title>Physics Letters B</title></titleInfo><titleInfo type="abbreviated"><title>PLB</title></titleInfo><genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">19980528</dateIssued></originInfo><identifier type="ISSN">0370-2693</identifier><identifier type="PII">S0370-2693(00)X0168-2</identifier><part><date>19980528</date><detail type="volume"><number>428</number><caption>vol.</caption></detail><detail type="issue"><number>1–2</number><caption>no.</caption></detail><extent unit="issue-pages"><start>1</start><end>220</end></extent><extent unit="pages"><start>197</start><end>205</end></extent></part></relatedItem><identifier type="istex">3AD7310F741D3D1C2FF099745D79C94F53C93238</identifier><identifier type="ark">ark:/67375/6H6-J6MMSZZR-3</identifier><identifier type="DOI">10.1016/S0370-2693(98)00402-X</identifier><identifier type="PII">S0370-2693(98)00402-X</identifier><accessCondition type="use and reproduction" contentType="copyright">©1998 Elsevier Science B.V.</accessCondition><recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-HKKZVM7B-M">elsevier</recordContentSource><recordOrigin>Elsevier Science B.V., ©1998</recordOrigin></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/3AD7310F741D3D1C2FF099745D79C94F53C93238/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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