Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam
Identifieur interne : 001846 ( Istex/Corpus ); précédent : 001845; suivant : 001847Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam
Auteurs : P. Astier ; D. Autiero ; A. Baldisseri ; M. Baldo-Ceolin ; G. Ballocchi ; M. Banner ; G. Bassompierre ; K. Benslama ; N. Besson ; I. Bird ; B. Blumenfeld ; F. Bobisut ; J. Bouchez ; S. Boyd ; A. Bueno ; S. Bunyatov ; L. Camilleri ; A. Cardini ; P. W. Cattaneo ; V. Cavasinni ; A. Cervera-Villanueva ; G. Collazuol ; G. Conforto ; C. Conta ; M. Contalbrigo ; R. Cousins ; D. Daniels ; H. Degaudenzi ; T. Del Prete ; A. De Santo ; T. Dignan ; L. Di Lella ; E. Do Couto E Silva ; J. Dumarchez ; M. Ellis ; G. J. Feldman ; R. Ferrari ; D. Ferrère ; V. Flaminio ; M. Fraternali ; J.-M. Gaillard ; E. Gangler ; A. Geiser ; D. Geppert ; D. Gibin ; S. N. Gninenko ; A. Godley ; 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 ; F. Juget ; M. M. Kirsanov ; O. Klimov ; J. Kokkonen ; A. V. Kovzelev ; N. V. Krasnikov ; A. Krasnoperov ; V. E. Kuznetsov ; S. Lacaprara ; C. Lachaud ; B. Laki ; A. Lanza ; L. La Rotonda ; M. Laveder ; A. Letessier-Selvon ; J.-M. Levy ; L. Linssen ; A. Ljubi I ; J. Long ; A. Lupi ; 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 ; H. Pessard ; R. Petti ; A. Placci ; G. Polesello ; D. Pollmann ; A. Yu. Polyarush ; B. Popov ; C. Poulsen ; J. Rico ; C. Roda ; A. Rubbia ; F. Salvatore ; K. Schahmaneche ; B. Schmidt ; T. Schmidt ; M. Sevior ; D. Sillou ; F. J. P. Soler ; G. Sozzi ; D. Steele ; M. Steininger ; U. Stiegler ; M. Stip Evi ; Th. Stolarczyk ; M. Tareb-Reyes ; G. N. Taylor ; V. Tereshchenko ; A. N. Toropin ; A.-M. Touchard ; S. N. Tovey ; M.-T. Tran ; E. Tsesmelis ; J. Ulrichs ; L. Vacavant ; M. Valdata-Nappi ; V. Valuev ; F. Vannucci ; K. E. Varvell ; M. Veltri ; V. Vercesi ; D. Verkindt ; J.-M. Vieira ; T. Vinogradova ; S. A. Volkov ; F. V. Weber ; T. Weisse ; F. F. Wilson ; L. J. Winton ; B. D. Yabsley ; H. Zaccone ; K. Zioutas ; K. Zuber ; P. ZucconSource :
- Physics Letters B [ 0370-2693 ] ; 2000.
English descriptors
- KwdEn :
- Astier, Axion, Axion mass, Axion masses, Background events, Candidate events, Cern, Cleo collaboration, Detector, Ecal, Energy spectra, Energy spectrum, Gevy1, Infn, Instr, Lett, Magnetic field, Mass range, Meth, Muon, Neutrino, Neutrino beam, Neutrino interactions, Neutrino target, Nomad, Nomad detector, Nomad fiducial area, Nomad neutrino detector, Nucl, Photon, Photon conversion, Phys, Physics letters, Selection criteria, Upper limit, Virtual photons, Wanf, Wanf horn.
- Teeft :
- Astier, Axion, Axion mass, Axion masses, Background events, Candidate events, Cern, Cleo collaboration, Detector, Ecal, Energy spectra, Energy spectrum, Gevy1, Infn, Instr, Lett, Magnetic field, Mass range, Meth, Muon, Neutrino, Neutrino beam, Neutrino interactions, Neutrino target, Nomad, Nomad detector, Nomad fiducial area, Nomad neutrino detector, Nucl, Photon, Photon conversion, Phys, Physics letters, Selection criteria, Upper limit, Virtual photons, Wanf, Wanf horn.
Abstract
Abstract: We carried out a model-independent search for light scalar or pseudoscalar particles a's (an example of which is the axion) that couple to two photons by using a photon-regeneration method at high energies allowing a substantial increase in the sensitivity to eV masses. The experimental set-up is based on elements of the CERN West Area Neutrino Facility (WANF) beam line and the NOMAD neutrino detector. The new particles, if they exist, could be produced through the Primakoff effect in interactions of high energy photons, generated by the 450 GeV protons in the CERN SPS neutrino target, with virtual photons from the WANF horn magnetic field. The particles would penetrate the downstream shielding and would be observed in the NOMAD neutrino detector through their re-conversion into real high energy photons by interacting with the virtual photons from the magnetic field of the NOMAD dipole magnet. From the analysis of the data collected during the 1996 run with 1.08×1019 protons on target, 312 candidate events with energy between 5 and 140 GeV were found. This number is in general agreement with the expectation of 272±18 background events from standard neutrino processes. A 90 %CL upper limit on the aγγ-coupling gaγγ< 1.5×10−4GeV−1 for a masses up to 40 eV is obtained.
Url:
DOI: 10.1016/S0370-2693(00)00375-0
Links to Exploration step
ISTEX:813D5FBBAF478A296BDE7144C09BF2758D8CBBE3Le document en format XML
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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 VI and VII, Paris, France</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>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="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" sort="Collazuol, G" uniqKey="Collazuol G" first="G." last="Collazuol">G. 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>CERN, Geneva, Switzerland</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="Degaudenzi, H" sort="Degaudenzi, H" uniqKey="Degaudenzi H" first="H." last="Degaudenzi">H. Degaudenzi</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Del Prete, T" sort="Del Prete, T" uniqKey="Del Prete T" first="T." last="Del Prete">T. Del Prete</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="De Santo, A" sort="De Santo, A" uniqKey="De Santo A" first="A." last="De Santo">A. De Santo</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</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="Di Lella, L" sort="Di Lella, L" uniqKey="Di Lella L" first="L." last="Di 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="Dumarchez, J" sort="Dumarchez, J" uniqKey="Dumarchez J" first="J." last="Dumarchez">J. Dumarchez</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris VI and VII, Paris, France</mods:affiliation></affiliation></author><author><name sortKey="Ellis, M" sort="Ellis, M" uniqKey="Ellis M" first="M." last="Ellis">M. Ellis</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</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="Gangler, E" sort="Gangler, E" uniqKey="Gangler E" first="E." last="Gangler">E. Gangler</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</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>Dortmund Univ., Dortmund, Germany</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>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Godley, A" sort="Godley, A" uniqKey="Godley A" first="A." last="Godley">A. Godley</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</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>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>IFIC, Valencia, Spain</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="Juget, F" sort="Juget, F" uniqKey="Juget F" first="F." last="Juget">F. Juget</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, 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>Inst. Nucl. 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>Inst. Nucl. Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Krasnikov, N V" sort="Krasnikov, N V" uniqKey="Krasnikov N" first="N. V." last="Krasnikov">N. V. Krasnikov</name><affiliation><mods:affiliation>Inst. Nucl. Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Krasnoperov, A" sort="Krasnoperov, A" uniqKey="Krasnoperov A" first="A." last="Krasnoperov">A. Krasnoperov</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Kuznetsov, V E" sort="Kuznetsov, V E" uniqKey="Kuznetsov V" first="V. E." last="Kuznetsov">V. E. 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="Lachaud, C" sort="Lachaud, C" uniqKey="Lachaud C" first="C." last="Lachaud">C. Lachaud</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris VI and VII, Paris, France</mods:affiliation></affiliation></author><author><name sortKey="Laki, B" sort="Laki, B" uniqKey="Laki B" first="B." last="Laki">B. Laki</name><affiliation><mods:affiliation>Rudjer Bošković Institute, Zagreb, Croatia</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 VI and VII, Paris, 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 VI and VII, Paris, 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></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="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></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 Tre University and INFN, 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 Tre University and INFN, 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="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="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="Polyarush, A Yu" sort="Polyarush, A Yu" uniqKey="Polyarush A" first="A. Yu." last="Polyarush">A. Yu. Polyarush</name><affiliation><mods:affiliation>Inst. Nucl. Research, INR Moscow, Russia</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></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="Rico, J" sort="Rico, J" uniqKey="Rico J" first="J." last="Rico">J. Rico</name><affiliation><mods:affiliation>ETH Zürich, Zürich, Switzerland</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></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="Schahmaneche, K" sort="Schahmaneche, K" uniqKey="Schahmaneche K" first="K." last="Schahmaneche">K. Schahmaneche</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris VI and VII, Paris, 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="Schmidt, T" sort="Schmidt, T" uniqKey="Schmidt T" first="T." last="Schmidt">T. Schmidt</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Sevior, M" sort="Sevior, M" uniqKey="Sevior M" first="M." last="Sevior">M. 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>CERN, Geneva, Switzerland</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></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, Th" sort="Stolarczyk, Th" uniqKey="Stolarczyk T" first="Th." last="Stolarczyk">Th. 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>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, V" sort="Tereshchenko, V" uniqKey="Tereshchenko V" first="V." last="Tereshchenko">V. 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>Inst. Nucl. 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 VI and VII, Paris, 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>CERN, Geneva, Switzerland</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="Vacavant, L" sort="Vacavant, L" uniqKey="Vacavant L" first="L." last="Vacavant">L. Vacavant</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</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></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></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 VI and VII, Paris, 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></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="Volkov, S A" sort="Volkov, S A" uniqKey="Volkov S" first="S. A." last="Volkov">S. A. Volkov</name><affiliation><mods:affiliation>Inst. Nucl. Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Weber, F V" sort="Weber, F V" uniqKey="Weber F" first="F. V." last="Weber">F. V. 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="Wilson, F F" sort="Wilson, F F" uniqKey="Wilson F" first="F. F." last="Wilson">F. 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="Zioutas, K" sort="Zioutas, K" uniqKey="Zioutas K" first="K." last="Zioutas">K. Zioutas</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</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><author><name sortKey="Zuccon, P" sort="Zuccon, P" uniqKey="Zuccon P" first="P." last="Zuccon">P. Zuccon</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:813D5FBBAF478A296BDE7144C09BF2758D8CBBE3</idno><date when="2000" year="2000">2000</date><idno type="doi">10.1016/S0370-2693(00)00375-0</idno><idno type="url">https://api.istex.fr/document/813D5FBBAF478A296BDE7144C09BF2758D8CBBE3/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001846</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001846</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam</title><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 VI and VII, Paris, 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 VI and VII, Paris, France</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>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="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" sort="Collazuol, G" uniqKey="Collazuol G" first="G." last="Collazuol">G. 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>CERN, Geneva, Switzerland</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="Degaudenzi, H" sort="Degaudenzi, H" uniqKey="Degaudenzi H" first="H." last="Degaudenzi">H. Degaudenzi</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Del Prete, T" sort="Del Prete, T" uniqKey="Del Prete T" first="T." last="Del Prete">T. Del Prete</name><affiliation><mods:affiliation>Univ. of Pisa and INFN, Pisa, Italy</mods:affiliation></affiliation></author><author><name sortKey="De Santo, A" sort="De Santo, A" uniqKey="De Santo A" first="A." last="De Santo">A. De Santo</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</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="Di Lella, L" sort="Di Lella, L" uniqKey="Di Lella L" first="L." last="Di 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="Dumarchez, J" sort="Dumarchez, J" uniqKey="Dumarchez J" first="J." last="Dumarchez">J. Dumarchez</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris VI and VII, Paris, France</mods:affiliation></affiliation></author><author><name sortKey="Ellis, M" sort="Ellis, M" uniqKey="Ellis M" first="M." last="Ellis">M. Ellis</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</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="Gangler, E" sort="Gangler, E" uniqKey="Gangler E" first="E." last="Gangler">E. Gangler</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</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>Dortmund Univ., Dortmund, Germany</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>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Godley, A" sort="Godley, A" uniqKey="Godley A" first="A." last="Godley">A. Godley</name><affiliation><mods:affiliation>Univ. of Sydney, Sydney, Australia</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>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>IFIC, Valencia, Spain</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="Juget, F" sort="Juget, F" uniqKey="Juget F" first="F." last="Juget">F. Juget</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, 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>Inst. Nucl. 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>Inst. Nucl. Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Krasnikov, N V" sort="Krasnikov, N V" uniqKey="Krasnikov N" first="N. V." last="Krasnikov">N. V. Krasnikov</name><affiliation><mods:affiliation>Inst. Nucl. Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Krasnoperov, A" sort="Krasnoperov, A" uniqKey="Krasnoperov A" first="A." last="Krasnoperov">A. Krasnoperov</name><affiliation><mods:affiliation>LAPP, Annecy, France</mods:affiliation></affiliation></author><author><name sortKey="Kuznetsov, V E" sort="Kuznetsov, V E" uniqKey="Kuznetsov V" first="V. E." last="Kuznetsov">V. E. 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="Lachaud, C" sort="Lachaud, C" uniqKey="Lachaud C" first="C." last="Lachaud">C. Lachaud</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris VI and VII, Paris, France</mods:affiliation></affiliation></author><author><name sortKey="Laki, B" sort="Laki, B" uniqKey="Laki B" first="B." last="Laki">B. Laki</name><affiliation><mods:affiliation>Rudjer Bošković Institute, Zagreb, Croatia</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 VI and VII, Paris, 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 VI and VII, Paris, 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></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="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></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 Tre University and INFN, 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 Tre University and INFN, 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="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="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="Polyarush, A Yu" sort="Polyarush, A Yu" uniqKey="Polyarush A" first="A. Yu." last="Polyarush">A. Yu. Polyarush</name><affiliation><mods:affiliation>Inst. Nucl. Research, INR Moscow, Russia</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></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="Rico, J" sort="Rico, J" uniqKey="Rico J" first="J." last="Rico">J. Rico</name><affiliation><mods:affiliation>ETH Zürich, Zürich, Switzerland</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></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="Schahmaneche, K" sort="Schahmaneche, K" uniqKey="Schahmaneche K" first="K." last="Schahmaneche">K. Schahmaneche</name><affiliation><mods:affiliation>LPNHE, Univ. of Paris VI and VII, Paris, 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="Schmidt, T" sort="Schmidt, T" uniqKey="Schmidt T" first="T." last="Schmidt">T. Schmidt</name><affiliation><mods:affiliation>Dortmund Univ., Dortmund, Germany</mods:affiliation></affiliation></author><author><name sortKey="Sevior, M" sort="Sevior, M" uniqKey="Sevior M" first="M." last="Sevior">M. 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>CERN, Geneva, Switzerland</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></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, Th" sort="Stolarczyk, Th" uniqKey="Stolarczyk T" first="Th." last="Stolarczyk">Th. 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>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, V" sort="Tereshchenko, V" uniqKey="Tereshchenko V" first="V." last="Tereshchenko">V. 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>Inst. Nucl. 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 VI and VII, Paris, 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>CERN, Geneva, Switzerland</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="Vacavant, L" sort="Vacavant, L" uniqKey="Vacavant L" first="L." last="Vacavant">L. Vacavant</name><affiliation><mods:affiliation>University of Lausanne, Lausanne, Switzerland</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></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></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 VI and VII, Paris, 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></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="Volkov, S A" sort="Volkov, S A" uniqKey="Volkov S" first="S. A." last="Volkov">S. A. Volkov</name><affiliation><mods:affiliation>Inst. Nucl. Research, INR Moscow, Russia</mods:affiliation></affiliation></author><author><name sortKey="Weber, F V" sort="Weber, F V" uniqKey="Weber F" first="F. V." last="Weber">F. V. 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="Wilson, F F" sort="Wilson, F F" uniqKey="Wilson F" first="F. F." last="Wilson">F. 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="Zioutas, K" sort="Zioutas, K" uniqKey="Zioutas K" first="K." last="Zioutas">K. Zioutas</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</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><author><name sortKey="Zuccon, P" sort="Zuccon, P" uniqKey="Zuccon P" first="P." last="Zuccon">P. Zuccon</name><affiliation><mods:affiliation>Univ. of Padova and INFN, Padova, Italy</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="2000">2000</date><biblScope unit="volume">479</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="371">371</biblScope><biblScope unit="page" to="380">380</biblScope></imprint><idno type="ISSN">0370-2693</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0370-2693</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Astier</term><term>Axion</term><term>Axion mass</term><term>Axion masses</term><term>Background events</term><term>Candidate events</term><term>Cern</term><term>Cleo collaboration</term><term>Detector</term><term>Ecal</term><term>Energy spectra</term><term>Energy spectrum</term><term>Gevy1</term><term>Infn</term><term>Instr</term><term>Lett</term><term>Magnetic field</term><term>Mass range</term><term>Meth</term><term>Muon</term><term>Neutrino</term><term>Neutrino beam</term><term>Neutrino interactions</term><term>Neutrino target</term><term>Nomad</term><term>Nomad detector</term><term>Nomad fiducial area</term><term>Nomad neutrino detector</term><term>Nucl</term><term>Photon</term><term>Photon conversion</term><term>Phys</term><term>Physics letters</term><term>Selection criteria</term><term>Upper limit</term><term>Virtual photons</term><term>Wanf</term><term>Wanf horn</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Astier</term><term>Axion</term><term>Axion mass</term><term>Axion masses</term><term>Background events</term><term>Candidate events</term><term>Cern</term><term>Cleo collaboration</term><term>Detector</term><term>Ecal</term><term>Energy spectra</term><term>Energy spectrum</term><term>Gevy1</term><term>Infn</term><term>Instr</term><term>Lett</term><term>Magnetic field</term><term>Mass range</term><term>Meth</term><term>Muon</term><term>Neutrino</term><term>Neutrino beam</term><term>Neutrino interactions</term><term>Neutrino target</term><term>Nomad</term><term>Nomad detector</term><term>Nomad fiducial area</term><term>Nomad neutrino detector</term><term>Nucl</term><term>Photon</term><term>Photon conversion</term><term>Phys</term><term>Physics letters</term><term>Selection criteria</term><term>Upper limit</term><term>Virtual photons</term><term>Wanf</term><term>Wanf horn</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: We carried out a model-independent search for light scalar or pseudoscalar particles a's (an example of which is the axion) that couple to two photons by using a photon-regeneration method at high energies allowing a substantial increase in the sensitivity to eV masses. The experimental set-up is based on elements of the CERN West Area Neutrino Facility (WANF) beam line and the NOMAD neutrino detector. The new particles, if they exist, could be produced through the Primakoff effect in interactions of high energy photons, generated by the 450 GeV protons in the CERN SPS neutrino target, with virtual photons from the WANF horn magnetic field. The particles would penetrate the downstream shielding and would be observed in the NOMAD neutrino detector through their re-conversion into real high energy photons by interacting with the virtual photons from the magnetic field of the NOMAD dipole magnet. From the analysis of the data collected during the 1996 run with 1.08×1019 protons on target, 312 candidate events with energy between 5 and 140 GeV were found. This number is in general agreement with the expectation of 272±18 background events from standard neutrino processes. A 90 %CL upper limit on the aγγ-coupling gaγγ< 1.5×10−4GeV−1 for a masses up to 40 eV is obtained.</div></front></TEI><istex><corpusName>elsevier</corpusName><keywords><teeft><json:string>photon</json:string><json:string>phys</json:string><json:string>nomad</json:string><json:string>neutrino</json:string><json:string>axion</json:string><json:string>ecal</json:string><json:string>lett</json:string><json:string>nucl</json:string><json:string>nomad detector</json:string><json:string>physics letters</json:string><json:string>astier</json:string><json:string>wanf</json:string><json:string>cern</json:string><json:string>meth</json:string><json:string>instr</json:string><json:string>infn</json:string><json:string>muon</json:string><json:string>gevy1</json:string><json:string>neutrino target</json:string><json:string>candidate events</json:string><json:string>magnetic field</json:string><json:string>upper limit</json:string><json:string>energy spectrum</json:string><json:string>virtual photons</json:string><json:string>neutrino interactions</json:string><json:string>photon conversion</json:string><json:string>detector</json:string><json:string>background events</json:string><json:string>mass range</json:string><json:string>cleo collaboration</json:string><json:string>nomad fiducial area</json:string><json:string>axion mass</json:string><json:string>axion masses</json:string><json:string>selection criteria</json:string><json:string>neutrino beam</json:string><json:string>nomad neutrino detector</json:string><json:string>wanf horn</json:string><json:string>energy spectra</json:string></teeft></keywords><author><json:item><name>P. Astier</name><affiliations><json:string>LPNHE, Univ. of Paris VI and VII, Paris, 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 VI and VII, Paris, France</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>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>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. 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>CERN, Geneva, Switzerland</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>H. Degaudenzi</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</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>A. De Santo</name><affiliations><json:string>CERN, Geneva, Switzerland</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>J. Dumarchez</name><affiliations><json:string>LPNHE, Univ. of Paris VI and VII, Paris, France</json:string></affiliations></json:item><json:item><name>M. Ellis</name><affiliations><json:string>Univ. of Sydney, Sydney, Australia</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>E. Gangler</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>A. Geiser</name><affiliations><json:string>Dortmund Univ., Dortmund, Germany</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>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>A. Godley</name><affiliations><json:string>Univ. of Sydney, Sydney, Australia</json:string></affiliations></json:item><json:item><name>J.-J. Gomez-Cadenas</name><affiliations><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>IFIC, Valencia, Spain</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>F. Juget</name><affiliations><json:string>University of Lausanne, Lausanne, Switzerland</json:string></affiliations></json:item><json:item><name>M.M. Kirsanov</name><affiliations><json:string>Inst. Nucl. Research, INR Moscow, Russia</json:string></affiliations></json:item><json:item><name>O. 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Vinogradova</name><affiliations><json:string>UCLA, Los Angeles, CA, USA</json:string></affiliations></json:item><json:item><name>S.A. Volkov</name><affiliations><json:string>Inst. Nucl. Research, INR Moscow, Russia</json:string></affiliations></json:item><json:item><name>F.V. 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>F.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. Zioutas</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>K. Zuber</name><affiliations><json:string>Dortmund Univ., Dortmund, Germany</json:string></affiliations></json:item><json:item><name>P. Zuccon</name><affiliations><json:string>Univ. of Padova and INFN, Padova, Italy</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Experiments</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Light (pseudo)scalars</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Photon-regeneration</value></json:item></subject><arkIstex>ark:/67375/6H6-B4ZJ56G3-Z</arkIstex><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>Abstract: We carried out a model-independent search for light scalar or pseudoscalar particles a's (an example of which is the axion) that couple to two photons by using a photon-regeneration method at high energies allowing a substantial increase in the sensitivity to eV masses. The experimental set-up is based on elements of the CERN West Area Neutrino Facility (WANF) beam line and the NOMAD neutrino detector. The new particles, if they exist, could be produced through the Primakoff effect in interactions of high energy photons, generated by the 450 GeV protons in the CERN SPS neutrino target, with virtual photons from the WANF horn magnetic field. The particles would penetrate the downstream shielding and would be observed in the NOMAD neutrino detector through their re-conversion into real high energy photons by interacting with the virtual photons from the magnetic field of the NOMAD dipole magnet. From the analysis of the data collected during the 1996 run with 1.08×1019 protons on target, 312 candidate events with energy between 5 and 140 GeV were found. This number is in general agreement with the expectation of 272±18 background events from standard neutrino processes. A 90 %CL upper limit on the aγγ-coupling gaγγ> 1.5×10−4GeV−1 for a masses up to 40 eV is obtained.</abstract><qualityIndicators><refBibsNative>true</refBibsNative><abstractWordCount>209</abstractWordCount><abstractCharCount>1295</abstractCharCount><keywordCount>3</keywordCount><score>9.508</score><pdfWordCount>5109</pdfWordCount><pdfCharCount>25699</pdfCharCount><pdfVersion>1.2</pdfVersion><pdfPageCount>10</pdfPageCount><pdfPageSize>540 x 712 pts</pdfPageSize></qualityIndicators><title>Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam</title><pii><json:string>S0370-2693(00)00375-0</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>2000</publicationDate><issn><json:string>0370-2693</json:string></issn><pii><json:string>S0370-2693(00)X0274-2</json:string></pii><volume>479</volume><issue>4</issue><pages><first>371</first><last>380</last></pages><genre><json:string>journal</json:string></genre></host><namedEntities><unitex><date><json:string>2000</json:string><json:string>1996</json:string></date><geogName></geogName><orgName><json:string>Department of Energy, National Science Foundation Žgrant PHY</json:string><json:string>and Department of Industry, Science, and Resources ŽDISR</json:string><json:string>Institute, Zagreb, Croatia</json:string><json:string>Research, INR Moscow, Russia</json:string><json:string>Russian Foundation for Basic Research, Institute for Nuclear Research of the Russian Academy of Sciences, Russia</json:string><json:string>European Commission</json:string><json:string>France Johns Hopkins</json:string><json:string>Fonds National Suisse</json:string><json:string>Istituto Nazionale</json:string><json:string>Australian Research Council ŽARC</json:string></orgName><orgName_funder></orgName_funder><orgName_provider></orgName_provider><persName><json:string>P. Zuccon</json:string><json:string>D. Gibin</json:string><json:string>P. Meyer</json:string><json:string>A. Guglielmi</json:string><json:string>J. Gomez</json:string><json:string>Roma Tre</json:string><json:string>S.R. Mishra</json:string><json:string>F. Bobisut</json:string><json:string>V. Flaminio</json:string><json:string>I. Tkachev</json:string><json:string>L.S. Peak</json:string><json:string>P. Mendiburu</json:string><json:string>A.Yu</json:string><json:string>M. Contalbrigo</json:string><json:string>M. Mezzetto</json:string><json:string>E. Gangler</json:string><json:string>A.N. Toropin</json:string><json:string>A.V. Kovzelev</json:string><json:string>M. Laveder</json:string><json:string>M. Valdata-Nappi</json:string><json:string>A. Lupi</json:string><json:string>F. Martelli</json:string><json:string>M.M. Kirsanov</json:string><json:string>M. Ellis</json:string><json:string>A. Godley</json:string><json:string>A. Cervera</json:string><json:string>C. Nguyen</json:string><json:string>N.V. Krasnikov</json:string><json:string>A. Marchionni</json:string><json:string>G. Collazuol</json:string><json:string>T. Del</json:string><json:string>G.N. Taylor</json:string><json:string>M. Tareb-Reyes</json:string><json:string>L. Di</json:string><json:string>M. Gaillard</json:string><json:string>V. Matveev</json:string><json:string>J. Ulrichs</json:string><json:string>L. La Rotonda</json:string><json:string>X. Mechain</json:string><json:string>S. Lacaprara</json:string><json:string>S. Boyd</json:string><json:string>A. Letessier</json:string><json:string>Žschematically</json:string><json:string>K.E. Varvell</json:string><json:string>G. Raffelt</json:string><json:string>CLEO Collaboration</json:string><json:string>B.D. Yabsley</json:string><json:string>S.A. Volkov</json:string></persName><placeName><json:string>Dortmund</json:string><json:string>Paris</json:string><json:string>Switzerland</json:string><json:string>Columbia</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>Valencia</json:string><json:string>Pisa</json:string><json:string>Melbourne</json:string><json:string>SC</json:string><json:string>Los Angeles</json:string><json:string>USA</json:string><json:string>Baltimore</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>Spain</json:string><json:string>Zurich</json:string><json:string>Sydney</json:string></placeName><ref_url></ref_url><ref_bibl><json:string>P. Astier et al.</json:string></ref_bibl><bibl></bibl></unitex></namedEntities><ark><json:string>ark:/67375/6H6-B4ZJ56G3-Z</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 exactes et technologie</json:string><json:string>3 - terre, ocean, espace</json:string><json:string>4 - geophysique externe</json:string></inist></categories><publicationDate>2000</publicationDate><copyrightDate>2000</copyrightDate><doi><json:string>10.1016/S0370-2693(00)00375-0</json:string></doi><id>813D5FBBAF478A296BDE7144C09BF2758D8CBBE3</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/813D5FBBAF478A296BDE7144C09BF2758D8CBBE3/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/813D5FBBAF478A296BDE7144C09BF2758D8CBBE3/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/813D5FBBAF478A296BDE7144C09BF2758D8CBBE3/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a">Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©2000 Elsevier Science B.V.</p></availability><date>2000</date></publicationStmt><notesStmt><note>Editor: L. Montanet</note><note type="content">Fig. 1: Schematic layout of the WANF beam line (not to scale) and an illustration of the principle of the WANF-NOMAD high energy photon-regeneration experiment.</note><note type="content">Fig. 2: a) The energy spectrum of π0's produced in 450 GeV proton collisions with the neutrino target in a cone of ∼2 mrad. b) Energy spectrum of the photons crossing the horn magnetic field and momenta pointing towards the NOMAD fiducial area.</note><note type="content">Fig. 3: Energy spectra of photons entering the PRS, as expected from a→γ conversions of axions produced through γ→a conversions in the horn magnetic field. The effect of the axion mass on the energy spectra is clearly seen. The calculations are performed for 1.08×1019pot and gaγγ=10−4GeV−1.</note><note type="content">Fig. 4: The ECAL energy spectra for candidate (solid line) and background (full circles) events. Systematic errors are not shown. The shape of the axion signals corresponding to masses ma=30eV and ma=100eV are shown for comparison.</note><note type="content">Fig. 5: Upper limit on the coupling gaγγ as a function of the (pseudo)scalar mass ma derived from the present analysis and from the direct searches of light (pseudo)scalars performed by using the polarisation rotation of a laser beam in a magnetic field [10](dotted line) and using the laser photon regeneration method [9, 10](dashed line).</note><note type="content">Table 1: Expected numbers of axions and photons (Eγ>3GeV) obtained using the photon-regeneration method calculated for the coupling gaγγ=10−4GeV−1 and for 1.08×1019pot</note><note type="content">Table 2: Background Estimate. Total number of interactions in the PRS region and in the upstream region (last two rows) and the resulting number of expected background candidate events</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a">Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam</title><author role="org"><orgName>NOMAD Collaboration</orgName></author><author xml:id="author-0000"><persName><forename type="first">P.</forename><surname>Astier</surname></persName><affiliation>LPNHE, Univ. of Paris VI and VII, Paris, France</affiliation></author><author xml:id="author-0001"><persName><forename type="first">D.</forename><surname>Autiero</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-0002"><persName><forename type="first">A.</forename><surname>Baldisseri</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-0003"><persName><forename 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type="first">M.M.</forename><surname>Kirsanov</surname></persName><affiliation>Inst. 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Research, INR Moscow, Russia</affiliation></author><author xml:id="author-0103"><persName><forename type="first">B.</forename><surname>Popov</surname></persName><affiliation>JINR, Dubna, Russia</affiliation></author><author xml:id="author-0104"><persName><forename type="first">C.</forename><surname>Poulsen</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-0105"><persName><forename type="first">J.</forename><surname>Rico</surname></persName><affiliation>ETH Zürich, Zürich, Switzerland</affiliation></author><author xml:id="author-0106"><persName><forename type="first">C.</forename><surname>Roda</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-0107"><persName><forename type="first">A.</forename><surname>Rubbia</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-0108"><persName><forename type="first">F.</forename><surname>Salvatore</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-0109"><persName><forename type="first">K.</forename><surname>Schahmaneche</surname></persName><affiliation>LPNHE, Univ. of Paris VI and VII, Paris, France</affiliation></author><author xml:id="author-0110"><persName><forename type="first">B.</forename><surname>Schmidt</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-0111"><persName><forename type="first">T.</forename><surname>Schmidt</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-0112"><persName><forename type="first">M.</forename><surname>Sevior</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-0113"><persName><forename type="first">D.</forename><surname>Sillou</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-0114"><persName><forename type="first">F.J.P.</forename><surname>Soler</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-0115"><persName><forename type="first">G.</forename><surname>Sozzi</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-0116"><persName><forename type="first">D.</forename><surname>Steele</surname></persName><affiliation>Johns Hopkins Univ., Baltimore, MD, USA</affiliation></author><author xml:id="author-0117"><persName><forename type="first">M.</forename><surname>Steininger</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-0118"><persName><forename type="first">U.</forename><surname>Stiegler</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-0119"><persName><forename type="first">M.</forename><surname>Stipčević</surname></persName><affiliation>Rudjer Bošković Institute, Zagreb, Croatia</affiliation></author><author xml:id="author-0120"><persName><forename type="first">Th.</forename><surname>Stolarczyk</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-0121"><persName><forename type="first">M.</forename><surname>Tareb-Reyes</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-0122"><persName><forename type="first">G.N.</forename><surname>Taylor</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-0123"><persName><forename type="first">V.</forename><surname>Tereshchenko</surname></persName><affiliation>JINR, Dubna, Russia</affiliation></author><author xml:id="author-0124"><persName><forename type="first">A.N.</forename><surname>Toropin</surname></persName><affiliation>Inst. Nucl. Research, INR Moscow, Russia</affiliation></author><author xml:id="author-0125"><persName><forename type="first">A.-M.</forename><surname>Touchard</surname></persName><affiliation>LPNHE, Univ. of Paris VI and VII, Paris, France</affiliation></author><author xml:id="author-0126"><persName><forename type="first">S.N.</forename><surname>Tovey</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-0127"><persName><forename type="first">M.-T.</forename><surname>Tran</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-0128"><persName><forename type="first">E.</forename><surname>Tsesmelis</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-0129"><persName><forename type="first">J.</forename><surname>Ulrichs</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation></author><author xml:id="author-0130"><persName><forename type="first">L.</forename><surname>Vacavant</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-0131"><persName><forename type="first">M.</forename><surname>Valdata-Nappi</surname></persName><affiliation>Univ. of Calabria and INFN, Cosenza, Italy</affiliation></author><author xml:id="author-0132"><persName><forename type="first">V.</forename><surname>Valuev</surname></persName><affiliation>JINR, Dubna, Russia</affiliation></author><author xml:id="author-0133"><persName><forename type="first">F.</forename><surname>Vannucci</surname></persName><affiliation>LPNHE, Univ. of Paris VI and VII, Paris, France</affiliation></author><author xml:id="author-0134"><persName><forename type="first">K.E.</forename><surname>Varvell</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation></author><author xml:id="author-0135"><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-0136"><persName><forename type="first">V.</forename><surname>Vercesi</surname></persName><affiliation>Univ. of Pavia and INFN, Pavia, Italy</affiliation></author><author xml:id="author-0137"><persName><forename type="first">D.</forename><surname>Verkindt</surname></persName><affiliation>LAPP, Annecy, France</affiliation></author><author xml:id="author-0138"><persName><forename type="first">J.-M.</forename><surname>Vieira</surname></persName><affiliation>University of Lausanne, Lausanne, Switzerland</affiliation></author><author xml:id="author-0139"><persName><forename type="first">T.</forename><surname>Vinogradova</surname></persName><affiliation>UCLA, Los Angeles, CA, USA</affiliation></author><author xml:id="author-0140"><persName><forename type="first">S.A.</forename><surname>Volkov</surname></persName><affiliation>Inst. Nucl. Research, INR Moscow, Russia</affiliation></author><author xml:id="author-0141"><persName><forename type="first">F.V.</forename><surname>Weber</surname></persName><affiliation>Harvard Univ., Cambridge, MA, USA</affiliation></author><author xml:id="author-0142"><persName><forename type="first">T.</forename><surname>Weisse</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-0143"><persName><forename type="first">F.F.</forename><surname>Wilson</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-0144"><persName><forename type="first">L.J.</forename><surname>Winton</surname></persName><affiliation>University of Melbourne, Melbourne, Australia</affiliation></author><author xml:id="author-0145"><persName><forename type="first">B.D.</forename><surname>Yabsley</surname></persName><affiliation>Univ. of Sydney, Sydney, Australia</affiliation></author><author xml:id="author-0146"><persName><forename type="first">H.</forename><surname>Zaccone</surname></persName><affiliation>DAPNIA, CEA Saclay, France</affiliation></author><author xml:id="author-0147"><persName><forename type="first">K.</forename><surname>Zioutas</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-0148"><persName><forename type="first">K.</forename><surname>Zuber</surname></persName><affiliation>Dortmund Univ., Dortmund, Germany</affiliation></author><author xml:id="author-0149"><persName><forename type="first">P.</forename><surname>Zuccon</surname></persName><affiliation>Univ. of Padova and INFN, Padova, Italy</affiliation></author><idno type="istex">813D5FBBAF478A296BDE7144C09BF2758D8CBBE3</idno><idno type="DOI">10.1016/S0370-2693(00)00375-0</idno><idno type="PII">S0370-2693(00)00375-0</idno></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)X0274-2</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2000"></date><biblScope unit="volume">479</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="371">371</biblScope><biblScope unit="page" to="380">380</biblScope></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2000</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>We carried out a model-independent search for light scalar or pseudoscalar particles a's (an example of which is the axion) that couple to two photons by using a photon-regeneration method at high energies allowing a substantial increase in the sensitivity to eV masses. The experimental set-up is based on elements of the CERN West Area Neutrino Facility (WANF) beam line and the NOMAD neutrino detector. The new particles, if they exist, could be produced through the Primakoff effect in interactions of high energy photons, generated by the 450 GeV protons in the CERN SPS neutrino target, with virtual photons from the WANF horn magnetic field. The particles would penetrate the downstream shielding and would be observed in the NOMAD neutrino detector through their re-conversion into real high energy photons by interacting with the virtual photons from the magnetic field of the NOMAD dipole magnet. From the analysis of the data collected during the 1996 run with 1.08×1019 protons on target, 312 candidate events with energy between 5 and 140 GeV were found. This number is in general agreement with the expectation of 272±18 background events from standard neutrino processes. A 90 %CL upper limit on the aγγ-coupling gaγγ< 1.5×10−4GeV−1 for a masses up to 40 eV is obtained.</p></abstract><textClass><keywords scheme="keyword"><list><head>article-category</head><item><term>Experiments</term></item></list></keywords></textClass><textClass><keywords scheme="keyword"><list><head>Keywords</head><item><term>Light (pseudo)scalars</term></item><item><term>Photon-regeneration</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2000">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/813D5FBBAF478A296BDE7144C09BF2758D8CBBE3/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:docType><istex:document><converted-article version="4.5.2" docsubtype="fla"><item-info><jid>PLB</jid><aid>15873</aid><ce:pii>S0370-2693(00)00375-0</ce:pii><ce:doi>10.1016/S0370-2693(00)00375-0</ce:doi><ce:copyright year="2000" type="full-transfer">Elsevier Science B.V.</ce:copyright><ce:doctopics><ce:doctopic><ce:text>Experiments</ce:text></ce:doctopic></ce:doctopics></item-info><head><ce:title>Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam</ce:title><ce:author-group><ce:collaboration><ce:text>NOMAD 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refid="AFF8">h</ce:cross-ref></ce:author><ce:author><ce:given-name>K.</ce:given-name><ce:surname>Zuber</ce:surname><ce:cross-ref refid="AFF5">e</ce:cross-ref></ce:author><ce:author><ce:given-name>P.</ce:given-name><ce:surname>Zuccon</ce:surname><ce:cross-ref refid="AFF13">m</ce:cross-ref></ce:author><ce:affiliation id="AFF1"><ce:label>a</ce:label><ce:textfn>LAPP, Annecy, France</ce:textfn></ce:affiliation><ce:affiliation id="AFF2"><ce:label>b</ce:label><ce:textfn>Johns Hopkins Univ., Baltimore, MD, USA</ce:textfn></ce:affiliation><ce:affiliation id="AFF3"><ce:label>c</ce:label><ce:textfn>Harvard Univ., Cambridge, MA, USA</ce:textfn></ce:affiliation><ce:affiliation id="AFF4"><ce:label>d</ce:label><ce:textfn>Univ. of Calabria and INFN, Cosenza, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF5"><ce:label>e</ce:label><ce:textfn>Dortmund Univ., Dortmund, Germany</ce:textfn></ce:affiliation><ce:affiliation id="AFF6"><ce:label>f</ce:label><ce:textfn>JINR, Dubna, Russia</ce:textfn></ce:affiliation><ce:affiliation id="AFF7"><ce:label>g</ce:label><ce:textfn>Univ. of Florence and INFN, Florence, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF8"><ce:label>h</ce:label><ce:textfn>CERN, Geneva, Switzerland</ce:textfn></ce:affiliation><ce:affiliation id="AFF9"><ce:label>i</ce:label><ce:textfn>University of Lausanne, Lausanne, Switzerland</ce:textfn></ce:affiliation><ce:affiliation id="AFF10"><ce:label>j</ce:label><ce:textfn>UCLA, Los Angeles, CA, USA</ce:textfn></ce:affiliation><ce:affiliation id="AFF11"><ce:label>k</ce:label><ce:textfn>University of Melbourne, Melbourne, Australia</ce:textfn></ce:affiliation><ce:affiliation id="AFF12"><ce:label>l</ce:label><ce:textfn>Inst. Nucl. Research, INR Moscow, Russia</ce:textfn></ce:affiliation><ce:affiliation id="AFF13"><ce:label>m</ce:label><ce:textfn>Univ. of Padova and INFN, Padova, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF14"><ce:label>n</ce:label><ce:textfn>LPNHE, Univ. of Paris VI and VII, Paris, France</ce:textfn></ce:affiliation><ce:affiliation id="AFF15"><ce:label>o</ce:label><ce:textfn>Univ. of Pavia and INFN, Pavia, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF16"><ce:label>p</ce:label><ce:textfn>Univ. of Perugia and INFN, Perugia, 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 Tre University and INFN, 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>ANSTO Sydney, Menai, Australia</ce:textfn></ce:affiliation><ce:affiliation id="AFF21"><ce:label>u</ce:label><ce:textfn>Univ. of South Carolina, Columbia, SC, USA</ce:textfn></ce:affiliation><ce:affiliation id="AFF22"><ce:label>v</ce:label><ce:textfn>Univ. of Sydney, Sydney, Australia</ce:textfn></ce:affiliation><ce:affiliation id="AFF23"><ce:label>w</ce:label><ce:textfn>Univ. of Urbino, Urbino, and INFN Florence, Italy</ce:textfn></ce:affiliation><ce:affiliation id="AFF24"><ce:label>x</ce:label><ce:textfn>IFIC, Valencia, Spain</ce:textfn></ce:affiliation><ce:affiliation id="AFF25"><ce:label>y</ce:label><ce:textfn>Rudjer Bošković Institute, Zagreb, Croatia</ce:textfn></ce:affiliation><ce:affiliation id="AFF26"><ce:label>z</ce:label><ce:textfn>ETH Zürich, Zürich, Switzerland</ce:textfn></ce:affiliation></ce:author-group><ce:date-received day="9" month="2" year="2000"></ce:date-received><ce:date-accepted day="17" month="3" year="2000"></ce:date-accepted><ce:miscellaneous>Editor: L. Montanet</ce:miscellaneous><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>We carried out a model-independent search for light scalar or pseudoscalar particles <ce:italic>a</ce:italic>'s (an example of which is the axion) that couple to two photons by using a photon-regeneration method at high energies allowing a substantial increase in the sensitivity to eV masses. The experimental set-up is based on elements of the CERN West Area Neutrino Facility (WANF) beam line and the NOMAD neutrino detector. The new particles, if they exist, could be produced through the Primakoff effect in interactions of high energy photons, generated by the 450 GeV protons in the CERN SPS neutrino target, with virtual photons from the WANF horn magnetic field. The particles would penetrate the downstream shielding and would be observed in the NOMAD neutrino detector through their re-conversion into real high energy photons by interacting with the virtual photons from the magnetic field of the NOMAD dipole magnet.</ce:simple-para><ce:simple-para>From the analysis of the data collected during the 1996 run with 1.08×10<ce:sup>19</ce:sup> protons on target, 312 candidate events with energy between 5 and 140 GeV were found. This number is in general agreement with the expectation of 272±18 background events from standard neutrino processes. A 90 <math altimg="si9.gif">%<ce:hsp sp="0.3"></ce:hsp>CL</math> upper limit on the <ce:italic>aγγ</ce:italic>-coupling <ce:italic>g</ce:italic><ce:inf><ce:italic>aγγ</ce:italic></ce:inf>< 1.5<math altimg="si10.gif">×10<sup>−4</sup><ce:hsp sp="0.3"></ce:hsp><rm><ce:hsp sp="0.4"></ce:hsp>GeV</rm><sup>−1</sup></math> for <ce:italic>a</ce:italic> masses up to 40 eV is obtained.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>Light (pseudo)scalars</ce:text></ce:keyword><ce:keyword><ce:text>Photon-regeneration</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo><title>Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam</title></titleInfo><titleInfo type="alternative" contentType="CDATA"><title>Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam</title></titleInfo><name type="corporate"><namePart>NOMAD Collaboration</namePart></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Astier</namePart><affiliation>LPNHE, Univ. of Paris VI and VII, Paris, 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 VI and VII, Paris, France</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>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">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.</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 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USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H.</namePart><namePart type="family">Degaudenzi</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">Del 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">A.</namePart><namePart type="family">De Santo</namePart><affiliation>CERN, Geneva, Switzerland</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 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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">E.</namePart><namePart type="family">Gangler</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">Geiser</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">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>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Godley</namePart><affiliation>Univ. of Sydney, Sydney, Australia</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>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 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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>IFIC, Valencia, Spain</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">F.</namePart><namePart type="family">Juget</namePart><affiliation>University of Lausanne, Lausanne, 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>Inst. Nucl. 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>Inst. Nucl. Research, INR Moscow, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N.V.</namePart><namePart type="family">Krasnikov</namePart><affiliation>Inst. Nucl. 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type="family">Letessier-Selvon</namePart><affiliation>LPNHE, Univ. of Paris VI and VII, Paris, 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 VI and VII, Paris, 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, 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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><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 Tre University and INFN, 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 Tre University and INFN, 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">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">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">A.Yu.</namePart><namePart type="family">Polyarush</namePart><affiliation>Inst. Nucl. Research, INR Moscow, Russia</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><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">J.</namePart><namePart type="family">Rico</namePart><affiliation>ETH Zürich, Zürich, Switzerland</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><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">K.</namePart><namePart type="family">Schahmaneche</namePart><affiliation>LPNHE, Univ. of Paris VI and VII, Paris, 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">T.</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">M.</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>CERN, Geneva, Switzerland</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><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">Th.</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>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">V.</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>Inst. Nucl. 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 VI and VII, Paris, 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>CERN, Geneva, Switzerland</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">L.</namePart><namePart type="family">Vacavant</namePart><affiliation>University of Lausanne, Lausanne, Switzerland</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><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><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 VI and VII, Paris, 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><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">S.A.</namePart><namePart type="family">Volkov</namePart><affiliation>Inst. Nucl. Research, INR Moscow, Russia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.V.</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">F.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">Zioutas</namePart><affiliation>CERN, Geneva, Switzerland</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><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Zuccon</namePart><affiliation>Univ. of Padova and INFN, Padova, Italy</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">2000</dateIssued><copyrightDate encoding="w3cdtf">2000</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><abstract lang="en">Abstract: We carried out a model-independent search for light scalar or pseudoscalar particles a's (an example of which is the axion) that couple to two photons by using a photon-regeneration method at high energies allowing a substantial increase in the sensitivity to eV masses. The experimental set-up is based on elements of the CERN West Area Neutrino Facility (WANF) beam line and the NOMAD neutrino detector. The new particles, if they exist, could be produced through the Primakoff effect in interactions of high energy photons, generated by the 450 GeV protons in the CERN SPS neutrino target, with virtual photons from the WANF horn magnetic field. The particles would penetrate the downstream shielding and would be observed in the NOMAD neutrino detector through their re-conversion into real high energy photons by interacting with the virtual photons from the magnetic field of the NOMAD dipole magnet. From the analysis of the data collected during the 1996 run with 1.08×1019 protons on target, 312 candidate events with energy between 5 and 140 GeV were found. This number is in general agreement with the expectation of 272±18 background events from standard neutrino processes. A 90 %CL upper limit on the aγγ-coupling gaγγ< 1.5×10−4GeV−1 for a masses up to 40 eV is obtained.</abstract><note>Editor: L. Montanet</note><note type="content">Fig. 1: Schematic layout of the WANF beam line (not to scale) and an illustration of the principle of the WANF-NOMAD high energy photon-regeneration experiment.</note><note type="content">Fig. 2: a) The energy spectrum of π0's produced in 450 GeV proton collisions with the neutrino target in a cone of ∼2 mrad. b) Energy spectrum of the photons crossing the horn magnetic field and momenta pointing towards the NOMAD fiducial area.</note><note type="content">Fig. 3: Energy spectra of photons entering the PRS, as expected from a→γ conversions of axions produced through γ→a conversions in the horn magnetic field. The effect of the axion mass on the energy spectra is clearly seen. The calculations are performed for 1.08×1019pot and gaγγ=10−4GeV−1.</note><note type="content">Fig. 4: The ECAL energy spectra for candidate (solid line) and background (full circles) events. Systematic errors are not shown. The shape of the axion signals corresponding to masses ma=30eV and ma=100eV are shown for comparison.</note><note type="content">Fig. 5: Upper limit on the coupling gaγγ as a function of the (pseudo)scalar mass ma derived from the present analysis and from the direct searches of light (pseudo)scalars performed by using the polarisation rotation of a laser beam in a magnetic field [10](dotted line) and using the laser photon regeneration method [9, 10](dashed line).</note><note type="content">Table 1: Expected numbers of axions and photons (Eγ>3GeV) obtained using the photon-regeneration method calculated for the coupling gaγγ=10−4GeV−1 and for 1.08×1019pot</note><note type="content">Table 2: Background Estimate. Total number of interactions in the PRS region and in the upstream region (last two rows) and the resulting number of expected background candidate events</note><subject><genre>article-category</genre><topic>Experiments</topic></subject><subject><genre>Keywords</genre><topic>Light (pseudo)scalars</topic><topic>Photon-regeneration</topic></subject><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">20000427</dateIssued></originInfo><identifier type="ISSN">0370-2693</identifier><identifier type="PII">S0370-2693(00)X0274-2</identifier><part><date>20000427</date><detail type="volume"><number>479</number><caption>vol.</caption></detail><detail type="issue"><number>4</number><caption>no.</caption></detail><extent unit="issue-pages"><start>353</start><end>498</end></extent><extent unit="pages"><start>371</start><end>380</end></extent></part></relatedItem><identifier type="istex">813D5FBBAF478A296BDE7144C09BF2758D8CBBE3</identifier><identifier type="ark">ark:/67375/6H6-B4ZJ56G3-Z</identifier><identifier type="DOI">10.1016/S0370-2693(00)00375-0</identifier><identifier type="PII">S0370-2693(00)00375-0</identifier><accessCondition type="use and reproduction" contentType="copyright">©2000 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., ©2000</recordOrigin></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/813D5FBBAF478A296BDE7144C09BF2758D8CBBE3/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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