Measurement of charm production in neutrino charged-current interactions
Identifieur interne : 001721 ( Istex/Corpus ); précédent : 001720; suivant : 001722Measurement of charm production in neutrino charged-current interactions
Auteurs : A. Kayis-Topaksu ; G. Nengt ; R. Van Dantzig ; M. De Jong ; R G C. Oldeman ; M. Gler ; U. Kse ; P. Tolun ; M G Catanesi ; M T Muciaccia ; K. Winter ; B. Van De Vyver ; P. Vilain ; G. Wilquet ; B. Saitta ; E. Di Capua ; S. Ogawa ; H. Shibuya ; I R Hristova ; T. Kawamura ; D. Kolev ; H. Meinhard ; J. Panman ; A. Rozanov ; R. Tsenov ; J W E. Uiterwijk ; P. Zucchelli ; J. Goldberg ; M. Chikawa ; J S Song ; C S Yoon ; K. Kodama ; N. Ushida ; S. Aoki ; T. Hara ; T. Delbar ; D. Favart ; G. Grgoire ; S. Kalinin ; I. Makhlioueva ; A. Artamonov ; P. Gorbunov ; V. Khovansky ; V. Shamanov ; I. Tsukerman ; N. Bruski ; D. Frekers ; K. Hoshino ; J. Kawada ; M. Komatsu ; M. Miyanishi ; M. Nakamura ; T. Nakano ; K. Narita ; K. Niu ; K. Niwa ; N. Nonaka ; O. Sato ; T. Toshito ; S. Buontempo ; A G Cocco ; N. D'Ambrosio ; G. De Lellis ; G. De Rosa ; F. Di Capua ; G. Fiorillo ; A. Marotta ; M. Messina ; P. Migliozzi ; L. Scotto Lavina ; P. Strolin ; V. Tioukov ; T. Okusawa ; U. Dore ; P F Loverre ; L. Ludovici ; G. Rosa ; R. Santacesaria ; A. Satta ; F R Spada ; E. Barbuto ; C. Bozza ; G. Grella ; G. Romano ; C. Sirignano ; S. Sorrentino ; Y. Sato ; I. TezukaSource :
- New Journal of Physics [ 1367-2630 ] ; 2011.
Abstract
The nuclear emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27GeV average neutrino energy from 1994 to 1997. In total, about 100000 charged-current (CC) neutrino interactions with at least one identified muon were located in the emulsion target and fully reconstructed, using newly developed automated scanning systems. Charmed particles were searched for by a program recognizing particle decays. The observation of the decay in nuclear emulsion makes it possible to select a sample with very low background and minimal kinematical bias. In all, 2013 CC interactions with a charmed hadron candidate in the final state were selected and confirmed through visual inspection. The charm production rate induced by neutrinos relative to the CC cross-section is measured to be (NCX)/(CC)(5.750.32(stat)0.30(syst)). The charm production cross-section as a function of neutrino energy is also obtained. The results are in good agreement with previous measurements. The charm-quark hadronization produces the following charmed hadrons with relative fractions (in ): fD043.74.5, fc19.24.2, fD25.34.2 and fDs11.84.7.
Url:
DOI: 10.1088/1367-2630/13/9/093002
Links to Exploration step
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De Jong</name><affiliation><mods:affiliation>NIKHEF, Amsterdam, The Netherlands</mods:affiliation></affiliation></author><author><name sortKey="Oldeman, R G C" sort="Oldeman, R G C" uniqKey="Oldeman R" first="R G C" last="Oldeman">R G C. Oldeman</name><affiliation><mods:affiliation>NIKHEF, Amsterdam, The Netherlands</mods:affiliation></affiliation><affiliation><mods:affiliation>Now at Universitdi Cagliari and INFN, Cagliari, Italy</mods:affiliation></affiliation></author><author><name sortKey="Gler, M" sort="Gler, M" uniqKey="Gler M" first="M" last="Gler">M. Gler</name><affiliation><mods:affiliation>METU, Ankara, Turkey</mods:affiliation></affiliation></author><author><name sortKey="Kse, U" sort="Kse, U" uniqKey="Kse U" first="U" last="Kse">U. Kse</name><affiliation><mods:affiliation>METU, Ankara, Turkey</mods:affiliation></affiliation></author><author><name sortKey="Tolun, P" sort="Tolun, P" uniqKey="Tolun P" first="P" last="Tolun">P. Tolun</name><affiliation><mods:affiliation>METU, Ankara, Turkey</mods:affiliation></affiliation></author><author><name sortKey="Catanesi, M G" sort="Catanesi, M G" uniqKey="Catanesi M" first="M G" last="Catanesi">M G Catanesi</name><affiliation><mods:affiliation>Universitdi Bari and INFN, Bari, Italy</mods:affiliation></affiliation></author><author><name sortKey="Muciaccia, M T" sort="Muciaccia, M T" uniqKey="Muciaccia M" first="M T" last="Muciaccia">M T Muciaccia</name><affiliation><mods:affiliation>Universitdi Bari and INFN, Bari, Italy</mods:affiliation></affiliation></author><author><name sortKey="Winter, K" sort="Winter, K" uniqKey="Winter K" first="K" last="Winter">K. Winter</name><affiliation><mods:affiliation>Humboldt Universitt, Berlin, Germany</mods:affiliation></affiliation></author><author><name sortKey="Van De Vyver, B" sort="Van De Vyver, B" uniqKey="Van De Vyver B" first="B" last="Van De Vyver">B. 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Santacesaria</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Satta, A" sort="Satta, A" uniqKey="Satta A" first="A" last="Satta">A. Satta</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Spada, F R" sort="Spada, F R" uniqKey="Spada F" first="F R" last="Spada">F R Spada</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Barbuto, E" sort="Barbuto, E" uniqKey="Barbuto E" first="E" last="Barbuto">E. Barbuto</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Bozza, C" sort="Bozza, C" uniqKey="Bozza C" first="C" last="Bozza">C. Bozza</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Grella, G" sort="Grella, G" uniqKey="Grella G" first="G" last="Grella">G. Grella</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Romano, G" sort="Romano, G" uniqKey="Romano G" first="G" last="Romano">G. Romano</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Sirignano, C" sort="Sirignano, C" uniqKey="Sirignano C" first="C" last="Sirignano">C. Sirignano</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Sorrentino, S" sort="Sorrentino, S" uniqKey="Sorrentino S" first="S" last="Sorrentino">S. Sorrentino</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Sato, Y" sort="Sato, Y" uniqKey="Sato Y" first="Y" last="Sato">Y. Sato</name><affiliation><mods:affiliation>Utsunomiya University, Utsunomiya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Tezuka, I" sort="Tezuka, I" uniqKey="Tezuka I" first="I" last="Tezuka">I. Tezuka</name><affiliation><mods:affiliation>Utsunomiya University, Utsunomiya, Japan</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD</idno><date when="2011" year="2011">2011</date><idno type="doi">10.1088/1367-2630/13/9/093002</idno><idno type="url">https://api.istex.fr/document/9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001721</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Measurement of charm production in neutrino charged-current interactions</title><author><name sortKey="Kayis Topaksu, A" sort="Kayis Topaksu, A" uniqKey="Kayis Topaksu A" first="A" last="Kayis-Topaksu">A. Kayis-Topaksu</name><affiliation><mods:affiliation>ukurova University, Adana, Turkey</mods:affiliation></affiliation></author><author><name sortKey="Nengt, G" sort="Nengt, G" uniqKey="Nengt G" first="G" last="Nengt">G. Nengt</name><affiliation><mods:affiliation>ukurova University, Adana, Turkey</mods:affiliation></affiliation></author><author><name sortKey="Van Dantzig, R" sort="Van Dantzig, R" uniqKey="Van Dantzig R" first="R" last="Van Dantzig">R. Van Dantzig</name><affiliation><mods:affiliation>NIKHEF, Amsterdam, The Netherlands</mods:affiliation></affiliation></author><author><name sortKey="De Jong, M" sort="De Jong, M" uniqKey="De Jong M" first="M" last="De Jong">M. De Jong</name><affiliation><mods:affiliation>NIKHEF, Amsterdam, The Netherlands</mods:affiliation></affiliation></author><author><name sortKey="Oldeman, R G C" sort="Oldeman, R G C" uniqKey="Oldeman R" first="R G C" last="Oldeman">R G C. Oldeman</name><affiliation><mods:affiliation>NIKHEF, Amsterdam, The Netherlands</mods:affiliation></affiliation><affiliation><mods:affiliation>Now at Universitdi Cagliari and INFN, Cagliari, Italy</mods:affiliation></affiliation></author><author><name sortKey="Gler, M" sort="Gler, M" uniqKey="Gler M" first="M" last="Gler">M. Gler</name><affiliation><mods:affiliation>METU, Ankara, Turkey</mods:affiliation></affiliation></author><author><name sortKey="Kse, U" sort="Kse, U" uniqKey="Kse U" first="U" last="Kse">U. Kse</name><affiliation><mods:affiliation>METU, Ankara, Turkey</mods:affiliation></affiliation></author><author><name sortKey="Tolun, P" sort="Tolun, P" uniqKey="Tolun P" first="P" last="Tolun">P. Tolun</name><affiliation><mods:affiliation>METU, Ankara, Turkey</mods:affiliation></affiliation></author><author><name sortKey="Catanesi, M G" sort="Catanesi, M G" uniqKey="Catanesi M" first="M G" last="Catanesi">M G Catanesi</name><affiliation><mods:affiliation>Universitdi Bari and INFN, Bari, Italy</mods:affiliation></affiliation></author><author><name sortKey="Muciaccia, M T" sort="Muciaccia, M T" uniqKey="Muciaccia M" first="M T" last="Muciaccia">M T Muciaccia</name><affiliation><mods:affiliation>Universitdi Bari and INFN, Bari, Italy</mods:affiliation></affiliation></author><author><name sortKey="Winter, K" sort="Winter, K" uniqKey="Winter K" first="K" last="Winter">K. Winter</name><affiliation><mods:affiliation>Humboldt Universitt, Berlin, Germany</mods:affiliation></affiliation></author><author><name sortKey="Van De Vyver, B" sort="Van De Vyver, B" uniqKey="Van De Vyver B" first="B" last="Van De Vyver">B. Van De Vyver</name><affiliation><mods:affiliation>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</mods:affiliation></affiliation><affiliation><mods:affiliation>Fonds voor Wetenschappelijk Onderzoek, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Vilain, P" sort="Vilain, P" uniqKey="Vilain P" first="P" last="Vilain">P. Vilain</name><affiliation><mods:affiliation>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</mods:affiliation></affiliation><affiliation><mods:affiliation>Fonds National de la Recherche Scientifique, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Wilquet, G" sort="Wilquet, G" uniqKey="Wilquet G" first="G" last="Wilquet">G. Wilquet</name><affiliation><mods:affiliation>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</mods:affiliation></affiliation><affiliation><mods:affiliation>Now at DESY, Hamburg</mods:affiliation></affiliation></author><author><name sortKey="Saitta, B" sort="Saitta, B" uniqKey="Saitta B" first="B" last="Saitta">B. Saitta</name><affiliation><mods:affiliation>Universitdi Cagliari and INFN, Cagliari, Italy</mods:affiliation></affiliation></author><author><name sortKey="Di Capua, E" sort="Di Capua, E" uniqKey="Di Capua E" first="E" last="Di Capua">E. Di Capua</name><affiliation><mods:affiliation>Universitdi Ferrara and INFN, Ferrara, Italy</mods:affiliation></affiliation></author><author><name sortKey="Ogawa, S" sort="Ogawa, S" uniqKey="Ogawa S" first="S" last="Ogawa">S. Ogawa</name><affiliation><mods:affiliation>Toho University, Funabashi, Japan</mods:affiliation></affiliation></author><author><name sortKey="Shibuya, H" sort="Shibuya, H" uniqKey="Shibuya H" first="H" last="Shibuya">H. Shibuya</name><affiliation><mods:affiliation>Toho University, Funabashi, Japan</mods:affiliation></affiliation></author><author><name sortKey="Hristova, I R" sort="Hristova, I R" uniqKey="Hristova I" first="I R" last="Hristova">I R Hristova</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation><affiliation><mods:affiliation>Now at DESY, Hamburg</mods:affiliation></affiliation></author><author><name sortKey="Kawamura, T" sort="Kawamura, T" uniqKey="Kawamura T" first="T" last="Kawamura">T. Kawamura</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Kolev, D" sort="Kolev, D" uniqKey="Kolev D" first="D" last="Kolev">D. Kolev</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation><affiliation><mods:affiliation>On leave of absence and at St. Kliment Ohridski University of Sofia, Bulgaria</mods:affiliation></affiliation></author><author><name sortKey="Meinhard, H" sort="Meinhard, H" uniqKey="Meinhard H" first="H" last="Meinhard">H. Meinhard</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Panman, J" sort="Panman, J" uniqKey="Panman J" first="J" last="Panman">J. Panman</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Rozanov, A" sort="Rozanov, A" uniqKey="Rozanov A" first="A" last="Rozanov">A. Rozanov</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation><affiliation><mods:affiliation>Now at CPPM CNRS-IN2P3, Marseille, France</mods:affiliation></affiliation></author><author><name sortKey="Tsenov, R" sort="Tsenov, R" uniqKey="Tsenov R" first="R" last="Tsenov">R. Tsenov</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation><affiliation><mods:affiliation>Now at CPPM CNRS-IN2P3, Marseille, France</mods:affiliation></affiliation></author><author><name sortKey="Uiterwijk, J W E" sort="Uiterwijk, J W E" uniqKey="Uiterwijk J" first="J W E" last="Uiterwijk">J W E. Uiterwijk</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Zucchelli, P" sort="Zucchelli, P" uniqKey="Zucchelli P" first="P" last="Zucchelli">P. Zucchelli</name><affiliation><mods:affiliation>CERN, Geneva, Switzerland</mods:affiliation></affiliation><affiliation><mods:affiliation>On leave of absence from INFN, Ferrara, Italy</mods:affiliation></affiliation></author><author><name sortKey="Goldberg, J" sort="Goldberg, J" uniqKey="Goldberg J" first="J" last="Goldberg">J. Goldberg</name><affiliation><mods:affiliation>Technion, Haifa, Israel</mods:affiliation></affiliation></author><author><name sortKey="Chikawa, M" sort="Chikawa, M" uniqKey="Chikawa M" first="M" last="Chikawa">M. Chikawa</name><affiliation><mods:affiliation>Kinki University, Higashioaka, Japan</mods:affiliation></affiliation></author><author><name sortKey="Song, J S" sort="Song, J S" uniqKey="Song J" first="J S" last="Song">J S Song</name><affiliation><mods:affiliation>Gyeongsang National University, Jinju, Korea</mods:affiliation></affiliation></author><author><name sortKey="Yoon, C S" sort="Yoon, C S" uniqKey="Yoon C" first="C S" last="Yoon">C S Yoon</name><affiliation><mods:affiliation>Gyeongsang National University, Jinju, Korea</mods:affiliation></affiliation></author><author><name sortKey="Kodama, K" sort="Kodama, K" uniqKey="Kodama K" first="K" last="Kodama">K. Kodama</name><affiliation><mods:affiliation>Aichi University of Education, Kariya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Ushida, N" sort="Ushida, N" uniqKey="Ushida N" first="N" last="Ushida">N. Ushida</name><affiliation><mods:affiliation>Aichi University of Education, Kariya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Aoki, S" sort="Aoki, S" uniqKey="Aoki S" first="S" last="Aoki">S. Aoki</name><affiliation><mods:affiliation>Kobe University, Kobe, Japan</mods:affiliation></affiliation></author><author><name sortKey="Hara, T" sort="Hara, T" uniqKey="Hara T" first="T" last="Hara">T. Hara</name><affiliation><mods:affiliation>Kobe University, Kobe, Japan</mods:affiliation></affiliation></author><author><name sortKey="Delbar, T" sort="Delbar, T" uniqKey="Delbar T" first="T" last="Delbar">T. Delbar</name><affiliation><mods:affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Favart, D" sort="Favart, D" uniqKey="Favart D" first="D" last="Favart">D. Favart</name><affiliation><mods:affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Grgoire, G" sort="Grgoire, G" uniqKey="Grgoire G" first="G" last="Grgoire">G. Grgoire</name><affiliation><mods:affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Kalinin, S" sort="Kalinin, S" uniqKey="Kalinin S" first="S" last="Kalinin">S. Kalinin</name><affiliation><mods:affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Makhlioueva, I" sort="Makhlioueva, I" uniqKey="Makhlioueva I" first="I" last="Makhlioueva">I. Makhlioueva</name><affiliation><mods:affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Artamonov, A" sort="Artamonov, A" uniqKey="Artamonov A" first="A" last="Artamonov">A. Artamonov</name><affiliation><mods:affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</mods:affiliation></affiliation></author><author><name sortKey="Gorbunov, P" sort="Gorbunov, P" uniqKey="Gorbunov P" first="P" last="Gorbunov">P. Gorbunov</name><affiliation><mods:affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</mods:affiliation></affiliation></author><author><name sortKey="Khovansky, V" sort="Khovansky, V" uniqKey="Khovansky V" first="V" last="Khovansky">V. Khovansky</name><affiliation><mods:affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</mods:affiliation></affiliation></author><author><name sortKey="Shamanov, V" sort="Shamanov, V" uniqKey="Shamanov V" first="V" last="Shamanov">V. Shamanov</name><affiliation><mods:affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</mods:affiliation></affiliation></author><author><name sortKey="Tsukerman, I" sort="Tsukerman, I" uniqKey="Tsukerman I" first="I" last="Tsukerman">I. Tsukerman</name><affiliation><mods:affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</mods:affiliation></affiliation></author><author><name sortKey="Bruski, N" sort="Bruski, N" uniqKey="Bruski N" first="N" last="Bruski">N. Bruski</name><affiliation><mods:affiliation>Westflische Wilhelms-Universitt, Mnster, Germany</mods:affiliation></affiliation></author><author><name sortKey="Frekers, D" sort="Frekers, D" uniqKey="Frekers D" first="D" last="Frekers">D. Frekers</name><affiliation><mods:affiliation>Westflische Wilhelms-Universitt, Mnster, Germany</mods:affiliation></affiliation></author><author><name sortKey="Hoshino, K" sort="Hoshino, K" uniqKey="Hoshino K" first="K" last="Hoshino">K. Hoshino</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Kawada, J" sort="Kawada, J" uniqKey="Kawada J" first="J" last="Kawada">J. Kawada</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation><affiliation><mods:affiliation>Now at University of Bern, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Komatsu, M" sort="Komatsu, M" uniqKey="Komatsu M" first="M" last="Komatsu">M. Komatsu</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Miyanishi, M" sort="Miyanishi, M" uniqKey="Miyanishi M" first="M" last="Miyanishi">M. Miyanishi</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Nakamura, M" sort="Nakamura, M" uniqKey="Nakamura M" first="M" last="Nakamura">M. Nakamura</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Nakano, T" sort="Nakano, T" uniqKey="Nakano T" first="T" last="Nakano">T. Nakano</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Narita, K" sort="Narita, K" uniqKey="Narita K" first="K" last="Narita">K. Narita</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Niu, K" sort="Niu, K" uniqKey="Niu K" first="K" last="Niu">K. Niu</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Niwa, K" sort="Niwa, K" uniqKey="Niwa K" first="K" last="Niwa">K. Niwa</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Nonaka, N" sort="Nonaka, N" uniqKey="Nonaka N" first="N" last="Nonaka">N. Nonaka</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Sato, O" sort="Sato, O" uniqKey="Sato O" first="O" last="Sato">O. Sato</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Toshito, T" sort="Toshito, T" uniqKey="Toshito T" first="T" last="Toshito">T. Toshito</name><affiliation><mods:affiliation>Nagoya University, Nagoya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Buontempo, S" sort="Buontempo, S" uniqKey="Buontempo S" first="S" last="Buontempo">S. Buontempo</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="Cocco, A G" sort="Cocco, A G" uniqKey="Cocco A" first="A G" last="Cocco">A G Cocco</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="D Ambrosio, N" sort="D Ambrosio, N" uniqKey="D Ambrosio N" first="N" last="D'Ambrosio">N. D'Ambrosio</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="De Lellis, G" sort="De Lellis, G" uniqKey="De Lellis G" first="G" last="De Lellis">G. De Lellis</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="De Rosa, G" sort="De Rosa, G" uniqKey="De Rosa G" first="G" last="De Rosa">G. De Rosa</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="Di Capua, F" sort="Di Capua, F" uniqKey="Di Capua F" first="F" last="Di Capua">F. Di Capua</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation><affiliation><mods:affiliation>Author to whom any correspondence should be addressed</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: dicapua@na.infn.it</mods:affiliation></affiliation></author><author><name sortKey="Fiorillo, G" sort="Fiorillo, G" uniqKey="Fiorillo G" first="G" last="Fiorillo">G. Fiorillo</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="Marotta, A" sort="Marotta, A" uniqKey="Marotta A" first="A" last="Marotta">A. Marotta</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="Messina, M" sort="Messina, M" uniqKey="Messina M" first="M" last="Messina">M. Messina</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="Migliozzi, P" sort="Migliozzi, P" uniqKey="Migliozzi P" first="P" last="Migliozzi">P. Migliozzi</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="Scotto Lavina, L" sort="Scotto Lavina, L" uniqKey="Scotto Lavina L" first="L" last="Scotto Lavina">L. Scotto Lavina</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="Strolin, P" sort="Strolin, P" uniqKey="Strolin P" first="P" last="Strolin">P. Strolin</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="Tioukov, V" sort="Tioukov, V" uniqKey="Tioukov V" first="V" last="Tioukov">V. Tioukov</name><affiliation><mods:affiliation>UniversitFederico II and INFN, Naples, Italy</mods:affiliation></affiliation></author><author><name sortKey="Okusawa, T" sort="Okusawa, T" uniqKey="Okusawa T" first="T" last="Okusawa">T. Okusawa</name><affiliation><mods:affiliation>Osaka City University, Osaka, Japan</mods:affiliation></affiliation></author><author><name sortKey="Dore, U" sort="Dore, U" uniqKey="Dore U" first="U" last="Dore">U. Dore</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Loverre, P F" sort="Loverre, P F" uniqKey="Loverre P" first="P F" last="Loverre">P F Loverre</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Ludovici, L" sort="Ludovici, L" uniqKey="Ludovici L" first="L" last="Ludovici">L. Ludovici</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Rosa, G" sort="Rosa, G" uniqKey="Rosa G" first="G" last="Rosa">G. Rosa</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Santacesaria, R" sort="Santacesaria, R" uniqKey="Santacesaria R" first="R" last="Santacesaria">R. Santacesaria</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Satta, A" sort="Satta, A" uniqKey="Satta A" first="A" last="Satta">A. Satta</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Spada, F R" sort="Spada, F R" uniqKey="Spada F" first="F R" last="Spada">F R Spada</name><affiliation><mods:affiliation>UniversitLa Sapienza and INFN, Rome, Italy</mods:affiliation></affiliation></author><author><name sortKey="Barbuto, E" sort="Barbuto, E" uniqKey="Barbuto E" first="E" last="Barbuto">E. Barbuto</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Bozza, C" sort="Bozza, C" uniqKey="Bozza C" first="C" last="Bozza">C. Bozza</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Grella, G" sort="Grella, G" uniqKey="Grella G" first="G" last="Grella">G. Grella</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Romano, G" sort="Romano, G" uniqKey="Romano G" first="G" last="Romano">G. Romano</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Sirignano, C" sort="Sirignano, C" uniqKey="Sirignano C" first="C" last="Sirignano">C. Sirignano</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Sorrentino, S" sort="Sorrentino, S" uniqKey="Sorrentino S" first="S" last="Sorrentino">S. Sorrentino</name><affiliation><mods:affiliation>Universitdi Salerno and INFN, Salerno, Italy</mods:affiliation></affiliation></author><author><name sortKey="Sato, Y" sort="Sato, Y" uniqKey="Sato Y" first="Y" last="Sato">Y. Sato</name><affiliation><mods:affiliation>Utsunomiya University, Utsunomiya, Japan</mods:affiliation></affiliation></author><author><name sortKey="Tezuka, I" sort="Tezuka, I" uniqKey="Tezuka I" first="I" last="Tezuka">I. Tezuka</name><affiliation><mods:affiliation>Utsunomiya University, Utsunomiya, Japan</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">New Journal of Physics</title><title level="j" type="abbrev">New J. Phys.</title><idno type="ISSN">1367-2630</idno><idno type="eISSN">1367-2630</idno><imprint><publisher>IOP Publishing</publisher><date type="published" when="2011">2011</date><biblScope unit="volume">13</biblScope><biblScope unit="issue">9</biblScope><biblScope unit="page" from="1">1</biblScope><biblScope unit="page" to="15">15</biblScope></imprint><idno type="ISSN">1367-2630</idno></series><idno type="istex">9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD</idno><idno type="DOI">10.1088/1367-2630/13/9/093002</idno><idno type="articleID">399459</idno><idno type="articleNumber">093002</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1367-2630</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">The nuclear emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27GeV average neutrino energy from 1994 to 1997. In total, about 100000 charged-current (CC) neutrino interactions with at least one identified muon were located in the emulsion target and fully reconstructed, using newly developed automated scanning systems. Charmed particles were searched for by a program recognizing particle decays. The observation of the decay in nuclear emulsion makes it possible to select a sample with very low background and minimal kinematical bias. In all, 2013 CC interactions with a charmed hadron candidate in the final state were selected and confirmed through visual inspection. The charm production rate induced by neutrinos relative to the CC cross-section is measured to be (NCX)/(CC)(5.750.32(stat)0.30(syst)). The charm production cross-section as a function of neutrino energy is also obtained. The results are in good agreement with previous measurements. The charm-quark hadronization produces the following charmed hadrons with relative fractions (in ): fD043.74.5, fc19.24.2, fD25.34.2 and fDs11.84.7.</div></front></TEI><istex><corpusName>iop</corpusName><author><json:item><name>A Kayis-Topaksu</name><affiliations><json:string>ukurova University, Adana, Turkey</json:string></affiliations></json:item><json:item><name>G nengt</name><affiliations><json:string>ukurova University, Adana, Turkey</json:string></affiliations></json:item><json:item><name>R van Dantzig</name><affiliations><json:string>NIKHEF, Amsterdam, The Netherlands</json:string></affiliations></json:item><json:item><name>M de Jong</name><affiliations><json:string>NIKHEF, Amsterdam, The Netherlands</json:string></affiliations></json:item><json:item><name>R G C Oldeman</name><affiliations><json:string>NIKHEF, Amsterdam, The Netherlands</json:string><json:string>Now at Universitdi Cagliari and INFN, Cagliari, Italy</json:string></affiliations></json:item><json:item><name>M Gler</name><affiliations><json:string>METU, Ankara, Turkey</json:string></affiliations></json:item><json:item><name>U Kse</name><affiliations><json:string>METU, Ankara, Turkey</json:string></affiliations></json:item><json:item><name>P Tolun</name><affiliations><json:string>METU, Ankara, Turkey</json:string></affiliations></json:item><json:item><name>M G Catanesi</name><affiliations><json:string>Universitdi Bari and INFN, Bari, Italy</json:string></affiliations></json:item><json:item><name>M T Muciaccia</name><affiliations><json:string>Universitdi Bari and INFN, Bari, Italy</json:string></affiliations></json:item><json:item><name>K Winter</name><affiliations><json:string>Humboldt Universitt, Berlin, Germany</json:string></affiliations></json:item><json:item><name>B Van de Vyver</name><affiliations><json:string>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</json:string><json:string>Fonds voor Wetenschappelijk Onderzoek, Belgium</json:string></affiliations></json:item><json:item><name>P Vilain</name><affiliations><json:string>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</json:string><json:string>Fonds National de la Recherche Scientifique, Belgium</json:string></affiliations></json:item><json:item><name>G Wilquet</name><affiliations><json:string>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</json:string><json:string>Now at DESY, Hamburg</json:string></affiliations></json:item><json:item><name>B Saitta</name><affiliations><json:string>Universitdi Cagliari and INFN, Cagliari, Italy</json:string></affiliations></json:item><json:item><name>E Di Capua</name><affiliations><json:string>Universitdi Ferrara and INFN, Ferrara, Italy</json:string></affiliations></json:item><json:item><name>S Ogawa</name><affiliations><json:string>Toho University, Funabashi, Japan</json:string></affiliations></json:item><json:item><name>H Shibuya</name><affiliations><json:string>Toho University, Funabashi, Japan</json:string></affiliations></json:item><json:item><name>I R Hristova</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string><json:string>Now at DESY, Hamburg</json:string></affiliations></json:item><json:item><name>T Kawamura</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>D Kolev</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string><json:string>On leave of absence and at St. Kliment Ohridski University of Sofia, Bulgaria</json:string></affiliations></json:item><json:item><name>H Meinhard</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>J Panman</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>A Rozanov</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string><json:string>Now at CPPM CNRS-IN2P3, Marseille, France</json:string></affiliations></json:item><json:item><name>R Tsenov</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string><json:string>Now at CPPM CNRS-IN2P3, Marseille, France</json:string></affiliations></json:item><json:item><name>J W E Uiterwijk</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string></affiliations></json:item><json:item><name>P Zucchelli</name><affiliations><json:string>CERN, Geneva, Switzerland</json:string><json:string>On leave of absence from INFN, Ferrara, Italy</json:string></affiliations></json:item><json:item><name>J Goldberg</name><affiliations><json:string>Technion, Haifa, Israel</json:string></affiliations></json:item><json:item><name>M Chikawa</name><affiliations><json:string>Kinki University, Higashioaka, Japan</json:string></affiliations></json:item><json:item><name>J S Song</name><affiliations><json:string>Gyeongsang National University, Jinju, Korea</json:string></affiliations></json:item><json:item><name>C S Yoon</name><affiliations><json:string>Gyeongsang National University, Jinju, Korea</json:string></affiliations></json:item><json:item><name>K Kodama</name><affiliations><json:string>Aichi University of Education, Kariya, Japan</json:string></affiliations></json:item><json:item><name>N Ushida</name><affiliations><json:string>Aichi University of Education, Kariya, Japan</json:string></affiliations></json:item><json:item><name>S Aoki</name><affiliations><json:string>Kobe University, Kobe, Japan</json:string></affiliations></json:item><json:item><name>T Hara</name><affiliations><json:string>Kobe University, Kobe, Japan</json:string></affiliations></json:item><json:item><name>T Delbar</name><affiliations><json:string>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</json:string></affiliations></json:item><json:item><name>D Favart</name><affiliations><json:string>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</json:string></affiliations></json:item><json:item><name>G Grgoire</name><affiliations><json:string>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</json:string></affiliations></json:item><json:item><name>S Kalinin</name><affiliations><json:string>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</json:string></affiliations></json:item><json:item><name>I Makhlioueva</name><affiliations><json:string>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</json:string></affiliations></json:item><json:item><name>A Artamonov</name><affiliations><json:string>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</json:string></affiliations></json:item><json:item><name>P Gorbunov</name><affiliations><json:string>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</json:string></affiliations></json:item><json:item><name>V Khovansky</name><affiliations><json:string>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</json:string></affiliations></json:item><json:item><name>V Shamanov</name><affiliations><json:string>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</json:string></affiliations></json:item><json:item><name>I Tsukerman</name><affiliations><json:string>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</json:string></affiliations></json:item><json:item><name>N Bruski</name><affiliations><json:string>Westflische Wilhelms-Universitt, Mnster, Germany</json:string></affiliations></json:item><json:item><name>D Frekers</name><affiliations><json:string>Westflische Wilhelms-Universitt, Mnster, Germany</json:string></affiliations></json:item><json:item><name>K Hoshino</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>J Kawada</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string><json:string>Now at University of Bern, Switzerland</json:string></affiliations></json:item><json:item><name>M Komatsu</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>M Miyanishi</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>M Nakamura</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>T Nakano</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>K Narita</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>K Niu</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>K Niwa</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>N Nonaka</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>O Sato</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>T Toshito</name><affiliations><json:string>Nagoya University, Nagoya, Japan</json:string></affiliations></json:item><json:item><name>S Buontempo</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>A G Cocco</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>N D'Ambrosio</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>G De Lellis</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>G De Rosa</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>F Di Capua</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string><json:string>Author to whom any correspondence should be addressed</json:string><json:string>E-mail: dicapua@na.infn.it</json:string></affiliations></json:item><json:item><name>G Fiorillo</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>A Marotta</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>M Messina</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>P Migliozzi</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>L Scotto Lavina</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>P Strolin</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>V Tioukov</name><affiliations><json:string>UniversitFederico II and INFN, Naples, Italy</json:string></affiliations></json:item><json:item><name>T Okusawa</name><affiliations><json:string>Osaka City University, Osaka, Japan</json:string></affiliations></json:item><json:item><name>U Dore</name><affiliations><json:string>UniversitLa Sapienza and INFN, Rome, Italy</json:string></affiliations></json:item><json:item><name>P F Loverre</name><affiliations><json:string>UniversitLa Sapienza and INFN, Rome, Italy</json:string></affiliations></json:item><json:item><name>L Ludovici</name><affiliations><json:string>UniversitLa Sapienza and INFN, Rome, Italy</json:string></affiliations></json:item><json:item><name>G Rosa</name><affiliations><json:string>UniversitLa Sapienza and INFN, Rome, Italy</json:string></affiliations></json:item><json:item><name>R Santacesaria</name><affiliations><json:string>UniversitLa Sapienza and INFN, Rome, Italy</json:string></affiliations></json:item><json:item><name>A Satta</name><affiliations><json:string>UniversitLa Sapienza and INFN, Rome, Italy</json:string></affiliations></json:item><json:item><name>F R Spada</name><affiliations><json:string>UniversitLa Sapienza and INFN, Rome, Italy</json:string></affiliations></json:item><json:item><name>E Barbuto</name><affiliations><json:string>Universitdi Salerno and INFN, Salerno, Italy</json:string></affiliations></json:item><json:item><name>C Bozza</name><affiliations><json:string>Universitdi Salerno and INFN, Salerno, Italy</json:string></affiliations></json:item><json:item><name>G Grella</name><affiliations><json:string>Universitdi Salerno and INFN, Salerno, Italy</json:string></affiliations></json:item><json:item><name>G Romano</name><affiliations><json:string>Universitdi Salerno and INFN, Salerno, Italy</json:string></affiliations></json:item><json:item><name>C Sirignano</name><affiliations><json:string>Universitdi Salerno and INFN, Salerno, Italy</json:string></affiliations></json:item><json:item><name>S Sorrentino</name><affiliations><json:string>Universitdi Salerno and INFN, Salerno, Italy</json:string></affiliations></json:item><json:item><name>Y Sato</name><affiliations><json:string>Utsunomiya University, Utsunomiya, Japan</json:string></affiliations></json:item><json:item><name>I Tezuka</name><affiliations><json:string>Utsunomiya University, Utsunomiya, Japan</json:string></affiliations></json:item></author><language><json:string>eng</json:string></language><originalGenre><json:string>paper</json:string></originalGenre><abstract>The nuclear emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27GeV average neutrino energy from 1994 to 1997. In total, about 100000 charged-current (CC) neutrino interactions with at least one identified muon were located in the emulsion target and fully reconstructed, using newly developed automated scanning systems. Charmed particles were searched for by a program recognizing particle decays. The observation of the decay in nuclear emulsion makes it possible to select a sample with very low background and minimal kinematical bias. In all, 2013 CC interactions with a charmed hadron candidate in the final state were selected and confirmed through visual inspection. The charm production rate induced by neutrinos relative to the CC cross-section is measured to be (NCX)/(CC)(5.750.32(stat)0.30(syst)). The charm production cross-section as a function of neutrino energy is also obtained. The results are in good agreement with previous measurements. The charm-quark hadronization produces the following charmed hadrons with relative fractions (in ): fD043.74.5, fc19.24.2, fD25.34.2 and fDs11.84.7.</abstract><qualityIndicators><score>7.528</score><pdfVersion>1.4</pdfVersion><pdfPageSize>595.276 x 841.89 pts (A4)</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>0</keywordCount><abstractCharCount>1159</abstractCharCount><pdfWordCount>5622</pdfWordCount><pdfCharCount>32120</pdfCharCount><pdfPageCount>15</pdfPageCount><abstractWordCount>169</abstractWordCount></qualityIndicators><title>Measurement of charm production in neutrino charged-current interactions</title><genre><json:string>research-article</json:string></genre><host><volume>13</volume><publisherId><json:string>nj</json:string></publisherId><pages><total>15</total><last>15</last><first>1</first></pages><issn><json:string>1367-2630</json:string></issn><issue>9</issue><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>1367-2630</json:string></eissn><title>New Journal of Physics</title></host><publicationDate>2011</publicationDate><copyrightDate>2011</copyrightDate><doi><json:string>10.1088/1367-2630/13/9/093002</json:string></doi><id>9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD</id><score>0.2186739</score><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Measurement of charm production in neutrino charged-current interactions</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>IOP Publishing</publisher><availability><p>IOP Publishing and Deutsche Physikalische Gesellschaft</p></availability><date>2011</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Measurement of charm production in neutrino charged-current interactions</title><author xml:id="author-1"><persName><forename type="first">A</forename><surname>Kayis-Topaksu</surname></persName><affiliation>ukurova University, Adana, Turkey</affiliation></author><author xml:id="author-2"><persName><forename type="first">G</forename><surname>nengt</surname></persName><affiliation>ukurova University, Adana, Turkey</affiliation></author><author xml:id="author-3"><persName><forename type="first">R</forename><surname>van Dantzig</surname></persName><affiliation>NIKHEF, Amsterdam, The Netherlands</affiliation></author><author xml:id="author-4"><persName><forename type="first">M</forename><surname>de Jong</surname></persName><affiliation>NIKHEF, Amsterdam, The Netherlands</affiliation></author><author xml:id="author-5"><persName><forename type="first">R G C</forename><surname>Oldeman</surname></persName><affiliation>NIKHEF, Amsterdam, The Netherlands</affiliation><affiliation>Now at Universitdi Cagliari and INFN, Cagliari, Italy</affiliation></author><author xml:id="author-6"><persName><forename type="first">M</forename><surname>Gler</surname></persName><affiliation>METU, Ankara, Turkey</affiliation></author><author xml:id="author-7"><persName><forename type="first">U</forename><surname>Kse</surname></persName><affiliation>METU, Ankara, Turkey</affiliation></author><author xml:id="author-8"><persName><forename type="first">P</forename><surname>Tolun</surname></persName><affiliation>METU, Ankara, Turkey</affiliation></author><author xml:id="author-9"><persName><forename type="first">M G</forename><surname>Catanesi</surname></persName><affiliation>Universitdi Bari and INFN, Bari, Italy</affiliation></author><author xml:id="author-10"><persName><forename type="first">M T</forename><surname>Muciaccia</surname></persName><affiliation>Universitdi Bari and INFN, Bari, Italy</affiliation></author><author xml:id="author-11"><persName><forename type="first">K</forename><surname>Winter</surname></persName><affiliation>Humboldt Universitt, Berlin, Germany</affiliation></author><author xml:id="author-12"><persName><forename type="first">B</forename><surname>Van de Vyver</surname></persName><affiliation>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</affiliation><affiliation>Fonds voor Wetenschappelijk Onderzoek, Belgium</affiliation></author><author xml:id="author-13"><persName><forename type="first">P</forename><surname>Vilain</surname></persName><affiliation>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</affiliation><affiliation>Fonds National de la Recherche Scientifique, Belgium</affiliation></author><author xml:id="author-14"><persName><forename type="first">G</forename><surname>Wilquet</surname></persName><affiliation>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</affiliation><affiliation>Now at DESY, Hamburg</affiliation></author><author xml:id="author-15"><persName><forename type="first">B</forename><surname>Saitta</surname></persName><affiliation>Universitdi Cagliari and INFN, Cagliari, Italy</affiliation></author><author xml:id="author-16"><persName><forename type="first">E</forename><surname>Di Capua</surname></persName><affiliation>Universitdi Ferrara and INFN, Ferrara, Italy</affiliation></author><author xml:id="author-17"><persName><forename type="first">S</forename><surname>Ogawa</surname></persName><affiliation>Toho University, Funabashi, Japan</affiliation></author><author xml:id="author-18"><persName><forename type="first">H</forename><surname>Shibuya</surname></persName><affiliation>Toho University, Funabashi, Japan</affiliation></author><author xml:id="author-19"><persName><forename type="first">I R</forename><surname>Hristova</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>Now at DESY, Hamburg</affiliation></author><author xml:id="author-20"><persName><forename type="first">T</forename><surname>Kawamura</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-21"><persName><forename type="first">D</forename><surname>Kolev</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>On leave of absence and at St. Kliment Ohridski University of Sofia, Bulgaria</affiliation></author><author xml:id="author-22"><persName><forename type="first">H</forename><surname>Meinhard</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-23"><persName><forename type="first">J</forename><surname>Panman</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-24"><persName><forename type="first">A</forename><surname>Rozanov</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>Now at CPPM CNRS-IN2P3, Marseille, France</affiliation></author><author xml:id="author-25"><persName><forename type="first">R</forename><surname>Tsenov</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>Now at CPPM CNRS-IN2P3, Marseille, France</affiliation></author><author xml:id="author-26"><persName><forename type="first">J W E</forename><surname>Uiterwijk</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation></author><author xml:id="author-27"><persName><forename type="first">P</forename><surname>Zucchelli</surname></persName><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>On leave of absence from INFN, Ferrara, Italy</affiliation></author><author xml:id="author-28"><persName><forename type="first">J</forename><surname>Goldberg</surname></persName><affiliation>Technion, Haifa, Israel</affiliation></author><author xml:id="author-29"><persName><forename type="first">M</forename><surname>Chikawa</surname></persName><affiliation>Kinki University, Higashioaka, Japan</affiliation></author><author xml:id="author-30"><persName><forename type="first">J S</forename><surname>Song</surname></persName><affiliation>Gyeongsang National University, Jinju, Korea</affiliation></author><author xml:id="author-31"><persName><forename type="first">C S</forename><surname>Yoon</surname></persName><affiliation>Gyeongsang National University, Jinju, Korea</affiliation></author><author xml:id="author-32"><persName><forename type="first">K</forename><surname>Kodama</surname></persName><affiliation>Aichi University of Education, Kariya, Japan</affiliation></author><author xml:id="author-33"><persName><forename type="first">N</forename><surname>Ushida</surname></persName><affiliation>Aichi University of Education, Kariya, Japan</affiliation></author><author xml:id="author-34"><persName><forename type="first">S</forename><surname>Aoki</surname></persName><affiliation>Kobe University, Kobe, Japan</affiliation></author><author xml:id="author-35"><persName><forename type="first">T</forename><surname>Hara</surname></persName><affiliation>Kobe University, Kobe, Japan</affiliation></author><author xml:id="author-36"><persName><forename type="first">T</forename><surname>Delbar</surname></persName><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation></author><author xml:id="author-37"><persName><forename type="first">D</forename><surname>Favart</surname></persName><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation></author><author xml:id="author-38"><persName><forename type="first">G</forename><surname>Grgoire</surname></persName><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation></author><author xml:id="author-39"><persName><forename type="first">S</forename><surname>Kalinin</surname></persName><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation></author><author xml:id="author-40"><persName><forename type="first">I</forename><surname>Makhlioueva</surname></persName><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation></author><author xml:id="author-41"><persName><forename type="first">A</forename><surname>Artamonov</surname></persName><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation></author><author xml:id="author-42"><persName><forename type="first">P</forename><surname>Gorbunov</surname></persName><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation></author><author xml:id="author-43"><persName><forename type="first">V</forename><surname>Khovansky</surname></persName><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation></author><author xml:id="author-44"><persName><forename type="first">V</forename><surname>Shamanov</surname></persName><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation></author><author xml:id="author-45"><persName><forename type="first">I</forename><surname>Tsukerman</surname></persName><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation></author><author xml:id="author-46"><persName><forename type="first">N</forename><surname>Bruski</surname></persName><affiliation>Westflische Wilhelms-Universitt, Mnster, Germany</affiliation></author><author xml:id="author-47"><persName><forename type="first">D</forename><surname>Frekers</surname></persName><affiliation>Westflische Wilhelms-Universitt, Mnster, Germany</affiliation></author><author xml:id="author-48"><persName><forename type="first">K</forename><surname>Hoshino</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-49"><persName><forename type="first">J</forename><surname>Kawada</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation><affiliation>Now at University of Bern, Switzerland</affiliation></author><author xml:id="author-50"><persName><forename type="first">M</forename><surname>Komatsu</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-51"><persName><forename type="first">M</forename><surname>Miyanishi</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-52"><persName><forename type="first">M</forename><surname>Nakamura</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-53"><persName><forename type="first">T</forename><surname>Nakano</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-54"><persName><forename type="first">K</forename><surname>Narita</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-55"><persName><forename type="first">K</forename><surname>Niu</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-56"><persName><forename type="first">K</forename><surname>Niwa</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-57"><persName><forename type="first">N</forename><surname>Nonaka</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-58"><persName><forename type="first">O</forename><surname>Sato</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-59"><persName><forename type="first">T</forename><surname>Toshito</surname></persName><affiliation>Nagoya University, Nagoya, Japan</affiliation></author><author xml:id="author-60"><persName><forename type="first">S</forename><surname>Buontempo</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-61"><persName><forename type="first">A G</forename><surname>Cocco</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-62"><persName><forename type="first">N</forename><surname>D'Ambrosio</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-63"><persName><forename type="first">G</forename><surname>De Lellis</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-64"><persName><forename type="first">G</forename><surname>De Rosa</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-65"><persName><forename type="first">F</forename><surname>Di Capua</surname></persName><email>dicapua@na.infn.it</email><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><affiliation>Author to whom any correspondence should be addressed</affiliation></author><author xml:id="author-66"><persName><forename type="first">G</forename><surname>Fiorillo</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-67"><persName><forename type="first">A</forename><surname>Marotta</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-68"><persName><forename type="first">M</forename><surname>Messina</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-69"><persName><forename type="first">P</forename><surname>Migliozzi</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-70"><persName><forename type="first">L</forename><surname>Scotto Lavina</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-71"><persName><forename type="first">P</forename><surname>Strolin</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-72"><persName><forename type="first">V</forename><surname>Tioukov</surname></persName><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation></author><author xml:id="author-73"><persName><forename type="first">T</forename><surname>Okusawa</surname></persName><affiliation>Osaka City University, Osaka, Japan</affiliation></author><author xml:id="author-74"><persName><forename type="first">U</forename><surname>Dore</surname></persName><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation></author><author xml:id="author-75"><persName><forename type="first">P F</forename><surname>Loverre</surname></persName><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation></author><author xml:id="author-76"><persName><forename type="first">L</forename><surname>Ludovici</surname></persName><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation></author><author xml:id="author-77"><persName><forename type="first">G</forename><surname>Rosa</surname></persName><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation></author><author xml:id="author-78"><persName><forename type="first">R</forename><surname>Santacesaria</surname></persName><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation></author><author xml:id="author-79"><persName><forename type="first">A</forename><surname>Satta</surname></persName><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation></author><author xml:id="author-80"><persName><forename type="first">F R</forename><surname>Spada</surname></persName><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation></author><author xml:id="author-81"><persName><forename type="first">E</forename><surname>Barbuto</surname></persName><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation></author><author xml:id="author-82"><persName><forename type="first">C</forename><surname>Bozza</surname></persName><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation></author><author xml:id="author-83"><persName><forename type="first">G</forename><surname>Grella</surname></persName><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation></author><author xml:id="author-84"><persName><forename type="first">G</forename><surname>Romano</surname></persName><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation></author><author xml:id="author-85"><persName><forename type="first">C</forename><surname>Sirignano</surname></persName><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation></author><author xml:id="author-86"><persName><forename type="first">S</forename><surname>Sorrentino</surname></persName><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation></author><author xml:id="author-87"><persName><forename type="first">Y</forename><surname>Sato</surname></persName><affiliation>Utsunomiya University, Utsunomiya, Japan</affiliation></author><author xml:id="author-88"><persName><forename type="first">I</forename><surname>Tezuka</surname></persName><affiliation>Utsunomiya University, Utsunomiya, Japan</affiliation></author></analytic><monogr><title level="j">New Journal of Physics</title><title level="j" type="abbrev">New J. Phys.</title><idno type="pISSN">1367-2630</idno><idno type="eISSN">1367-2630</idno><imprint><publisher>IOP Publishing</publisher><date type="published" when="2011"></date><biblScope unit="volume">13</biblScope><biblScope unit="issue">9</biblScope><biblScope unit="page" from="1">1</biblScope><biblScope unit="page" to="15">15</biblScope></imprint></monogr><idno type="istex">9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD</idno><idno type="DOI">10.1088/1367-2630/13/9/093002</idno><idno type="articleID">399459</idno><idno type="articleNumber">093002</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2011</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>The nuclear emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27GeV average neutrino energy from 1994 to 1997. In total, about 100000 charged-current (CC) neutrino interactions with at least one identified muon were located in the emulsion target and fully reconstructed, using newly developed automated scanning systems. Charmed particles were searched for by a program recognizing particle decays. The observation of the decay in nuclear emulsion makes it possible to select a sample with very low background and minimal kinematical bias. In all, 2013 CC interactions with a charmed hadron candidate in the final state were selected and confirmed through visual inspection. The charm production rate induced by neutrinos relative to the CC cross-section is measured to be (NCX)/(CC)(5.750.32(stat)0.30(syst)). The charm production cross-section as a function of neutrino energy is also obtained. The results are in good agreement with previous measurements. The charm-quark hadronization produces the following charmed hadrons with relative fractions (in ): fD043.74.5, fc19.24.2, fD25.34.2 and fDs11.84.7.</p></abstract></profileDesc><revisionDesc><change when="2011">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="corpus iop not found" wicri:toSee="no header"><istex:xmlDeclaration>version="1.0" encoding="ISO-8859-1" </istex:xmlDeclaration><istex:docType SYSTEM="http://ej.iop.org/dtd/iopv1_5_2.dtd" name="istex:docType"></istex:docType><istex:document><article artid="nj399459"><article-metadata><jnl-data jnlid="nj"><jnl-fullname>New Journal of Physics</jnl-fullname><jnl-abbreviation>New J. Phys.</jnl-abbreviation><jnl-shortname>NJP</jnl-shortname><jnl-issn>1367-2630</jnl-issn><jnl-coden>NJOPFM</jnl-coden><jnl-imprint>IOP Publishing</jnl-imprint><jnl-web-address>stacks.iop.org/NJP</jnl-web-address></jnl-data><volume-data><year-publication>2011</year-publication><volume-number>13</volume-number></volume-data><issue-data><issue-number>9</issue-number><coverdate>September 2011</coverdate></issue-data><article-data><article-type type="paper" sort="regular"></article-type><type-number type="paper" numbering="article" artnum="093002">093002</type-number><article-number>399459</article-number><first-page>1</first-page><last-page>15</last-page><length>15</length><pii></pii><doi>10.1088/1367-2630/13/9/093002</doi><copyright>IOP Publishing and Deutsche Physikalische Gesellschaft</copyright><ccc>1367-2630/11/093002+15$33.00</ccc><printed></printed></article-data></article-metadata><header><title-group><title>Measurement of charm production in neutrino charged-current interactions</title><short-title>Measurement of charm production in neutrino charged-current interactions</short-title><ej-title>Measurement of charm production in neutrino charged-current interactions</ej-title></title-group><author-group><author address="nj399459ad1"><first-names>A</first-names><second-name>Kayis-Topaksu</second-name></author><author address="nj399459ad1"><first-names>G</first-names><second-name>Önengüt</second-name></author><author address="nj399459ad2"><first-names>R</first-names><second-name>van Dantzig</second-name></author><author address="nj399459ad2"><first-names>M</first-names><second-name>de Jong</second-name></author><author address="nj399459ad2" second-address="nj399459ad25"><first-names>R G C</first-names><second-name>Oldeman</second-name></author><author address="nj399459ad3"><first-names>M</first-names><second-name>Güler</second-name></author><author address="nj399459ad3"><first-names>U</first-names><second-name>Köse</second-name></author><author address="nj399459ad3"><first-names>P</first-names><second-name>Tolun</second-name></author><author address="nj399459ad4"><first-names>M G</first-names><second-name>Catanesi</second-name></author><author address="nj399459ad4"><first-names>M T</first-names><second-name>Muciaccia</second-name></author><author address="nj399459ad5"><first-names>K</first-names><second-name>Winter</second-name></author><author address="nj399459ad6" second-address="nj399459ad26"><first-names>B</first-names><second-name>Van de Vyver</second-name></author><author address="nj399459ad6" second-address="nj399459ad27"><first-names>P</first-names><second-name>Vilain</second-name></author><author address="nj399459ad6" second-address="nj399459ad28"><first-names>G</first-names><second-name>Wilquet</second-name></author><author address="nj399459ad7"><first-names>B</first-names><second-name>Saitta</second-name></author><author address="nj399459ad8"><first-names>E</first-names><second-name>Di Capua</second-name></author><author address="nj399459ad9"><first-names>S</first-names><second-name>Ogawa</second-name></author><author address="nj399459ad9"><first-names>H</first-names><second-name>Shibuya</second-name></author><author address="nj399459ad10" second-address="nj399459ad28"><first-names>I R</first-names><second-name>Hristova</second-name></author><author address="nj399459ad10"><first-names>T</first-names><second-name>Kawamura</second-name></author><author address="nj399459ad10" second-address="nj399459ad29"><first-names>D</first-names><second-name>Kolev</second-name></author><author address="nj399459ad10"><first-names>H</first-names><second-name>Meinhard</second-name></author><author address="nj399459ad10"><first-names>J</first-names><second-name>Panman</second-name></author><author address="nj399459ad10" second-address="nj399459ad30"><first-names>A</first-names><second-name>Rozanov</second-name></author><author address="nj399459ad10" second-address="nj399459ad30"><first-names>R</first-names><second-name>Tsenov</second-name></author><author address="nj399459ad10"><first-names>J W E</first-names><second-name>Uiterwijk</second-name></author><author address="nj399459ad10" second-address="nj399459ad31"><first-names>P</first-names><second-name>Zucchelli</second-name></author><author address="nj399459ad11"><first-names>J</first-names><second-name>Goldberg</second-name></author><author address="nj399459ad12"><first-names>M</first-names><second-name>Chikawa</second-name></author><author address="nj399459ad13"><first-names>J S</first-names><second-name>Song</second-name></author><author address="nj399459ad13"><first-names>C S</first-names><second-name>Yoon</second-name></author><author address="nj399459ad14"><first-names>K</first-names><second-name>Kodama</second-name></author><author address="nj399459ad14"><first-names>N</first-names><second-name>Ushida</second-name></author><author address="nj399459ad15"><first-names>S</first-names><second-name>Aoki</second-name></author><author address="nj399459ad15"><first-names>T</first-names><second-name>Hara</second-name></author><author address="nj399459ad16"><first-names>T</first-names><second-name>Delbar</second-name></author><author address="nj399459ad16"><first-names>D</first-names><second-name>Favart</second-name></author><author address="nj399459ad16"><first-names>G</first-names><second-name>Grégoire</second-name></author><author address="nj399459ad16"><first-names>S</first-names><second-name>Kalinin</second-name></author><author address="nj399459ad16"><first-names>I</first-names><second-name>Makhlioueva</second-name></author><author address="nj399459ad17"><first-names>A</first-names><second-name>Artamonov</second-name></author><author address="nj399459ad17"><first-names>P</first-names><second-name>Gorbunov</second-name></author><author address="nj399459ad17"><first-names>V</first-names><second-name>Khovansky</second-name></author><author address="nj399459ad17"><first-names>V</first-names><second-name>Shamanov</second-name></author><author address="nj399459ad17"><first-names>I</first-names><second-name>Tsukerman</second-name></author><author address="nj399459ad18"><first-names>N</first-names><second-name>Bruski</second-name></author><author address="nj399459ad18"><first-names>D</first-names><second-name>Frekers</second-name></author><author address="nj399459ad19"><first-names>K</first-names><second-name>Hoshino</second-name></author><author address="nj399459ad19" second-address="nj399459ad32"><first-names>J</first-names><second-name>Kawada</second-name></author><author address="nj399459ad19"><first-names>M</first-names><second-name>Komatsu</second-name></author><author address="nj399459ad19"><first-names>M</first-names><second-name>Miyanishi</second-name></author><author address="nj399459ad19"><first-names>M</first-names><second-name>Nakamura</second-name></author><author address="nj399459ad19"><first-names>T</first-names><second-name>Nakano</second-name></author><author address="nj399459ad19"><first-names>K</first-names><second-name>Narita</second-name></author><author address="nj399459ad19"><first-names>K</first-names><second-name>Niu</second-name></author><author address="nj399459ad19"><first-names>K</first-names><second-name>Niwa</second-name></author><author address="nj399459ad19"><first-names>N</first-names><second-name>Nonaka</second-name></author><author address="nj399459ad19"><first-names>O</first-names><second-name>Sato</second-name></author><author address="nj399459ad19"><first-names>T</first-names><second-name>Toshito</second-name></author><author address="nj399459ad20"><first-names>S</first-names><second-name>Buontempo</second-name></author><author address="nj399459ad20"><first-names>A G</first-names><second-name>Cocco</second-name></author><author address="nj399459ad20"><first-names>N</first-names><second-name>D'Ambrosio</second-name></author><author address="nj399459ad20"><first-names>G</first-names><second-name>De Lellis</second-name></author><author address="nj399459ad20"><first-names>G</first-names><second-name>De Rosa</second-name></author><author address="nj399459ad20" alt-address="nj399459aad33" email="nj399459ea1"><first-names>F</first-names><second-name>Di Capua</second-name></author><author address="nj399459ad20"><first-names>G</first-names><second-name>Fiorillo</second-name></author><author address="nj399459ad20"><first-names>A</first-names><second-name>Marotta</second-name></author><author address="nj399459ad20"><first-names>M</first-names><second-name>Messina</second-name></author><author address="nj399459ad20"><first-names>P</first-names><second-name>Migliozzi</second-name></author><author address="nj399459ad20"><first-names>L</first-names><second-name>Scotto Lavina</second-name></author><author address="nj399459ad20"><first-names>P</first-names><second-name>Strolin</second-name></author><author address="nj399459ad20"><first-names>V</first-names><second-name>Tioukov</second-name></author><author address="nj399459ad21"><first-names>T</first-names><second-name>Okusawa</second-name></author><author address="nj399459ad22"><first-names>U</first-names><second-name>Dore</second-name></author><author address="nj399459ad22"><first-names>P F</first-names><second-name>Loverre</second-name></author><author address="nj399459ad22"><first-names>L</first-names><second-name>Ludovici</second-name></author><author address="nj399459ad22"><first-names>G</first-names><second-name>Rosa</second-name></author><author address="nj399459ad22"><first-names>R</first-names><second-name>Santacesaria</second-name></author><author address="nj399459ad22"><first-names>A</first-names><second-name>Satta</second-name></author><author address="nj399459ad22"><first-names>F R</first-names><second-name>Spada</second-name></author><author address="nj399459ad23"><first-names>E</first-names><second-name>Barbuto</second-name></author><author address="nj399459ad23"><first-names>C</first-names><second-name>Bozza</second-name></author><author address="nj399459ad23"><first-names>G</first-names><second-name>Grella</second-name></author><author address="nj399459ad23"><first-names>G</first-names><second-name>Romano</second-name></author><author address="nj399459ad23"><first-names>C</first-names><second-name>Sirignano</second-name></author><author address="nj399459ad23"><first-names>S</first-names><second-name>Sorrentino</second-name></author><author address="nj399459ad24"><first-names>Y</first-names><second-name>Sato</second-name></author><author address="nj399459ad24"><first-names>I</first-names><second-name>Tezuka</second-name></author><short-author-list>A Kayis-Topaksu <italic>et al</italic></short-author-list></author-group><address-group><address id="nj399459ad1" showid="yes"><orgname>Çukurova University</orgname>, Adana, <country>Turkey</country></address><address id="nj399459ad2" showid="yes"><orgname>NIKHEF</orgname>, Amsterdam, <country>The Netherlands</country></address><address id="nj399459ad3" showid="yes"><orgname>METU</orgname>, Ankara, <country>Turkey</country></address><address id="nj399459ad4" showid="yes"><orgname>Università di Bari and INFN</orgname>, Bari, <country>Italy</country></address><address id="nj399459ad5" showid="yes"><orgname>Humboldt Universität</orgname>, Berlin, <country>Germany</country></address><address id="nj399459ad6" showid="yes"><orgname>Inter-University Institute for High Energies (ULB-VUB) Brussels</orgname>, <country>Belgium</country></address><address id="nj399459ad7" showid="yes"><orgname>Università di Cagliari and INFN</orgname>, Cagliari, <country>Italy</country></address><address id="nj399459ad8" showid="yes"><orgname>Università di Ferrara and INFN</orgname>, Ferrara, <country>Italy</country></address><address id="nj399459ad9" showid="yes"><orgname>Toho University</orgname>, Funabashi, <country>Japan</country></address><address id="nj399459ad10" showid="yes"><orgname>CERN</orgname>, Geneva, <country>Switzerland</country></address><address id="nj399459ad11" showid="yes"><orgname>Technion</orgname>, Haifa, <country>Israel</country></address><address id="nj399459ad12" showid="yes"><orgname>Kinki University</orgname>, Higashioaka, <country>Japan</country></address><address id="nj399459ad13" showid="yes"><orgname>Gyeongsang National University</orgname>, Jinju, <country>Korea</country></address><address id="nj399459ad14" showid="yes"><orgname>Aichi University of Education</orgname>, Kariya, <country>Japan</country></address><address id="nj399459ad15" showid="yes"><orgname>Kobe University</orgname>, Kobe, <country>Japan</country></address><address id="nj399459ad16" showid="yes"><orgname>Université Catholique de Louvain</orgname>, Louvain-la-Neuve, <country>Belgium</country></address><address id="nj399459ad17" showid="yes"><orgname>Institute for Theoretical and Experimental Physics</orgname>, Moscow, <country>Russian Federation</country></address><address id="nj399459ad18" showid="yes"><orgname>Westfälische Wilhelms-Universität</orgname>, Münster, <country>Germany</country></address><address id="nj399459ad19" showid="yes"><orgname>Nagoya University</orgname>, Nagoya, <country>Japan</country></address><address id="nj399459ad20" showid="yes"><orgname>Università Federico II and INFN</orgname>, Naples, <country>Italy</country></address><address id="nj399459ad21" showid="yes"><orgname>Osaka City University</orgname>, Osaka, <country>Japan</country></address><address id="nj399459ad22" showid="yes"><orgname>Università La Sapienza and INFN</orgname>, Rome, <country>Italy</country></address><address id="nj399459ad23" showid="yes"><orgname>Università di Salerno and INFN</orgname>, Salerno, <country>Italy</country></address><address id="nj399459ad24" showid="yes"><orgname>Utsunomiya University</orgname>, Utsunomiya, <country>Japan</country></address><address id="nj399459ad25" showid="yes">Now at <orgname>Università di Cagliari and INFN</orgname>, Cagliari, <country>Italy</country></address><address id="nj399459ad26" showid="yes"><orgname>Fonds voor Wetenschappelijk Onderzoek</orgname>, <country>Belgium</country></address><address id="nj399459ad27" showid="yes"><orgname>Fonds National de la Recherche Scientifique</orgname>, <country>Belgium</country></address><address id="nj399459ad28" showid="yes">Now at <orgname>DESY</orgname>, <country>Hamburg</country></address><address id="nj399459ad29" showid="yes">On leave of absence and at <orgname>St. Kliment Ohridski University of Sofia</orgname>, <country>Bulgaria</country></address><address id="nj399459ad30" showid="yes">Now at <orgname>CPPM CNRS-IN2P3</orgname>, Marseille, <country>France</country></address><address id="nj399459ad31" showid="yes">On leave of absence from <orgname>INFN</orgname>, Ferrara, <country>Italy</country></address><address id="nj399459ad32" showid="yes">Now at <orgname>University of Bern</orgname>, <country>Switzerland</country></address><address id="nj399459aad33" alt="yes" showid="yes">Author to whom any correspondence should be addressed</address><e-address id="nj399459ea1"><email mailto="dicapua@na.infn.it">dicapua@na.infn.it</email></e-address></address-group><history received="4 July 2011" online="1 September 2011"></history><abstract-group><abstract><heading>Abstract</heading><p indent="no">The nuclear emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27 GeV average neutrino energy from 1994 to 1997. In total, about 100 000 charged-current (CC) neutrino interactions with at least one identified muon were located in the emulsion target and fully reconstructed, using newly developed automated scanning systems. Charmed particles were searched for by a program recognizing particle decays. The observation of the decay in nuclear emulsion makes it possible to select a sample with very low background and minimal kinematical bias. In all, 2013 CC interactions with a charmed hadron candidate in the final state were selected and confirmed through visual inspection. The charm production rate induced by neutrinos relative to the CC cross-section is measured to be <inline-eqn><math-text>σ(ν<sub>μ</sub><italic>N</italic>→μ<sup>−</sup><italic>CX</italic>)/σ(<upright>CC</upright>)=(5.75 ± 0.32(<upright>stat</upright>)±0.30(<upright>syst</upright>))%</math-text></inline-eqn>. The charm production cross-section as a function of neutrino energy is also obtained. The results are in good agreement with previous measurements. The charm-quark hadronization produces the following charmed hadrons with relative fractions (in %): <inline-eqn><math-text><italic>f</italic><sub><upright>D</upright><sup>0</sup></sub>=43.7±4.5</math-text></inline-eqn>, <inline-eqn><math-text><italic>f</italic><sub><upright>Λ<sub><upright>c</upright></sub><sup>+</sup></upright></sub>=19.2±4.2</math-text></inline-eqn>, <inline-eqn><math-text><italic>f</italic><sub><upright>D</upright><sup>+</sup></sub>=25.3±4.2</math-text></inline-eqn> and <inline-eqn><math-text><italic>f</italic><sub><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></sub>=11.8±4.7</math-text></inline-eqn>.</p></abstract></abstract-group></header><body refstyle="numeric"><sec-level1 id="nj399459s1" label="1"><heading>Physics motivation</heading><p indent="no">About 40 years after the discovery of the charm quark at SLAC [<cite linkend="nj399459bib1">1</cite>] and BNL [<cite linkend="nj399459bib2">2</cite>], and the first observation of charm decay in nuclear emulsion [<cite linkend="nj399459bib3">3</cite>], the study of charmed particles is still a challenging field in particle physics. In particular, neutrino-induced charm production offers the possibility of studying the strange-quark content of the nucleon, measuring ‘directly’ the CKM matrix element <inline-eqn><math-text><italic>V</italic><sub><upright>cd</upright></sub></math-text></inline-eqn> and testing models for charm production and subsequent hadronization. Moreover, neutrinos produce charmed hadrons via specific processes such as quasi-elastic and diffractive scattering, which provide a unique tool for studies of exclusive charm production.</p><p>In addition to its intrinsic interest, an improved knowledge of charm production helps to better understand the charm background in neutrino oscillation experiments where the signal is given by the production of a <inline-eqn><math-text>τ</math-text></inline-eqn> lepton or of muons of apparently ‘wrong’ charge with respect to that expected from neutrino beam helicity, as in ongoing experiments [<cite linkend="nj399459bib4">4</cite>] and at future neutrino facilities [<cite linkend="nj399459bib5">5</cite>].</p><p>Charm production in neutrino and anti-neutrino charged-current (CC) interactions has been studied by several experiments by looking at the presence of two oppositely charged leptons in the final state. In particular, CDHS [<cite linkend="nj399459bib6">6</cite>], CCFR [<cite linkend="nj399459bib7">7</cite>], CHARM [<cite linkend="nj399459bib8">8</cite>], CHARM-II [<cite linkend="nj399459bib9">9</cite>], NuTeV [<cite linkend="nj399459bib10">10</cite>] and CHORUS (using only its electronic detectors) [<cite linkend="nj399459bib11">11</cite>] have collected large statistics of opposite-sign dimuon events. The leading muon is interpreted as originating from the neutrino vertex and the other one, of opposite charge, as being the decay product of the charmed particle. Although massive electronic detectors allow obtaining large statistics, they have some drawbacks. Of the charmed parent, only the decay muon is seen, resulting in an event sample composed of a mixture of all charmed-particle species weighted by their muonic branching ratios. Furthermore, experiments of this type suffer from significant background (<inline-eqn><math-text>∼20%</math-text></inline-eqn>) due to the undetected decay-in-flight of a pion or a kaon. The identification of the primary muon and the decay muon is not unambiguous. Moreover, the kinematic cuts on the energies of the primary and decay muons, required for background reduction, make it difficult to study cross-sections at energies below 20–30 <upright>GeV</upright>.</p><p>Unlike dimuon experiments, BEBC [<cite linkend="nj399459bib12">12</cite>] and NOMAD [<cite linkend="nj399459bib13">13</cite>] were able to recognize specific charm decay modes by reconstructing an invariant mass from the decay daughters. Only a few specific decay modes were selected and thus also a specific parent particle type. CHORUS [<cite linkend="nj399459bib14">14</cite>] took advantage of the spatial resolution of nuclear emulsion to distinguish the charm decay vertex from the primary neutrino interaction vertex. In combination with a measurement of the transverse momentum of one of the decay products, it could select a specific decay mode of <inline-eqn><math-text><upright>D</upright><sup>*+</sup></math-text></inline-eqn> with very low background.</p><p>The use of a hybrid nuclear emulsion detector was pioneered by the E531 [<cite linkend="nj399459bib15">15</cite>] experiment at FNAL. In nuclear emulsion, the different charmed particles are recognized on the basis of their decay topology and short flight length, so that the required kinematic cuts can be quite loose. All decay channels are therefore observed, not only the muonic ones, without requiring knowledge of muonic branching ratios and with very low background. The disadvantage of the low statistics generally obtained in emulsion experiments (122 charm events observed in E531) has been overcome in the CHORUS experiment [<cite linkend="nj399459bib16">16</cite>] by using a massive (770 kg) nuclear emulsion target and automated emulsion scanning [<cite linkend="nj399459bib17">17</cite>, <cite linkend="nj399459bib18">18</cite>]. A high-statistics sample of charm decays in emulsion, more than one order of magnitude larger than in E531, has thus been collected as reported in this paper.</p><p>The CHORUS experiment took data from 1994 to 1997 in the CERN Wide Band Neutrino Beam [<cite linkend="nj399459bib19">19</cite>], which essentially consisted of muon neutrinos. The analysis presented here is based on the complete CHORUS sample of 2013 charm events, confirmed by visual inspection. The visual inspection recognized 1048 events as due to the production of the neutral charmed hadron <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> and 965 events as due to the production of a charged charmed hadron <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn>, <inline-eqn><math-text><upright>D</upright><sup>+</sup></math-text></inline-eqn> or <inline-eqn><math-text><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></math-text></inline-eqn>. The analysis of the <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> events has been reported in a previous publication [<cite linkend="nj399459bib20">20</cite>]. The charged sample is analysed in this paper. The relative contribution of the different charmed hadrons to the total charged sample is obtained from a likelihood approach by using the decay lifetime information.</p><p>The neutral and charged charm production candidates are combined for the measurement of the total charm production rate relative to CC neutrino events averaged on the neutrino energy spectrum as well as of its dependence on neutrino energy.</p></sec-level1><sec-level1 id="nj399459s2" label="2"><heading>Experimental set-up</heading><p indent="no">The CHORUS experiment was designed to investigate neutrino oscillation by searching for <inline-eqn><math-text>ν<sub>τ</sub></math-text></inline-eqn> appearance in the SPS wide-band neutrino beam at CERN through direct observation of <inline-eqn><math-text>τ</math-text></inline-eqn> decay in nuclear emulsions. Since charmed particles have a flight length comparable to that of the <inline-eqn><math-text>τ</math-text></inline-eqn> lepton, the experiment is also suitable for the study of charm production. The detector, described in more detail in [<cite linkend="nj399459bib16">16</cite>], uses a hybrid approach that combines a nuclear emulsion target with electronic detectors.</p><p>The emulsion target, of 770 kg total mass, is segmented along the beam direction in four stacks of <inline-eqn><math-text>1.4×1.4 <upright>m</upright><sup>2</sup></math-text></inline-eqn> transverse area and about 3 cm thickness. It is equipped with high-resolution trackers made out of three interface emulsion sheets and a set of scintillating fibre tracker planes that provide predictions of particle trajectories into the emulsion stack with an accuracy of about <inline-eqn><math-text>150 μ<upright>m</upright></math-text></inline-eqn> in position and <inline-eqn><math-text>2 <upright>mrad</upright></math-text></inline-eqn> in angle.</p><p>The emulsion scanning is performed by computer-controlled, fully automated microscope stages equipped with a CCD camera and a read-out system called ‘track selector’ [<cite linkend="nj399459bib17">17</cite>, <cite linkend="nj399459bib18">18</cite>]. The track-finding efficiency is higher than 98% for track slopes up to 400 mrad.</p><p>Electronic detectors downstream of the emulsion target include a hadron spectrometer, a calorimeter and a muon spectrometer. The hadron spectrometer measures the bending of charged particles inside an air-core magnet. The calorimeter is used to determine the energy and direction of showers. The muon spectrometer provides the charge and momentum of muons and provides a rough measurement of the leakage of hadronic showers out of the calorimeter. Several planes of scintillator hodoscopes are used for triggering the data acquisition system [<cite linkend="nj399459bib21">21</cite>].</p></sec-level1><sec-level1 id="nj399459s3" label="3"><heading>Data collection</heading><p indent="no">The CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS during the years 1994–1997, with an integrated flux of <inline-eqn><math-text>5.06×10<sup>19</sup></math-text></inline-eqn> protons on target. The beam, of 27 GeV average energy, consists mainly of <inline-eqn><math-text>ν<sub>μ</sub></math-text></inline-eqn>'s with a 5% <inline-eqn></inline-eqn> component of 18 GeV average energy.</p><p>The series of steps in the location process of a CC event starts with track reconstruction in the electronic detectors, including muon identification, and terminates with association to the primary and possibly secondary vertices of the tracks recorded in a volume of emulsion. The event location process is summarized in [<cite linkend="nj399459bib20">20</cite>] and detailed in [<cite linkend="nj399459bib22">22</cite>] and [<cite linkend="nj399459bib23">23</cite>]. The so-called ‘NetScan’ method used to analyse the emulsion volume around the interaction point is described in [<cite linkend="nj399459bib22">22</cite>] and [<cite linkend="nj399459bib24">24</cite>].</p><p>About 150 000 events have been located in the emulsion target and have been analysed following this procedure.</p><p>An event is recognized as a CC neutrino interaction if the primary muon track, defined by the electronic detectors, is found in more than one emulsion plate. Decay topologies are selected using the following criteria. At least one of the tracks connected to a secondary vertex is detected in more than one plate, and the direction measured in the emulsion matches that of a track reconstructed in the fibre tracker system. The parent angle is within <inline-eqn><math-text>400 <upright>mrad</upright></math-text></inline-eqn> from the beam direction. In the case of neutral particle decay, the parent angle is deduced from the line connecting the primary and secondary vertex. The impact parameter to the primary vertex of at least one of the daughter tracks is larger than a value that is determined on the basis of the resolution<fnref linkend="nj399459fn1"><sup>1</sup></fnref>. To remove random association, the impact parameter is also required to be smaller than a value depending on the distance over which the track is extrapolated to the vertex, typically of the order of <inline-eqn><math-text>130 μ<upright>m</upright></math-text></inline-eqn>. The flight length of the parent candidate is required to be larger than <inline-eqn><math-text>25 μ<upright>m</upright></math-text></inline-eqn>.</p><p>Out of a sample of 143 742 located neutrino-induced CC interaction vertices, 93 807 were fully scanned and analysed. The selection criteria retain 2752 events as having a decay topology. These have all been visually inspected. The presence of a decay was confirmed for 2013 events. A secondary vertex is accepted as a decay if the number of charged particles is consistent with charge conservation and no other activity (Auger electron or visible recoil) is observed. The purity of the automatic selection is 73.2%.</p><p>The result of the visual inspection is given in table <tabref linkend="nj399459tab1">1</tabref>, where according to prong multiplicity the observable decay topologies are classified as even-prong decays V2, V4 or V6 for neutral particles (mainly <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn>) and odd-prong decays C1, C3 or C5 for charged particles (mainly <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn>, <inline-eqn><math-text><upright>D</upright><sup>+</sup></math-text></inline-eqn>, <inline-eqn><math-text><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></math-text></inline-eqn>). The rejected sample consists of secondary hadronic interactions, <inline-eqn><math-text>δ</math-text></inline-eqn>-rays or gamma conversions, overlaid neutrino interactions and low-momentum tracks, which because of multiple scattering appear as tracks with a large impact parameter. The remainder consists either of fake vertices, being reconstructed using one or more background tracks, or of vertices with a parent track not connected to the primary (passing-through tracks not identified as such because of inefficiencies).</p><table id="nj399459tab1" frame="topbot" position="float" width="fit" place="top"><caption type="table" id="nj399459tc1" label="Table 1"><p>Charged-current data sample and charm candidates.</p></caption><tgroup cols="2"><colspec colnum="1" colname="col1" align="left"></colspec><colspec colnum="2" colname="col2" align="right"></colspec><thead><row><entry>Located CC events</entry><entry>93 807</entry></row><row><entry>Selected for visual inspection</entry><entry>2752</entry></row></thead><tbody><row><entry>Decay topologies with flight length <inline-eqn><math-text><25 μ<upright>m</upright></math-text></inline-eqn></entry><entry>3</entry></row><row><entry>Topologies with kink angle <inline-eqn><math-text><50 <upright>mrad</upright></math-text></inline-eqn></entry><entry>11</entry></row><row><entry>Secondary interactions</entry><entry>278</entry></row><row><entry>Electron–positron pairs</entry><entry>95</entry></row><row><entry>Overlaid neutrino interactions</entry><entry>44</entry></row><row><entry>Uncorrelated (overlaid) secondary vertices</entry><entry>21</entry></row><row><entry>Passing-through tracks</entry><entry>128</entry></row><row><entry>All tracks from primary vertex</entry><entry>142</entry></row><row><entry><inline-eqn><math-text>δ</math-text></inline-eqn>-rays</entry><entry>2</entry></row><row><entry>Other</entry><entry>15</entry></row><row><entry>Charged charm candidates</entry><entry>965</entry></row><row><entry>C1</entry><entry>452</entry></row><row><entry>C3</entry><entry>491</entry></row><row><entry>C5</entry><entry>22</entry></row><row><entry>Neutral charm candidates</entry><entry>1048</entry></row><row><entry>V2</entry><entry>819</entry></row><row><entry>V4</entry><entry>226</entry></row><row><entry>V6</entry><entry>3</entry></row><row><entry>Total charm candidates</entry><entry>2013</entry></row></tbody></tgroup></table><p>As shown in table <tabref linkend="nj399459tab1">1</tabref>, we find 965 charged charm candidates (452 with C1 topology, 491 with C3 and 22 with C5) and 1048 neutral charm candidates (819 with V2 topology, 226 with V4 and 3 with V6).</p></sec-level1><sec-level1 id="nj399459s4" label="4"><heading>Reconstruction efficiency and background evaluation</heading><p indent="no">The efficiency of event reconstruction in the electronic detector as well as those of event location and reconstruction in the emulsion need to be evaluated.</p><p>When the neutrino scatters off a nucleon, several physical mechanisms produce charmed hadrons. However, they are predominantly produced in deep-inelastic interactions. Different Monte Carlo generators are used [<cite linkend="nj399459bib25">25</cite>]. The neutrino beam spectrum is simulated using the GBEAM [<cite linkend="nj399459bib26">26</cite>] generator based on GEANT3<fnref linkend="nj399459fn2"><sup>2</sup></fnref>. It uses FLUKA98 [<cite linkend="nj399459bib27">27</cite>] to describe the interactions of protons with the beryllium target.</p><p>Deep-inelastic scattering interactions are simulated using the JETTA generator [<cite linkend="nj399459bib28">28</cite>], which is based on LEPTO 6.1 [<cite linkend="nj399459bib29">29</cite>] and JETSET [<cite linkend="nj399459bib30">30</cite>]. This generator is used to simulate charm production as well as inclusive CC interactions. Quasi-elastic interactions and resonance production processes are simulated with the RESQUE generator [<cite linkend="nj399459bib31">31</cite>]. In addition, some other charm-production mechanisms are simulated: quasi-elastic charmed baryon production by QEGEN [<cite linkend="nj399459bib32">32</cite>] and diffractive production of charmed mesons by the ASTRA generator [<cite linkend="nj399459bib33">33</cite>].</p><p>The simulation of detector response as well as the performance of pattern recognition in electronic tracking detectors is performed for each process by a GEANT3 based simulation program (see [<cite linkend="nj399459bib36">36</cite>]). The simulated response of electronic detectors is processed through the same analysis chain as the raw data obtained with the detector. The event location technique in emulsion is parameterized by a function of the primary muon momentum and angle, taking into account that the muon momentum distribution is different for the two samples of CC events containing charm or not.</p><p>To evaluate the efficiency to reconstruct decay topologies of the charmed hadrons, realistic conditions of track densities in the emulsion have to be reproduced. These are obtained by merging the emulsion data of simulated events with real NetScan data, which do not have a reconstructed vertex but contain tracks that stop or pass through the NetScan fiducial volume. These so-called ‘empty volumes’ represent a realistic background. The combined data are passed through the same NetScan reconstruction and selection programs as used for real data. Details of the response of the automatic microscopes are used in this calculation. Important parameters are angular resolution and efficiency as a function of incident angle of the track.</p><p>To evaluate the detection efficiency for charmed hadrons, the branching ratios and the corresponding uncertainties are taken into account. The contribution from QE and DIS interactions to the production of charmed baryons is evaluated as discussed in [<cite linkend="nj399459bib34">34</cite>]. The contribution of diffractive charm production is evaluated by using the method described in [<cite linkend="nj399459bib35">35</cite>]. The <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> detection efficiency is given in [<cite linkend="nj399459bib20">20</cite>]. Only ratios of electronic reconstruction and vertex location efficiencies need to be determined, thus reducing significantly the systematic error. The overall selection efficiencies relative to the selection of CC events for different decay topologies are shown in table <tabref linkend="nj399459tab2">2</tabref>. The requirement that at least one track of the secondary vertex be matched with a track in the electronic detectors causes the efficiency to be higher with increasing numbers of prongs at the decay vertex.</p><table id="nj399459tab2" frame="topbot" position="float" width="fit" place="top"><caption type="table" id="nj399459tc2" label="Table 2"><p>Overall selection efficiency relative to CC containing geometrical acceptance and reconstruction efficiency for charged charmed hadrons decaying into one, three and five prongs, respectively.</p></caption><tgroup cols="4"><colspec colnum="1" colname="col1" align="left"></colspec><colspec colnum="2" colname="col2" align="center"></colspec><colspec colnum="3" colname="col3" align="center"></colspec><colspec colnum="4" colname="col4" align="center"></colspec><thead><row><entry></entry><entry><inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn></entry><entry><inline-eqn><math-text><upright>D</upright><sup>+</sup></math-text></inline-eqn></entry><entry><inline-eqn><math-text><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></math-text></inline-eqn></entry></row></thead><tbody><row><entry><inline-eqn><math-text><italic>C</italic><sup>+</sup>→<upright>1p</upright></math-text></inline-eqn> (%)</entry><entry><inline-eqn><math-text>17.1±1.3</math-text></inline-eqn></entry><entry><inline-eqn><math-text>21.7±0.9</math-text></inline-eqn></entry><entry><inline-eqn><math-text>23.9±1.2</math-text></inline-eqn></entry></row><row><entry><inline-eqn><math-text><italic>C</italic><sup>+</sup>→<upright>3p</upright></math-text></inline-eqn> (%)</entry><entry><inline-eqn><math-text>40.8±1.6</math-text></inline-eqn></entry><entry><inline-eqn><math-text>49.0±1.2</math-text></inline-eqn></entry><entry><inline-eqn><math-text>57.7±1.4</math-text></inline-eqn></entry></row><row><entry><inline-eqn><math-text><italic>C</italic><sup>+</sup>→<upright>5p</upright></math-text></inline-eqn> (%)</entry><entry><inline-eqn><math-text>44.2±5.2</math-text></inline-eqn></entry><entry><inline-eqn><math-text>52.7±6.5</math-text></inline-eqn></entry><entry><inline-eqn><math-text>57.3±3.4</math-text></inline-eqn></entry></row><row><entry><inline-eqn><math-text>ε<sub><upright>3p</upright></sub>/ε<sub><upright>1p</upright></sub></math-text></inline-eqn></entry><entry><inline-eqn><math-text>2.3±0.2</math-text></inline-eqn></entry><entry><inline-eqn><math-text>2.3±0.1</math-text></inline-eqn></entry><entry><inline-eqn><math-text>2.4±0.1</math-text></inline-eqn></entry></row></tbody></tgroup></table><p>Figure <figref linkend="nj399459fig1">1</figref> shows the detection efficiency of charged charmed hadrons <inline-eqn><math-text><upright>D</upright><sup>+</sup></math-text></inline-eqn>, <inline-eqn><math-text><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></math-text></inline-eqn> and <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn> relative to CC interactions as a function of neutrino energy. Two factors make the selection less efficient at small visible energies: the decay angle of the charm daughters is larger; the flight length of the charm parent is shorter and thus a secondary track might be wrongly attached to the primary vertex. At high energies, a large fraction of charmed hadron decays near the edge or beyond the fiducial volume.</p><figure id="nj399459fig1" parts="single" width="column" position="float" pageposition="top" printstyle="normal" orientation="port"><graphic position="indented"><graphic-file version="print" format="EPS" width="31.7pc" printcolour="no" filename="images/nj399459fig1.eps"></graphic-file><graphic-file version="ej" format="JPEG" printcolour="no" filename="images/nj399459fig1.jpg"></graphic-file></graphic><caption type="figure" id="nj399459fc1" label="Figure 1"><p indent="no">Detection efficiency of charged charm hadrons relative to CC interactions as a function of neutrino energy for one-prong decay (left panel) and three-prong decays (right panel). The data points indicated with circles show the efficiency for <inline-eqn><math-text><upright>D</upright><sup>+</sup></math-text></inline-eqn> detection, the points marked with triangles are for <inline-eqn><math-text><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></math-text></inline-eqn> detection and squares for <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn>.</p></caption></figure><p>The spread in the performance of the microscopes is found to induce a difference of <inline-eqn><math-text>±2%</math-text></inline-eqn> in the calculation of the selection efficiencies for charm detection. The weighted average performance of the individual microscope stages is taken for the calculation in order to minimize the uncertainty. The uncertainty on the efficiency combination of several charm production mechanisms introduces an additional error on the efficiency of <inline-eqn><math-text>±12%</math-text></inline-eqn> for <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn> and <inline-eqn><math-text>±3%</math-text></inline-eqn> for <inline-eqn><math-text><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></math-text></inline-eqn>. Including also other factors, such as the uncertainty in the fragmentation, we estimate a total systematic uncertainty in the efficiency of 14% for <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn>, 5% for <inline-eqn><math-text><upright>D</upright><sup>+</sup></math-text></inline-eqn> and 6% for <inline-eqn><math-text><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></math-text></inline-eqn> relative to CC event detection.</p><p>There is a small fraction of non-charm events in the manually confirmed sample. This contamination is mainly due to hadronic interactions with no heavily ionizing tracks or other evidence for nuclear break-up (blobs or Auger electrons) that fake charm decays (white kinks) and decays of <inline-eqn><math-text>Σ<sup>±</sup></math-text></inline-eqn>, <inline-eqn><math-text><upright>K</upright><sub><upright>s</upright></sub><sup>0</sup></math-text></inline-eqn> and <inline-eqn><math-text>Λ<sup>0</sup></math-text></inline-eqn>. The backgrounds from the decays of strange particles were estimated using the JETTA [<cite linkend="nj399459bib28">28</cite>] MC generator.</p><p>In the <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> sample, the strange-particle decay background was evaluated as <inline-eqn><math-text>11.5±1.9</math-text></inline-eqn><inline-eqn><math-text>Λ<sup>0</sup></math-text></inline-eqn>'s and <inline-eqn><math-text>25.1±2.9</math-text></inline-eqn><inline-eqn><math-text><upright>K</upright><sub><upright>s</upright></sub><sup>0</sup></math-text></inline-eqn>'s in the V2 sample and negligible for the other <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> decay topologies [<cite linkend="nj399459bib20">20</cite>]. For charged charmed hadrons, the expected background in the C1 sample from the decay of charged strange particles is <inline-eqn><math-text>8.5±1.3</math-text></inline-eqn> events.</p><p>The background due to white kink interactions is obtained by generating such kinds of interactions, assuming a hadron interaction length of <inline-eqn><math-text>λ=24 <upright>m</upright></math-text></inline-eqn> [<cite linkend="nj399459bib36">36</cite>], and processing them through the full simulation chain. The contamination of white kink interactions is evaluated as <inline-eqn><math-text>34.6±2.0</math-text></inline-eqn> in the C1 sample and <inline-eqn><math-text>3.8±0.4</math-text></inline-eqn> and <inline-eqn><math-text>1.5±0.2</math-text></inline-eqn> in the C3 and C5 samples, respectively.</p></sec-level1><sec-level1 id="nj399459s5" label="5"><heading>Charmed particle production fractions</heading><p indent="no">Since it is not possible to identify the type of charged charmed particles on an event-by-event basis, they are separated using a statistical approach by exploiting the different lifetimes of <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn>, <inline-eqn><math-text><upright>D</upright><sup>+</sup></math-text></inline-eqn> and <inline-eqn><math-text><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></math-text></inline-eqn>, and hence by measuring the flight length and the momentum of the charmed hadrons. The flight length is very precisely measured in the emulsion target. The flight length distributions for the one-prong and three-prong events are shown in figure <figref linkend="nj399459fig2">2</figref>. The momentum is not directly measured, but it can be estimated by exploiting the correlation between the momentum and the decay angle of the products [<cite linkend="nj399459bib37">37</cite>]. For a given decay mode, this correlation is determined by the decay kinematics. Figure <figref linkend="nj399459fig3">3</figref> shows the correlation between charm momentum and the daughter's inverse opening angle. The charm parent momentum is obtained from the opening angle of the decay products using a parameterization evaluated with simulated events. The resolution obtained with this method is about 25% for three-prong events and 35% for one-prong events.</p><figure id="nj399459fig2" parts="single" width="column" position="float" pageposition="top" printstyle="normal" orientation="port"><graphic position="indented"><graphic-file version="print" format="EPS" width="31.7pc" printcolour="no" filename="images/nj399459fig2.eps"></graphic-file><graphic-file version="ej" format="JPEG" printcolour="no" filename="images/nj399459fig2.jpg"></graphic-file></graphic><caption type="figure" id="nj399459fc2" label="Figure 2"><p indent="no">Flight length distributions for the one-prong (left) and three-prong (right) charged charm events. The distributions are truncated due to the limited NetScan volume.</p></caption></figure><figure id="nj399459fig3" parts="single" width="column" position="float" pageposition="top" printstyle="normal" orientation="port"><graphic position="indented"><graphic-file version="print" format="EPS" width="31.7pc" printcolour="no" filename="images/nj399459fig3.eps"></graphic-file><graphic-file version="ej" format="JPEG" printcolour="yes" filename="images/nj399459fig3.jpg"></graphic-file></graphic><caption type="figure" id="nj399459fc3" label="Figure 3"><p indent="no">Left: correlation between charm momentum and inverse daughter's opening angle. Right: charm momentum resolution obtained by the Monte Carlo parameterization. Circles indicate one-prong events, and squares three-prong events. The simulated charm momentum spectrum is superimposed in arbitrary units.</p></caption></figure><p>To achieve statistical separation of the different charged charm species, a likelihood function is constructed for each event using the decay lifetime information. Following [<cite linkend="nj399459bib38">38</cite>], the form of the probability function for each event <inline-eqn><math-text>(<italic>n</italic>)</math-text></inline-eqn> is expressed as the sum of probabilities for the three final state particle hypotheses <inline-eqn><math-text><italic>i</italic></math-text></inline-eqn> (<inline-eqn><math-text><italic>i</italic>=Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn>, <inline-eqn><math-text><upright>D</upright><sup>+</sup></math-text></inline-eqn>, <inline-eqn><math-text><upright>D</upright><sub><upright>s</upright></sub><sup>+</sup></math-text></inline-eqn>). Using the numbers of hadrons of each species, <inline-eqn><math-text><italic>N</italic><sub><italic>i</italic></sub></math-text></inline-eqn>, as the free parameters of the fit, the probability takes the form<display-eqn textype="equation" notation="LaTeX" number="no"></display-eqn>where <inline-eqn><math-text><italic>l</italic>(<italic>n</italic>)</math-text></inline-eqn> is the measured decay length and <inline-eqn><math-text><italic>p</italic><sub><italic>i</italic></sub>(<italic>n</italic>)</math-text></inline-eqn> is the estimated momentum for hypothesis <inline-eqn><math-text><italic>i</italic></math-text></inline-eqn>. The efficiencies <inline-eqn><math-text>ε<sub><italic>i</italic></sub>(<italic>l</italic>)</math-text></inline-eqn> are a function of the decay length for each different hadron species <inline-eqn><math-text><italic>i</italic></math-text></inline-eqn>. The mean lifetimes <inline-eqn><math-text>τ<sub><italic>i</italic></sub></math-text></inline-eqn> and the masses of the charmed hadrons <inline-eqn><math-text><italic>M</italic><sub><italic>i</italic></sub></math-text></inline-eqn> are taken from [<cite linkend="nj399459bib39">39</cite>]. The weights<display-eqn textype="equation" notation="LaTeX" number="no"></display-eqn>account for the lifetime spectrum deformation due to selection efficiencies. We have introduced <inline-eqn><math-text><italic>u</italic></math-text></inline-eqn>, an arbitrary unit length.</p><p>From the probability functions for each event, an extended log-likelihood function is constructed:<display-eqn textype="equation" notation="LaTeX" number="no"></display-eqn>The second and third terms above are the log of the Poisson probability function to observe <inline-eqn><math-text><italic>N</italic><sub><upright>obs</upright></sub></math-text></inline-eqn> events given the produced events. The Poisson term incorporates the finite statistics of the experiment. The negative log-likelihood function is then minimized. To be independent of charm topological branching ratios, the one-prong and three-prong samples are fitted separately.</p><p>For the one-prong sample, out of 93 807 CC events, the result of the fit is<display-eqn textype="equation" notation="LaTeX" number="no"></display-eqn>and for the three-prong sample<display-eqn textype="equation" notation="LaTeX" number="no"></display-eqn>where the first error is the statistical error given by the fit and the second is due to the systematic effect on the efficiencies discussed in the previous section. Given the small statistics, the five-prong sample is included as a correction. This approximation has a negligible effect on the final result owing to the small value of this branching ratio. The relative contributions of charged charm species are<display-eqn textype="equation" notation="LaTeX" number="no"></display-eqn>The correlation coefficients are relatively large and similar for the one-prong and three-prong fits. We find <inline-eqn><math-text>ρ(<upright>Λ<sub><upright>c</upright></sub><sup>+</sup></upright>, <upright>D</upright><sup>+</sup>)≈0.3</math-text></inline-eqn>, <inline-eqn><math-text>ρ(<upright>Λ<sub><upright>c</upright></sub><sup>+</sup></upright>, <upright>D</upright><sub><upright>s</upright></sub><sup>+</sup>)≈−0.65</math-text></inline-eqn> and <inline-eqn><math-text>ρ(<upright>D</upright><sup>+</sup>, <upright>D</upright><sub><upright>s</upright></sub><sup>+</sup>)≈−0.75</math-text></inline-eqn>.</p></sec-level1><sec-level1 id="nj399459s6" label="6"><heading>Topological branching ratios</heading><p indent="no">From the results given in the previous section, it is possible to estimate the inclusive topological decay modes for the different charged charm species. In spite of the relatively large errors, this information is useful given the fact that, for each charged charm species, the existing measurements cover only half of all decay modes. We find
<display-eqn id="nj399459eqn1" textype="equation" notation="LaTeX" eqnnum="1" lines="multiline"></display-eqn>The value of the <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn> three-prong branching fraction is 1.5 standard deviations from the one quoted in a previous CHORUS publication [<cite linkend="nj399459bib40">40</cite>]. In the present analysis no assumption is made on the other charmed hadron topological branching ratios, whereas in [<cite linkend="nj399459bib40">40</cite>] a specific assumption was made. It should also be noted that the decay-recognition efficiencies are significantly different in the analysis of [<cite linkend="nj399459bib40">40</cite>] compared to the present analysis. Owing to advances in the automatic pattern recognition, it is possible to define larger tolerances on the distance of closest approach of the decay daughter with respect to the primary muon. In addition, in [<cite linkend="nj399459bib40">40</cite>] an equal fraction of QE to DIS <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn> production was assumed, while in this paper the value of <inline-eqn><math-text>0.15±0.09</math-text></inline-eqn> obtained in [<cite linkend="nj399459bib34">34</cite>] was used. The samples in the two analyses are largely independent due to the smaller initial sample available in [<cite linkend="nj399459bib40">40</cite>] and the different cuts applied.</p><p>The number of charmed hadrons decaying into five charged particles is 22 with a background of 1.5 events. This is too small to fit the different contributions. Assuming that the five-prong decays are equally distributed among the three charged charm species and correcting for the efficiency, we have <inline-eqn><math-text><italic>N</italic><sub><italic>C</italic>5</sub>=42.6±9.1</math-text></inline-eqn>. The overall charged charm topological branching fractions are
<display-eqn id="nj399459eqn2" textype="equation" notation="LaTeX" eqnnum="2" lines="multiline"></display-eqn></p></sec-level1><sec-level1 id="nj399459s7" label="7"><heading><inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> production cross-section</heading><p indent="no">The cross-section for the production of neutral charmed meson <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> in neutrino CC interactions has been measured using the same sample of charm candidates [<cite linkend="nj399459bib20">20</cite>]. The analysis was based on the sample of <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> decaying into four charged particles and on the well-measured branching ratio <inline-eqn><math-text><italic>BR</italic>(<upright>D</upright><sup>0</sup>→4 <upright>prongs</upright>)</math-text></inline-eqn>. By using the same method with the updated value quoted in [<cite linkend="nj399459bib39">39</cite>], <inline-eqn><math-text><italic>BR</italic>(<upright>D</upright><sup>0</sup>→4 <upright>prongs</upright>)=0.143±0.005</math-text></inline-eqn>, we obtain the value of the cross-section:
<display-eqn id="nj399459eqn3" textype="equation" notation="LaTeX" eqnnum="3"></display-eqn>It is important to observe that in [<cite linkend="nj399459bib20">20</cite>] also the decay of <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> into a fully neutral final state was indirectly measured by subtracting the branching fractions for two, four and six prongs from unity. The updated value is
<display-eqn id="nj399459eqn4" textype="equation" notation="LaTeX" eqnnum="4"></display-eqn>The latter measurements together with the topological branching ratios quoted above have an effect on the determination of the muonic branching ratio of charmed hadrons, as reported in [<cite linkend="nj399459bib41">41</cite>]. The updated value is
<display-eqn id="nj399459eqn5" textype="equation" notation="LaTeX" eqnnum="5"></display-eqn>This is in good agreement with the value of <inline-eqn><math-text><italic>B</italic><sub>μ</sub>=(9.6±0.4(<upright>stat</upright>)±0.8(<upright>syst</upright>))%</math-text></inline-eqn> obtained in the CHORUS dimuon event analysis [<cite linkend="nj399459bib11">11</cite>].</p></sec-level1><sec-level1 id="nj399459s8" label="8"><heading>Charm cross-sections</heading><p indent="no">By using the fitted quantities of the one-prong and three-prong samples and the corrected number of five-prong events, a relative cross-section
<display-eqn id="nj399459eqn6" textype="equation" notation="LaTeX" eqnnum="6"></display-eqn>is obtained for the charged charm production rate in CC interactions. Forcing the <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn> one-prong to three-prong ratio to be that of [<cite linkend="nj399459bib40">40</cite>] hardly affects the total charm cross-section (by about one-quarter of the systematic error).</p><p>Including the result obtained for the neutral charmed meson <inline-eqn><math-text><upright>D</upright><sup>0</sup></math-text></inline-eqn> given in the previous section, the relative inclusive charm production rate in CC interactions is
<display-eqn id="nj399459eqn7" textype="equation" notation="LaTeX" eqnnum="7"></display-eqn>with a relative contribution of the charm species:<display-eqn textype="equation" notation="LaTeX" number="no"></display-eqn></p><p>In [<cite linkend="nj399459bib42">42</cite>] we reported that in anti-neutrino CC interactions <inline-eqn></inline-eqn>. The value is similar to what we find for neutrino interactions, as expected, since both total CC cross-section and charm production are about half in this case.</p><p>The energy dependence of the relative charm production cross-section is obtained by estimating the energy of the interacting neutrino on an event-by-event basis. A good estimate is the sum of the energy of the primary muon and the total energy deposition in the calorimeter corrected for the energy deposited by the muon and for the unmeasured energy loss of hadrons in the material upstream of the calorimeter. The unmeasured part is mainly due to the absorption in the emulsion stacks and corrected to the measured vertex position. The resolution of the calorimeter energy measurement is <inline-eqn></inline-eqn> [<cite linkend="nj399459bib16">16</cite>]. The momentum resolution varies from <inline-eqn><math-text>∼15%</math-text></inline-eqn> [<cite linkend="nj399459bib16">16</cite>] in the 12–<inline-eqn><math-text>28 <upright>GeV</upright>/<italic>c</italic></math-text></inline-eqn> interval to <inline-eqn><math-text>∼19%</math-text></inline-eqn> [<cite linkend="nj399459bib16">16</cite>] at about <inline-eqn><math-text>70 <upright>GeV</upright>/<italic>c</italic></math-text></inline-eqn>, as measured with test-beam muons. Given the relatively small size of the energy bins, the average neutrino energy is very similar for charm production events and CC events within the same bin, and no correction is necessary. The efficiency is calculated by weighting the energy-dependent and decay topology-dependent efficiencies with the measured branching ratios as reported above.</p><p>The energy dependence of backgrounds is assumed to be the same as that of CC neutrino events. The differential cross-section measurement is normalized to the total neutrino–nucleon cross-section and thus is not affected by the uncertainties between the beam simulation and the beam flux measurement. The measurement of the charm production rate relative to the CC interaction rate is shown as a function of neutrino energy and compared with the measurement from E531 [<cite linkend="nj399459bib15">15</cite>] in figure <figref linkend="nj399459fig4">4</figref>. Good agreement with an improved precision with respect to E531 measurement is shown. Very good agreement is found with respect to the dimuon cross-section measured with the CHORUS electronic detector by scaling the dimuon results for the muonic charm decay fraction quoted in this paper.</p><figure id="nj399459fig4" parts="single" width="column" position="float" pageposition="top" printstyle="normal" orientation="port"><graphic position="indented"><graphic-file version="print" format="EPS" width="18.7pc" printcolour="no" filename="images/nj399459fig4.eps"></graphic-file><graphic-file version="ej" format="JPEG" printcolour="yes" filename="images/nj399459fig4.jpg"></graphic-file></graphic><caption type="figure" id="nj399459fc4" label="Figure 4"><p indent="no">Energy dependence of the relative inclusive charm production cross-section ratio. The squares show the measurements reported here, and the points marked with triangles the E531 result. The circles represent the dimuon cross-section measured in [<cite linkend="nj399459bib11">11</cite>] scaled for the muonic branching ratio quoted in this paper.</p></caption></figure><p>The energy dependence for charged and neutral charm is reported separately in figure <figref linkend="nj399459fig5">5</figref>. A very similar energy behaviour is shown except for the low-energy region where the contribution of quasi-elastic production of <inline-eqn><math-text>Λ<sub><upright>c</upright></sub><sup>+</sup></math-text></inline-eqn> may account for the difference [<cite linkend="nj399459bib34">34</cite>].</p><figure id="nj399459fig5" parts="single" width="column" position="float" pageposition="top" printstyle="normal" orientation="port"><graphic position="indented"><graphic-file version="print" format="EPS" width="19.1pc" printcolour="no" filename="images/nj399459fig5.eps"></graphic-file><graphic-file version="ej" format="JPEG" printcolour="yes" filename="images/nj399459fig5.jpg"></graphic-file></graphic><caption type="figure" id="nj399459fc5" label="Figure 5"><p indent="no">Energy dependence for charged (squares) and neutral (triangles) charm cross-section ratio relative to CC cross-section.</p></caption></figure></sec-level1><acknowledgment><heading>Acknowledgments</heading><p indent="no">We gratefully acknowledge the help and support of the neutrino-beam staff and the numerous technical collaborators who contributed to detector construction, operation, emulsion pouring, development and scanning. The experiment was made possible by grants from the Institut Interuniversitaire des Sciences Nucléaires and the Interuniversitair Instituut voor Kernwetenschappen (Belgium); the Israel Science Foundation (grant no. 328/94) and the Technion Vice President Fund for the Promotion of Research (Israel); CERN (Geneva, Switzerland); the German Bundesministerium f<inline-eqn></inline-eqn>r Bildung und Forschung (Germany); the Institute of Theoretical and Experimental Physics (Moscow, Russia); the Istituto Nazionale di Fisica Nucleare (Italy); the Promotion and Mutual Aid Corporation for Private Schools of Japan and Japan Society for the Promotion of Science (Japan); Korea Research Foundation Grant (KRF-2003-005-C00014) (Republic of Korea); the Foundation for Fundamental Research on Matter FOM and the National Scientific Research Organization NWO (The Netherlands); and the Scientific, and Technical Research Council of Turkey (Turkey). We gratefully acknowledge their support. 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interactions</title></titleInfo><titleInfo type="alternative" lang="eng"><title>Measurement of charm production in neutrino charged-current interactions</title></titleInfo><name type="personal"><namePart type="given">A</namePart><namePart type="family">Kayis-Topaksu</namePart><affiliation>ukurova University, Adana, Turkey</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G</namePart><namePart type="family">nengt</namePart><affiliation>ukurova University, Adana, Turkey</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R</namePart><namePart type="family">van Dantzig</namePart><affiliation>NIKHEF, Amsterdam, The Netherlands</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M</namePart><namePart type="family">de Jong</namePart><affiliation>NIKHEF, Amsterdam, The Netherlands</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R G C</namePart><namePart type="family">Oldeman</namePart><affiliation>NIKHEF, Amsterdam, The Netherlands</affiliation><affiliation>Now at Universitdi Cagliari and INFN, Cagliari, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M</namePart><namePart type="family">Gler</namePart><affiliation>METU, Ankara, Turkey</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">U</namePart><namePart type="family">Kse</namePart><affiliation>METU, Ankara, Turkey</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P</namePart><namePart type="family">Tolun</namePart><affiliation>METU, Ankara, Turkey</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M G</namePart><namePart type="family">Catanesi</namePart><affiliation>Universitdi Bari and INFN, Bari, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M T</namePart><namePart type="family">Muciaccia</namePart><affiliation>Universitdi Bari and INFN, Bari, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K</namePart><namePart type="family">Winter</namePart><affiliation>Humboldt Universitt, Berlin, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B</namePart><namePart type="family">Van de Vyver</namePart><affiliation>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</affiliation><affiliation>Fonds voor Wetenschappelijk Onderzoek, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P</namePart><namePart type="family">Vilain</namePart><affiliation>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</affiliation><affiliation>Fonds National de la Recherche Scientifique, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G</namePart><namePart type="family">Wilquet</namePart><affiliation>Inter-University Institute for High Energies (ULB-VUB) Brussels, Belgium</affiliation><affiliation>Now at DESY, Hamburg</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">B</namePart><namePart type="family">Saitta</namePart><affiliation>Universitdi Cagliari and INFN, Cagliari, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E</namePart><namePart type="family">Di Capua</namePart><affiliation>Universitdi Ferrara and INFN, Ferrara, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S</namePart><namePart type="family">Ogawa</namePart><affiliation>Toho University, Funabashi, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H</namePart><namePart type="family">Shibuya</namePart><affiliation>Toho University, Funabashi, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">I R</namePart><namePart type="family">Hristova</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>Now at DESY, Hamburg</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T</namePart><namePart type="family">Kawamura</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D</namePart><namePart type="family">Kolev</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>On leave of absence and at St. Kliment Ohridski University of Sofia, Bulgaria</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H</namePart><namePart type="family">Meinhard</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">Panman</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">Rozanov</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>Now at CPPM CNRS-IN2P3, Marseille, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R</namePart><namePart type="family">Tsenov</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>Now at CPPM CNRS-IN2P3, Marseille, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J W E</namePart><namePart type="family">Uiterwijk</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P</namePart><namePart type="family">Zucchelli</namePart><affiliation>CERN, Geneva, Switzerland</affiliation><affiliation>On leave of absence from INFN, Ferrara, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J</namePart><namePart type="family">Goldberg</namePart><affiliation>Technion, Haifa, Israel</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M</namePart><namePart type="family">Chikawa</namePart><affiliation>Kinki University, Higashioaka, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J S</namePart><namePart type="family">Song</namePart><affiliation>Gyeongsang National University, Jinju, Korea</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C S</namePart><namePart type="family">Yoon</namePart><affiliation>Gyeongsang National University, Jinju, Korea</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K</namePart><namePart type="family">Kodama</namePart><affiliation>Aichi University of Education, Kariya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N</namePart><namePart type="family">Ushida</namePart><affiliation>Aichi University of Education, Kariya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S</namePart><namePart type="family">Aoki</namePart><affiliation>Kobe University, Kobe, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T</namePart><namePart type="family">Hara</namePart><affiliation>Kobe University, Kobe, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T</namePart><namePart type="family">Delbar</namePart><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D</namePart><namePart type="family">Favart</namePart><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G</namePart><namePart type="family">Grgoire</namePart><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S</namePart><namePart type="family">Kalinin</namePart><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">I</namePart><namePart type="family">Makhlioueva</namePart><affiliation>Universit Catholique de Louvain, Louvain-la-Neuve, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A</namePart><namePart type="family">Artamonov</namePart><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P</namePart><namePart type="family">Gorbunov</namePart><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V</namePart><namePart type="family">Khovansky</namePart><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V</namePart><namePart type="family">Shamanov</namePart><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">I</namePart><namePart type="family">Tsukerman</namePart><affiliation>Institute for Theoretical and Experimental Physics, Moscow, Russian Federation</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N</namePart><namePart type="family">Bruski</namePart><affiliation>Westflische Wilhelms-Universitt, Mnster, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D</namePart><namePart type="family">Frekers</namePart><affiliation>Westflische Wilhelms-Universitt, Mnster, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K</namePart><namePart type="family">Hoshino</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J</namePart><namePart type="family">Kawada</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><affiliation>Now at University of Bern, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M</namePart><namePart type="family">Komatsu</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M</namePart><namePart type="family">Miyanishi</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M</namePart><namePart type="family">Nakamura</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T</namePart><namePart type="family">Nakano</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K</namePart><namePart type="family">Narita</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K</namePart><namePart type="family">Niu</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K</namePart><namePart type="family">Niwa</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N</namePart><namePart type="family">Nonaka</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">O</namePart><namePart type="family">Sato</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T</namePart><namePart type="family">Toshito</namePart><affiliation>Nagoya University, Nagoya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S</namePart><namePart type="family">Buontempo</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A G</namePart><namePart type="family">Cocco</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N</namePart><namePart type="family">D'Ambrosio</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G</namePart><namePart type="family">De Lellis</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G</namePart><namePart type="family">De Rosa</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F</namePart><namePart type="family">Di Capua</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><affiliation>Author to whom any correspondence should be addressed</affiliation><affiliation>E-mail: dicapua@na.infn.it</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G</namePart><namePart type="family">Fiorillo</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A</namePart><namePart type="family">Marotta</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M</namePart><namePart type="family">Messina</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P</namePart><namePart type="family">Migliozzi</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L</namePart><namePart type="family">Scotto Lavina</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P</namePart><namePart type="family">Strolin</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V</namePart><namePart type="family">Tioukov</namePart><affiliation>UniversitFederico II and INFN, Naples, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T</namePart><namePart type="family">Okusawa</namePart><affiliation>Osaka City University, Osaka, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">U</namePart><namePart type="family">Dore</namePart><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P F</namePart><namePart type="family">Loverre</namePart><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L</namePart><namePart type="family">Ludovici</namePart><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G</namePart><namePart type="family">Rosa</namePart><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R</namePart><namePart type="family">Santacesaria</namePart><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A</namePart><namePart type="family">Satta</namePart><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F R</namePart><namePart type="family">Spada</namePart><affiliation>UniversitLa Sapienza and INFN, Rome, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E</namePart><namePart type="family">Barbuto</namePart><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C</namePart><namePart type="family">Bozza</namePart><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G</namePart><namePart type="family">Grella</namePart><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G</namePart><namePart type="family">Romano</namePart><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C</namePart><namePart type="family">Sirignano</namePart><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S</namePart><namePart type="family">Sorrentino</namePart><affiliation>Universitdi Salerno and INFN, Salerno, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Y</namePart><namePart type="family">Sato</namePart><affiliation>Utsunomiya University, Utsunomiya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">I</namePart><namePart type="family">Tezuka</namePart><affiliation>Utsunomiya University, Utsunomiya, Japan</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="paper">paper</genre><originInfo><publisher>IOP Publishing</publisher><dateIssued encoding="w3cdtf">2011</dateIssued><copyrightDate encoding="w3cdtf">2011</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract>The nuclear emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27GeV average neutrino energy from 1994 to 1997. In total, about 100000 charged-current (CC) neutrino interactions with at least one identified muon were located in the emulsion target and fully reconstructed, using newly developed automated scanning systems. Charmed particles were searched for by a program recognizing particle decays. The observation of the decay in nuclear emulsion makes it possible to select a sample with very low background and minimal kinematical bias. In all, 2013 CC interactions with a charmed hadron candidate in the final state were selected and confirmed through visual inspection. The charm production rate induced by neutrinos relative to the CC cross-section is measured to be (NCX)/(CC)(5.750.32(stat)0.30(syst)). The charm production cross-section as a function of neutrino energy is also obtained. The results are in good agreement with previous measurements. The charm-quark hadronization produces the following charmed hadrons with relative fractions (in ): fD043.74.5, fc19.24.2, fD25.34.2 and fDs11.84.7.</abstract><relatedItem type="host"><titleInfo><title>New Journal of Physics</title></titleInfo><titleInfo type="abbreviated"><title>New J. Phys.</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">1367-2630</identifier><identifier type="eISSN">1367-2630</identifier><identifier type="PublisherID">nj</identifier><identifier type="CODEN">NJOPFM</identifier><identifier type="URL">stacks.iop.org/NJP</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>13</number></detail><detail type="issue"><caption>no.</caption><number>9</number></detail><extent unit="pages"><start>1</start><end>15</end><total>15</total></extent></part></relatedItem><identifier type="istex">9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD</identifier><identifier type="DOI">10.1088/1367-2630/13/9/093002</identifier><identifier type="articleID">399459</identifier><identifier type="articleNumber">093002</identifier><accessCondition type="use and reproduction" contentType="copyright">IOP Publishing and Deutsche Physikalische Gesellschaft</accessCondition><recordInfo><recordContentSource>IOP</recordContentSource><recordOrigin>IOP Publishing and Deutsche Physikalische Gesellschaft</recordOrigin></recordInfo></mods></metadata><enrichments><json:item><type>multicat</type><uri>https://api.istex.fr/document/9E2310DF83AD5B09AC81C66D7F3DFC2F08EA8DCD/enrichments/multicat</uri></json:item></enrichments><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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