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Your search keyword '"N., Ushida"' showing total 29 results
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29 results on '"N., Ushida"'

1. Nuclear capture at rest of Ξ− hyperons

Author

C.H. Hahn, A. Masuoka, Kenichi Imai, Y. Nagase, N. Yasuda, M. Ukai, Kimio Niwa, J. S. Song, C. S. Yoon, Yoshihiro Sato, H. Okabe, Saewoong Bahk, Yoshitaka Itow, I. G. Park, Takashi Z. Nakano, Kazuhiro Tanaka, T. Kuze, Ryuichi Takashima, Seok Kim, H. Funahashi, Yasuyuki Matsuda, A. Matsui, N. Ushida, S. H. Chung, C. O. Kim, Kazuma Nakazawa, J. Y. Kim, H. Tajima, K. Kodama, H. Togawa, C. Nagoshi, Y. Maeda, R. Ozaki, T. Tsunemi, K. Sakai, Hirotaka Takahashi, M. Nakamura, Akira Masaike, B. D. Park, K. Hoshino, H. Oda, T. Jin-ya, M. Hanabata, I. Tezuka, Fujio Takeutchi, T. Iijima, M. Sugimoto, S. Hirata, T. Sasaki, H. Shibuya, T. Hara, J. Yokota, Hajime Shimizu, Masaharu Ieiri, Shigeki Aoki, Takashi Watanabe, S. Ono, S. Nakanishi, M. Kazuno, and M. Teranaka

Subjects
Nuclear physics, Physics, Nuclear reaction, Nuclear and High Energy Physics, Particle decay, Meson, Branching fraction, Nuclear emulsion, Strangeness, Atomic physics, Sigma baryon, Xi baryon
Abstract

An emulsion-counter hybrid experiment (KEK E176) was carried out to search for double strangeness systems such as double- Λ hypernuclei and H -dibaryons. More than 10% of Ξ − hyperons produced in the (K − , K + ) reaction were brought to rest in the nuclear emulsion. We have obtained 98 candidate events of nuclear capture at rest of Ξ − hyperons which are described in this report. Among those, four events were identified as sequential weak decay of double- Λ hypernuclei. The binding energies of Ξ − -( 12 C, 14 N and 16 O) states have been estimated for two events which emit twin single- Λ hypernuclei back to back from the capture point. The Σ − p decay vertex of an H -dibaryon was searched for near the capture point and no evidence was observed. Upper limits for the branching ratio of H emission are 5–10% for a lifetime less than 0.1 ns at the 90% confidence level. The trapping probabilities of single and double strangeness to a nuclear fragment following Ξ − capture at rest have been studied.

Published
2009
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2. Measurements of D0 production and of decay branching fractions in neutrino–nucleon scattering

Author

Motoaki Miyanishi, Yoshihiro Sato, Nicola D'Ambrosio, V. Khovansky, M. T. Muciaccia, T. Kawamura, Alfredo G. Cocco, G. Rosa, A. Kayis-Topaksu, F. Di Capua, F. R. Spada, I. Tezuka, Ghislain Grégoire, Salvatore Buontempo, K. Hoshino, Toshiyuki Nakano, Th. Delbar, E. Barbuto, Denis Favart, G. De Lellis, P. Migliozzi, M. Messina, P. F. Loverre, G. Romano, Pierre Vilain, S. Sorrentino, L. Ludovici, E. Di Capua, L. Scotto Lavina, R. Santacesaria, M. Nakamura, P. Gorbunov, G. Fiorillo, Chiara Sirignano, A. Artamonov, M. de Jong, Gaston Wilquet, H. Shibuya, C. S. Yoon, P. Tolun, I. Makhlioueva, H. Meinhard, M. Sorrentino, Ilya Tsukerman, Murat Guler, R. van Dantzig, Alexandre Rozanov, S. Kalinin, Kimio Niwa, G. Grella, Masahiro Komatsu, Shigeki Aoki, Utku Kose, A. Satta, B. Van de Vyver, U. Dore, T. Toshito, N. Ushida, K. Winter, K. Narita, Piero Zucchelli, D. Frekers, K. Kodama, J. W. E. Uiterwijk, Rudolf Oldeman, J. Goldberg, Osamu Sato, Cristiano Bozza, N. Nonaka, V. Shamanov, D. Kolev, Biagio Saitta, Jiro Kawada, V. Tioukov, G. De Rosa, Gulsen Onengut, A. Marotta, Michiyuki Chikawa, K. Niu, T. Okusawa, P. Strolin, S. Ogawa, R. Tsenov, T. Hara, J. S. Song, N. Bruski, M. G. Catanesi, J. Panman, and Ivana Hristova

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Scattering, Branching fraction, Nuclear emulsion, Neutrino, Nucleon, Charged current, Charged particle
Abstract

During the years 1994–1997, the emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27 GeV average neutrino energy. In total about 100 000 charged-current neutrino interactions were located in the nuclear emulsion target and fully reconstructed. From this sample of events which was based on the data acquired by new automatic scanning systems, 1048 charged-current interactions with a D 0 in the final state were selected by a pattern recognition program and confirmed as neutral-particle decays through visual inspection. The ratio of decay branching fractions of the D 0 into four charged particles to two charged particles was measured to be B ( D 0 → V 4 ) / B ( D 0 → V 2 ) = 0.207 ± 0.016 ± 0.004 . The inclusive measurement of the observed production rate of the D 0 with a decay into four charged prongs in combination with external measurements of this topological branching ratio was used to determine the total D 0 production rate by neutrinos without additional assumption on the branching fractions. The value of this rate relative to the charged-current cross-section was found to be σ ( D 0 ) / σ ( CC ) = 0.0269 ± 0.0018 ± 0.0013 . In addition, the same normalization method was used to deduce the inclusive topological decay rate into final states with neutral particles only. A value of 0.218 ± 0.049 ± 0.036 was found for this branching fraction. From an observed number of three charged six-prong events the branching ratio into six charged particles was determined to be ( 1.2 −0.9 +1.3 ± 0.2 ) × 10 −3 . A measurement of the energy dependence of the D 0 production by neutrinos relative to the total charged-current cross-section is also reported. This measurement was used to deduce for m c , the effective charm-quark mass, a value of ( 1.42 ± 0.08 ) GeV / c 2 .

Published
2005
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3. Measurement of D*+ production in charged-current neutrino interactions

Author

I. Tezuka, Osamu Sato, Mitsuhiro Nakamura, Yoshihiro Sato, H. Meinhard, N. Nonaka, S. Buontempo, Gulsen Onengut, F. Di Capua, Koichi Kodama, Piero Zucchelli, V. Shamanov, G. Grella, K. Niu, T. Okusawa, P. Strolin, D. Kolev, Cristiano Bozza, S. Sorrentino, Biagio Saitta, G. De Rosa, Ilya Tsukerman, J. W. E. Uiterwijk, L. Scotto Lavina, S. Ogawa, Pierre Vilain, H. Shibuya, Nicola D'Ambrosio, Jiro Kawada, V. Tioukov, C. S. Yoon, Alexandre Rozanov, G. Grégoire, A. Kayis-Topaksu, P. F. Loverre, A. Satta, M. T. Muciaccia, B. Van de Vyver, M. Messina, L. Ludovici, K. Winter, T. Kawamura, Alfredo G. Cocco, A. Marotta, P. Gorbunov, J. Panman, Rudolf Oldeman, G. Romano, G. Fiorillo, N. Ushida, A. Artamonov, G. Rosa, J. S. Song, Gaston Wilquet, P. Tolun, K. Hoshino, M. de Jong, Masahiro Komatsu, T. Toshito, J. Goldberg, F. R. Spada, U. Kose, Murat Guler, I. Makhlioueva, Toshiyuki Nakano, R. van Dantzig, K. Narita, E. Barbuto, G. De Lellis, E. Di Capua, Chiara Sirignano, V. Khovansky, Shigeki Aoki, K. Niwa, N. Bruski, Th. Delbar, R. Tsenov, M. G. Catanesi, Ivana Hristova, Michiyuki Chikawa, P. Migliozzi, T. Hara, Motoaki Miyanishi, S. Kalinin, U. Dore, D. Frekers, Denis Favart, and R. Santacesaria

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Hadron, Neutrino beam, Nuclear physics, High Energy Physics::Experiment, Nuclear emulsion, Production (computer science), Neutrino, Nuclear Experiment, Neutrino oscillation, Charged current
Abstract

During the years 1994–1997, the emulsion target of the CHORUS detector was exposed to the wide-band neutrino beam of the CERN SPS of 27 GeV average neutrino energy. In total about 100 000 charged-current neutrino interactions were located in the nuclear emulsion target and fully reconstructed. A high-statistics sample of neutrino interactions with a D 0 in the final state was collected. Using the decay mode D * + → D 0 π + a production cross-section measurement of the D * + in neutrino–nucleon charged-current interactions was performed. The low Q-value of the decay was used to isolate a sample of candidate events containing a positive hadron with a small p T with respect to the D 0 direction. A signal of 22.1 ± 5.5 D * + events was obtained. The D * + production cross-section relative to the D 0 production cross-section, σ ( D * + ) / σ ( D 0 ) , was estimated to be 0.38 ± 0.09 ( stat ) ± 0.05 ( syst ) . From this result, the fraction of D 0 's produced via the decay of a D * was deduced to be 0.63 ± 0.17 . The D * + production cross-section relative to the ν μ charged-current interaction, σ ( D * + ) / σ ( CC ) , was estimated to be [ 1.02 ± 0.25 ( stat ) ± 0.15 ( syst ) ] % .

Published
2005
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4. Study of double-strangeness nuclei with hybrid-emulsion method (KEK-PS E373)

Author

K. Oyama, T. Kouketsu, B. Bassalleck, J. Parker, I. G. Park, C. O. Kim, H. Takahashi, Tomoko Yoshida, J. S. Song, N. Ushida, S. Ogawa, K. Hoshino, H. Akikawa, Toshiyuki Takahashi, K. Arai, H. Kanda, J.T. Yang, L. H. Zhu, J. K. Ahn, Michiko Sekimoto, Shigeki Aoki, Y. S. Iwata, Junji Tojo, Y. Nagase, S. J. Kim, Y. H. Iwata, J. Y. Kim, J. H. Chung, H. M. Park, H. Torii, Y. L. Lee, H. Okabe, J. W C McNabb, Atsushi Ichikawa, N. Yasuda, M. Mitsuhara, A. Rusek, Kwang Souk Sim, Y. S. Ra, T. Kawai, K. Imai, H. Tanaka, Saewoong Bahk, K. M. Baik, Fujio Takeutchi, M. Kaneko, Kazuhiro Yamamoto, Seok Kim, P. K. Saha, C.J. Yoon, D. Seki, C. S. Yoon, H. Shibuya, Y. Kondo, K. Tanida, J. T. Rhee, Masaharu Ieiri, M. S. Chung, S. Torikai, M. Yosoi, Hiroyuki Noumi, Kazuma Nakazawa, and C. Nagoshi

Subjects
Physics, Nuclear and High Energy Physics, Optics, Scintillating fiber, Spectrometer, business.industry, Track (disk drive), Detector, Emulsion, Nuclear emulsion, Strangeness, business
Abstract

An experiment to search for double-strangeness nuclei in nuclear emulsion is now being carried on as KEK-PS E373. Preliminary results of the data analysis for the K + spectrometer and the scintillating fiber detectors are presented. Status of the automatic track finding method for the emulsion is reported.

Published
2001
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5. Production of twin Λ-hypernuclei from Ξ− hyperon capture at rest

Author

M. Ieiri, Y. S. Ra, Hirotaka Takahashi, C.J. Yoon, K. Tanida, Y. S. Iwata, J. Parker, Y. L. Lee, M. Sekimoto, H. M. Park, C. S. Yoon, Sanghoon Kim, A. Rusek, B. Bassalleck, S. Torikai, Saewoong Bahk, H. Shibuya, M. Yosoi, K. Nakazawa, P. K. Saha, A. K. Ichikawa, K. Hoshino, N. Yasuda, L. H. Zhu, N. Ushida, H. Akikawa, J.H. Chung, Junji Tojo, J.W.C. McNabb, J. K. Ahn, Y. Kondo, K. M. Baik, J. T. Yang, J. S. Song, Tomohiro Takahashi, M. Kaneko, M.S. Chung, C. Nagoshi, Y. H. Iwata, S. Ogawa, H. Noumi, J.Y. Kim, H. Kanda, C. O. Kim, T. Kawai, Shigeki Aoki, M. Mitsuhara, D. Seki, T. Yoshida, F. Takeutchi, S.J. Kim, K. Oyama, Koji Yamamoto, Y. Nagase, H. Torii, J.T. Rhee, K. Arai, Kwang Souk Sim, T. Kouketsu, I. G. Park, H. Tanaka, H. Okabe, and K. Imai

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Atomic system, Hyperon, Neutron, Nuclear emulsion, Hypernucleus
Abstract

A hybrid emulsion experiment was carried out to study double-strangeness nuclei produced via Ξ− hyperon capture at rest with the expectation of ten times larger statistics than previous experiments. We have analyzed 5% of the total emulsion and found one “twin-hypernuclei” event involving the emission of two single-Λ hypernuclei and a nuclear fragment from a Ξ− hyperon stopping point. The event is interpreted as the decay of a Ξ − + 14 N atomic system to 5 Λ He + 5 Λ He + 4 He + neutron . The species of the Ξ−-atom and the fragmentation products are uniquely identified for the first time for twin-hypernuclei events. Combined with the results from a past hybrid-emulsion experiment, one double-Λ hypernucleus and three twin-hypernuclei events have been found from Ξ− captures on light emulsion nuclei. The ratio of the detected rate of double-Λ hypernuclei to that of twin-hypernuclei is compared with theoretical estimates.

Published
2001
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6. Study of the effects induced by lead on the emulsion films of the OPERA experiment

Author

A Anokhina, S Aoki, A Ariga, L Arrabito, D Autiero, A Badertscher, F Bay, A Bergnoli, F Bersani Greggio, M Besnier, D Bick, C Bozza, T Brugiere, R Brugnera, G Brunetti, S Buontempo, E Carrara, A Cazes, L Chaussard, M Chernyavsky, V Chiarella, N Chon-Sen, A Chukanov, L Consiglio, M Cozzi, F Dal Corso, G D'Amato, N D'Ambrosio, G De Lellis, Y Déclais, M De Serio, F Di Capua, D Di Ferdinando, A Di Giovanni, N Di Marco, C Di Troia, S Dmitrievski, A Dominjon, M Dracos, D Duchesneau, B Dulach, S Dusini, J Ebert, O Egorov, R Enikeev, A Ereditato, L S Esposito, J Favier, G Felici, T Ferber, R Fini, A Franceschi, T Fukuda, C Fukushima, V I Galkin, V A Galkin, A Garfagnini, G Giacomelli, M Giorgini, C Goellnitz, D Golubkov, Y Gornoushkin, G Grella, F Grianti, M Guler, G Gusev, C Gustavino, C Hagner, T Hara, M Hierholzer, S Hiramatsu, K Hoshino, M Ieva, K Jakovcic, J Janicsko Csathy, B Janutta, C Jollet, F Juget, T Kawai, M Kazuyama, S H Kim, M Kimura, J Knuesel, K Kodama, M Komatsu, U Kose, I Kreslo, I Laktineh, C Lazzaro, J Lenkeit, A Ljubicic, A Longhin, G Lutter, K Manai, G Mandrioli, S Manzoor, A Marotta, J Marteau, H Matsuoka, N Mauri, F Meisel, A Meregaglia, M Messina, P Migliozzi, S Miyamoto, P Monacelli, K Morishima, U Moser, M T Muciaccia, N Naganawa, T Naka, M Nakamura, T Nakamura, T Nakano, V Nikitina, K Niwa, Y Nonoyama, S Ogawa, V Osedlo, D Ossetski, A Paoloni, B D Park, I G Park, A Pastore, L Patrizii, E Pennacchio, H Pessard, C Pistillo, N Polukhina, M Pozzato, K Pretzl, P Publichenko, F Pupilli, T Roganova, G Rosa, I Rostovtseva, A Rubbia, A Russo, O Ryazhskaya, D Ryzhikov, Y Sato, O Sato, V Saveliev, G Sazhina, A Schembri, L Scotto Lavina, H Shibuya, S Simone, M Sioli, C Sirignano, G Sirri, J S Song, M Spinetti, L Stanco, N Starkov, M Stipcevic, T Strauss, P Strolin, V Sugonyaev, Y Taira, S Takahashi, M Tenti, F Terranova, V Tioukov, V Togo, P Tolun, V Tsarev, S Tufanli, N Ushida, C Valieri, P Vilain, M Vladimirov, L Votano, J L Vuilleumier, G Wilquet, B Wonsak, J Wurtz, C S Yoon, J Yoshida, Y Zaitsev, S Zemskova, A Zghiche, R Zimmermann, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), OPERA, A. ANOKHINA, S. AOKI, A. ARIGA, L. ARRABITO, D. AUTIERO, A. BADERTSCHER, F. BAY, A. BERGNOLI, F. BERSANI GREGGIO, M. BESNIER, D. BICK, C. BOZZA, T. BRUGIERE, R. BRUGNERA, G. BRUNETTI, S. BUONTEMPO, E. CARRARA, A. CAZES, L. CHAUSSARD, M. CHERNYAVSKY, V. CHIARELLA, N. CHON-SEN, A. CHUKANOV, L. CONSIGLIO, M. COZZI, F. DAL CORSO, G. D’AMATO, N. D’AMBROSIO, G. DE LELLIS, Y. DÉCLAIS, M. DE SERIO, F. DI CAPUA, D. DI FERDINANDO, A. DI GIOVANNI, N. DI MARCO, C. DI TROIA, S. DMITRIEVSKI, A. DOMINJON, M. DRACOS, D. DUCHESNEAU, B. DULACH, S. DUSINI, J. EBERT, O. EGOROV, R. ENIKEEV, A. EREDITATO, L.S. ESPOSITO, J. FAVIER, G. FELICI, T. FERBER, R. FINI, A. FRANCESCHI, T. FUKUDA, C. FUKUSHIMA, V.I. GALKIN, V.A. GALKIN, A. GARFAGNINI, G. GIACOMELLI, M. GIORGINI, C. GOELLNITZ, D. GOLUBKOV, Y. GORNOUSHKIN, G. GRELLA, F. GRIANTI, M. GULER, G. GUSEV, C. GUSTAVINO, C. HAGNER, T. HARA, M. HIERHOLZER, S. HIRAMATSU, K. HOSHINO, M. IEVA, K. JAKOVCIC, J. JANICSKO CSATHY, B. JANUTTA, C. JOLLET, F. JUGET, T. KAWAI, M. KAZUYAMA, S.H. KIM, M. KIMURA, J. KNUESEL, K. KODAMA, M. KOMATSU, U. KOSE, I. KRESLO, I. LAKTINEH, C. LAZZARO, J. LENKEIT, A. LJUBICIC, A. LONGHIN, G. LUTTER, K. MANAI, G. MANDRIOLI, S. MANZOOR, A. MAROTTA, J. MARTEAU, H. MATSUOKA, N. MAURI, F. MEISEL, A. MEREGAGLIA, M. MESSINA, P. MIGLIOZZI, S. MIYAMOTO, P. MONACELLI, K. MORISHIMA, U. MOSER, M.T. MUCIACCIA, N. NAGANAWA, T. NAKA, M. NAKAMURA, T. NAKAMURA, T. NAKANO, V. NIKITINA, K. NIWA, Y. NONOYAMA, S. OGAWA, V. OSEDLO, D. OSSETSKI, A. PAOLONI, B.D. PARK, I.G. PARK, A. PASTORE, L. PATRIZII, E. PENNACCHIO, H. PESSARD, C. PISTILLO, N. POLUKHINA, M. POZZATO, K. PRETZL, P. PUBLICHENKO, F. PUPILLI, T. ROGANOVA, G. ROSA, I. ROSTOVTSEVA, A. RUBBIA, A. RUSSO, O. RYAZHSKAYA, D. RYZHIKOV, Y. SATO, O. SATO, V. SAVELIEV, G. SAZHINA, A. SCHEMBRI, L. SCOTTO LAVINA, H. SHIBUYA, S. SIMONE, M. SIOLI, C. SIRIGNANO, G. SIRRI, J.S. SONG, M. SPINETTI, L. STANCO, N. STARKOV, M. STIPCEVIC, T. STRAUSS, P. STROLIN, V. SUGONYAEV, Y. TAIRA, S. TAKAHASHI, M. TENTI, F. TERRANOVA, V. TIOUKOV, V. TOGO, P. TOLUN, V. TSAREV, S. TUFANLI, N. USHIDA, C. VALIERI, P. VILAIN, M. VLADIMIROV, L. VOTANO, J.L. VUILLEUMIER, G. WILQUET, B. WONSAK, J. WURTZ, C.S. YOON, J. YOSHIDA, Y. ZAITSEV, S. ZEMSKOVA, A. ZGHICHE, R. ZIMMERMANN, DI CAPUA, Francesco, Anokhina, A, Aoki, S, Ariga, A, Arrabito, L, Autiero, D, Badertscher, A, Bay, F, Bergnoli, A, Greggio, F. Bersani, Besnier, M, Bick, D, Bozza, C, Brugiere, T, Brugnera, R, Brunetti, G, Buontempo, S, Carrara, E, Cazes, A, Chaussard, L, Chernyavsky, M, Chiarella, V, Chon Sen, N, Chukanov, A, Consiglio, L, Cozzi, M, Corso, F. Dal, D'Amato, G, D'Ambrosio, N, Lellis, G. De, Déclais, Y, Serio, M. De, Ferdinando, D. Di, Giovanni, A. Di, Marco, N. Di, Troia, C. Di, Dmitrievski, S, Dominjon, A, Dracos, M, Duchesneau, D, Dulach, B, Dusini, S, Ebert, J, Egorov, O, Enikeev, R, Ereditato, A, Esposito, L. S, Favier, J, Felici, G, Ferber, T, Fini, R, Franceschi, A, Fukuda, T, Fukushima, C, Galkin, V. I, Galkin, V. A, Garfagnini, A, Giacomelli, G, Giorgini, M, Goellnitz, C, Golubkov, D, Gornoushkin, Y, Grella, G, Grianti, F, Guler, M, Gusev, G, Gustavino, C, Hagner, C, Hara, T, Hierholzer, M, Hiramatsu, S, Hoshino, K, Ieva, M, Jakovcic, K, Csathy, J. Janicsko, Janutta, B, Jollet, C, Juget, F, Kawai, T, Kazuyama, M, Kim, S. H, Kimura, M, Knuesel, J, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Laktineh, I, Lazzaro, C, Lenkeit, J, Ljubicic, A, Longhin, A, Lutter, G, Manai, K, Mandrioli, G, Manzoor, S, Marotta, A, Marteau, J, Matsuoka, H, Mauri, N, Meisel, F, Meregaglia, A, Messina, M, Migliozzi, P, Miyamoto, S, Monacelli, P, Morishima, K, Moser, U, Muciaccia, M. T, Naganawa, N, Naka, T, Nakamura, M, Nakamura, T, Nakano, T, Nikitina, V, Niwa, K, Nonoyama, Y, Ogawa, S, Osedlo, V, Ossetski, D, Paoloni, A, Park, B. D, Park, I. G, Pastore, A, Patrizii, L, Pennacchio, E, Pessard, H, Pistillo, C, Polukhina, N, Pozzato, M, Pretzl, K, Publichenko, P, Pupilli, F, Roganova, T, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryazhskaya, O, Ryzhikov, D, Sato, Y, Sato, O, Saveliev, V, Sazhina, G, Schembri, A, Lavina, L. Scotto, Shibuya, H, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Song, J. S, Spinetti, M, Stanco, L, Starkov, N, Stipcevic, M, Strauss, T, Strolin, P, Sugonyaev, V, Taira, Y, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Togo, V, Tolun, P, Tsarev, V, Tufanli, S, Ushida, N, Valieri, C, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J. L, Wilquet, G, Wonsak, B, Wurtz, J, Yoon, C. S, Yoshida, J, Zaitsev, Y, Zemskova, S, Zghiche, A, Zimmermann, R., Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Bersani Greggio, F, Chon-Sen, N, Dal Corso, F, De Lellis, G, De Serio, M, Di Capua, F, Di Ferdinando, D, Di Giovanni, A, Di Marco, N, Di Troia, C, Esposito, L, Galkin, V, Janicsko Csathy, J, Kim, S, Muciaccia, M, Park, B, Park, I, Scotto Lavina, L, Song, J, Vuilleumier, J, Yoon, C, and Zimmermann, R

Subjects
Physics - Instrumentation and Detectors, Materials science, Physics::Instrumentation and Detectors, Nuclear engineering, RIVELATORI DI PARTICELLE, FISICA DEL NEUTRINO, FOS: Physical sciences, Particle identification methods, Tracking (particle physics), 01 natural sciences, law.invention, Particle identification method, law, Particle tracking detectors, 0103 physical sciences, Nuclear emulsion, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, Nuclear Experiment, 010306 general physics, Lead (electronics), Neutrino oscillation, Instrumentation, Mathematical Physics, Large detector systems for particle and astroparticle physics, 010308 nuclear & particles physics, Hybrid detector, RADIOATTIVITÀ NATURALE DI BASSO LIVELLO, Detector, Hybrid detectors, Instrumentation and Detectors (physics.ins-det), Particle tracking detector, 3. Good health, Condensed Matter::Soft Condensed Matter, Large detector systems for particle and astroparticle physic, Emulsion, RIVELATORI IBRIDI, Neutrino, Cloud chamber
Abstract

The OPERA neutrino oscillation experiment is based on the use of the Emulsion Cloud Chamber (ECC). In the OPERA ECC, nuclear emulsion films acting as very high precision tracking detectors are interleaved with lead plates providing a massive target for neutrino interactions. We report on studies related to the effects occurring from the contact between emulsion and lead. A low radioactivity lead is required in order to minimize the number of background tracks in emulsions and to achieve the required performance in the reconstruction of neutrino events. It was observed that adding other chemical elements to the lead, in order to improve the mechanical properties, may significantly increase the level of radioactivity on the emulsions. A detailed study was made in order to choose a lead alloy with good mechanical properties and an appropriate packing technique so as to have a low enough effective radioactivity., Comment: 19 pages, 11 figures

Published
2008
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7. Charged-particle multiplicities in charged-current neutrino and anti-neutrino-nucleus interactions

Author

S. Kalinin, E. Di Capua, U. Dore, E. Barbuto, Toshiyuki Nakano, A. Rozanov, K. Winter, G. De Lellis, A. Kayis-Topaksu, Ghislain Grégoire, Cristiano Bozza, Shigeki Aoki, K. Niu, I. Tezuka, M. T. Muciaccia, A. Satta, S. Sorrentino, C. S. Yoon, N. Nonaka, D. Frekers, V. Shamanov, C. Sirignano, G. De Rosa, G. Romano, Nicola D'Ambrosio, J. Panman, P. Strolin, S. Ogawa, Osamu Sato, Y. Sato, G. Fiorillo, Pierre Vilain, H. Meinhard, Mitsuhiro Nakamura, J. Kawada, Masahiro Komatsu, T. Okusawa, T. Toshito, Gulsen Onengut, F. R. Spada, U. Kose, Rudolf Oldeman, A. G. Cocco, Denis Favart, T. Hara, D. Kolev, Michiyuki Chikawa, H. Shibuya, N. Ushida, G. Grella, L. Ludovici, L. Scotto Lavina, K. Narita, Ivana Hristova, P. Gorbunov, Koichi Kodama, R. Santacesaria, G. Rosa, M. de Jong, P. Migliozzi, Gaston Wilquet, P. Tolun, J. W. E. Uiterwijk, Murat Guler, N. Bruski, P. Zucchelli, T. Kawamura, Ilya Tsukerman, K. Niwa, Th. Delbar, B. Van de Vyver, A. Artamonov, R. Tsenov, J. Goldberg, B. Saitta, R. van Dantzig, S. Buontempo, F. Di Capua, I. Makhlioueva, V. Khovansky, P. F. Loverre, J. S. Song, M. G. Catanesi, Motoaki Miyanishi, K. Hoshino, V. Tioukov, A. Marotta, Çukurova Üniversitesi, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CHORUS, A., Kayis Topaksu, G., Onengut, R. v., Dantzig, M. d., Jong, R. G., C., M., Guler, U., Kose, P., Tolun, M. G., Catanesi, M. T., Muciaccia, K., Winter, B. v., De, P., Vilain, G., Wilquet, B., Saitta, E. D., Capua, S., Ogawa, H., Shibuya, I. R., Hristovalo, T., Kawamura, D., Kolev, H., Meinhard, J., Panman, A., Rozanov, R., Tsenov, J. W., E., 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., Gregoire, S., Kalinin, I., Makhlioueva, A., Artamonov, P., Gorbunov, V., Khovansky, V., Shamanov, I., Tsukerman, N., Bruski, D., Freker, 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'Ambrosi, DE LELLIS, Giovanni, DE ROSA, Gianfranca, F. D., Capua, Fiorillo, Giuliana, A., Marotta, P., Migliozzi, L. S., 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, and I., Tezuka

Subjects
HIGH-ENERGY, COLLISIONS, Particle physics, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Monte Carlo method, FOS: Physical sciences, PROTON INTERACTIONS, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), neutrino interactions, multiplicity, SEARCH, Ionization, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], DISTRIBUTIONS, Nuclear emulsion, 010306 general physics, Engineering (miscellaneous), Scaling, Charged current, Physics, CHORUS EXPERIMENT, 010308 nuclear & particles physics, NU-P, HADRONS, Multiplicity (mathematics), Charged particle, 3. Good health, High Energy Physics::Experiment, Neutrino, Particle Physics - Experiment, EMULSION, SYSTEM
Abstract

The CHORUS experiment, designed to search for $\nu_{\mu}\to\nu_{\tau}$ oscillations, consists of a nuclear emulsion target and electronic detectors. In this paper, results on the production of charged particles in a small sample of charged-current neutrino-- and anti-neutrino--nucleus interactions at high energy are presented. For each event, the emission angle and the ionization features of the charged particles produced in the interaction are recorded, while the standard kinematic variables are reconstructed using the electronic detectors. The average multiplicities for charged tracks, the pseudo-rapidity distributions, the dispersion in the multiplicity of charged particles and the KNO scaling are studied in different kinematical regions. A study of quasi-elastic topologies performed for the first time in nuclear emulsions is also reported. The results are presented in a form suitable for use in the validation of Monte Carlo generators of neutrino--nucleus interactions., Comment: 17 pages, 5 figures

Published
2007
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8. Associated charm production in neutrino-nucleus interactions

Author

A. G. Cocco, N. Nonaka, H. Meinhard, Denis Favart, V. Shamanov, C. Sirignano, P. Strolin, L. Ludovici, A. Kayis-Topaksu, M. T. Muciaccia, B. Van de Vyver, Motoaki Miyanishi, K. Hoshino, S. Sorrentino, Y. Sato, S. Ogawa, J. Panman, J. Kawada, Ghislain Grégoire, S. Buontempo, P. Zucchelli, Ilya Tsukerman, F. Di Capua, T. Hara, P. Gorbunov, D. Kolev, Osamu Sato, A. Rozanov, G. Romano, M. de Jong, Gulsen Onengut, N. Ushida, Mitsuhiro Nakamura, E. Di Capua, M. G. Catanesi, A. Artamonov, K. Niu, Koichi Kodama, Emiliano Barbuto, V. Tioukov, Murat Guler, G. Rosa, R. Tsenov, Gaston Wilquet, J. Goldberg, A. Marotta, P. Tolun, Nicola D'Ambrosio, K. Narita, R. van Dantzig, P. Migliozzi, A. Satta, C. S. Yoon, Cristiano Bozza, Michiyuki Chikawa, J. W. E. Uiterwijk, J. S. Song, F. R. Spada, B. Saitta, U. Kose, I. Makhlioueva, G. Fiorillo, Ivana Hristova, R. Santacesaria, G. De Rosa, S. Kalinin, U. Dore, I. Tezuka, N. Bruski, D. Frekers, T. Kawamura, K. Winter, H. Shibuya, G. Grella, Toshiyuki Nakano, G. De Lellis, K. Niwa, Th. Delbar, Masahiro Komatsu, T. Okusawa, T. Toshito, L. Scotto Lavina, Rudolf Oldeman, Shigeki Aoki, P. F. Loverre, V. Khovansky, Pierre Vilain, Çukurova Üniversitesi, A., Kayis Topaksu, G., Onengut, R. v., Dantzig, M. d., Jong, R. G., C., M., Guler, U., Kose, P., Tolun, M. G., Catanesi, M. T., Muciaccia, K., Winter, B. v., De, P., Vilain, G., Wilquet, B., Saitta, E. D., Capua, S., Ogawa, H., Shibuya, I. R., Hristova, T., Kawamura, D., Kolev, H., Meinhard, J., Panman, A., Rozanov, R., Tsenov, J. W., E., 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., Gregoire, S., Kalinin, I., Makhlioueva, A., Artamonov, P., Gorbunov, V., Khovansky, V., Shamanov, I., Tsukerman, N., Bruski, D., Freker, 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, DE LELLIS, Giovanni, DE ROSA, Gianfranca, F. D., Capua, Fiorillo, Giuliana, A., Marotta, P., Migliozzi, L. S., 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., Tezuka, UCL - SC/PHYS - Département de physique, Kayis Topaksu, A., Önengüt, G., van Dantzig, R., de Jong, M., Oldeman, R. G. C., Güler, M., Köse, U., Tolun, P., Catanesi, M. G., Muciaccia, M. T., Winter, K., Van de Vyver, B., Vilain, P., Wilquet, G., Saitta, B., Di Capua, E., Ogawa, S., Shibuya, H., Hristova, I. R., Kawamura, T., Kolev, D., Meinhard, H., Panman, J., Rozanov, A., Tsenov, R., Uiterwijk, J. W. E., Zucchelli, P., Goldberg, J., Chikawa, M., Song, J. S., Yoon, C. S., Kodama, K., Ushida, N., Aoki, S., Hara, T., Delbar, T., Favart, D., Grégoire, G., Kalinin, S., Makhlioueva, I., Artamonov, A., Gorbunov, P., Khovansky, V., Shamanov, V., Tsukerman, I., Bruski, N., Frekers, D., Hoshino, K., Kawada, J., Komatsu, M., Miyanishi, M., Nakamura, M., Nakano, T., Narita, K., Niu, K., Niwa, K., Nonaka, N., Sato, O., Toshito, T., Buontempo, S., Cocco, A. G., D’Ambrosio, N., De Lellis, G., De Rosa, G., DI CAPUA, Francesco, Marotta, A., Migliozzi, P., Scotto Lavina, L., Strolin, P., Tioukov, V., Okusawa, T., Dore, U., Loverre, P. F., Ludovici, L., Rosa, G., Santacesaria, R., Satta, A., Spada, F. R., Barbuto, E., Bozza, C., Grella, G., Romano, G., Sirignano, C., Sorrentino, S., Sato, Y., and Tezuka, I.

Subjects
Quark, Particle physics, Physics and Astronomy (miscellaneous), FOS: Physical sciences, High Energy Physics - Experiment, Nuclear physics, EVENTS, High Energy Physics - Experiment (hep-ex), SEARCH, SCATTERING, PARTICLES, Nuclear emulsion, TRIMUON PRODUCTION, Charm (quantum number), TEVATRON, Engineering (miscellaneous), OSCILLATION, Physics, Muon, Neutral current, ELECTROWEAK PARAMETERS, CHORUS, Pair production, Neutrino, Particle Physics - Experiment, Lepton
Abstract

In this paper a search for associated charm production both in neutral and charged current $\nu$-nucleus interactions is presented. The improvement of automatic scanning systems in the {CHORUS} experiment allows an efficient search to be performed in emulsion for short-lived particles. Hence a search for rare processes, like the associated charm production, becomes possible through the observation of the double charm-decay topology with a very low background. About 130,000 $\nu$ interactions located in the emulsion target have been analysed. Three events with two charm decays have been observed in the neutral-current sample with an estimated background of 0.18$\pm$0.05. The relative rate of the associated charm cross-section in deep inelastic $\nu$ interactions, $\sigma(c\bar{c}\nu)/\sigma_\mathrm{NC}^\mathrm{DIS}= (3.62^{+2.95}_{-2.42}({stat})\pm 0.54({syst}))\times 10^{-3}$ has been measured. One event with two charm decays has been observed in charged-current $\nu_\mu$ interactions with an estimated background of 0.18$\pm$0.06 and the upper limit on associated charm production in charged-current interactions at 90% C.L. has been found to be $\sigma (c\bar{c} \mu^-)/\sigma_\mathrm{CC} < 9.69 \times 10^{-4}$., Comment: 10 pages, 4 figures

Published
2007

9. Quasifree p(K, K)Ξ reaction in nuclear emulsion

Author

T. Hara, I. Tezuka, M. Nakamura, I. G. Park, Saewoong Bahk, R. Ozaki, Y. Maeda, S. Nakanishi, T. Kuze, R. Tanaka, C. O. Kim, T. Iijima, Fujio Takeutchi, Yoshihiro Sato, Ryuichi Takashima, M. S. Park, A. Matsui, N. Ushida, H. Okabe, Y.B. Sim, S. Asai, K. Imai, H. Funahashi, J. Yokota, H. Togawa, K. Murakami, K. Hoshino, J. Y. Kim, Masaharu Ieiri, K. Sakai, C.H. Hahn, T. Jin-ya, Koichi Kodama, S. H. Chung, M. Iida, S. Ono, H. Shibuya, M. Hanabata, Hajime Shimizu, Yasuyuki Matsuda, T. Sasaki, N. Yasuda, C. Nagoshi, C. S. Yoon, Shigeki Aoki, Kimio Niwa, D. C. Kim, J. S. Song, Yoshitaka Itow, Takashi Z. Nakano, M. Kazuno, Kazuma Nakazawa, S. Ogawa, H. Tajima, Akira Masaike, M. Sugimoto, M. Teranaka, C.J. Yoon, and Kazuhiro Tanaka

Subjects
Physics, Nuclear reaction, Nuclear physics, Nuclear and High Energy Physics, medicine.anatomical_structure, Mean free path, medicine, Analytical chemistry, Nuclear emulsion, Nuclear matter, Nucleus, Vertex (geometry)
Abstract

A study of 1.66 GeV c K − beam induced ( K − ,K + ) reactions in the nuclear emulsion target is presented and 796 ( K − , K + ) reaction vertices ( p K + ⩾ 1 GeV /c ) containing 18 single hyperfragments are identified. There is no clear(spatially separated) double hyperfragment nor twin single hyperfragment in the identified 796 ( K − ,K + ) reactions. These events are classified and their characteristics are described in detail. In the region p K + ⩾ 1 GeV /c where the quasifree K − (p) → K + Ξ − is the dominant process, the probability of Ξ − emission from the reaction vertex is determined to be 73.9 −4.6 +4.5 %. From this value, the mean free path of Ξ − in a nucleus is estimated to be 4.7 −1.0 +1.5 fm for 〈p Ξ − 〉 ∼ 0.6 GeV /c by assuming a simple model of uniform nuclear matter.

Published
1998
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10. Production of a twin single hypernuclei and the Ξ−-nuclear interaction

Author

Y. Maeda, T. Hara, N. Yasuda, N. Ushida, M. S. Park, J. Y. Kim, M. Sugimoto, H. Oda, T. Jin-ya, H. Tajima, R. Tanaka, S.H. Oh, Ryuichi Takashima, C.H. Hahn, Akira Masaike, D. C. Kim, C. Nagoshi, Y.B. Sim, M. Nakamura, K. Kikuchi, Shigeki Aoki, H. Funahashi, S. Ogawa, A. Masuoka, Koichi Kodama, M. Kazuno, C. O. Kim, R. Ozaki, H. Togawa, Yasuyuki Matsuda, J. Yokota, S. Nakanishi, Masaharu Ieiri, S. H. Chung, S. Hirata, I. G. Park, Saewoong Bahk, M. Teranaka, Kazuma Nakazawa, J. S. Song, Yoshitaka Itow, Yoshihiro Sato, Takashi Z. Nakano, H. Okabe, K. Imai, Takashi Watanabe, I. Tezuka, K. S. Chung, K. Hoshino, H. M. Shimizu, T. Ijima, Kazuhiro Tanaka, H. Shibuya, Kimio Niwa, C. S. Yoon, and Fujio Takeutchi

Subjects
Nuclear interaction, Physics, Nuclear physics, Nuclear and High Energy Physics, Binding energy, Nuclear emulsion, Production (computer science), State (functional analysis), Atomic physics, Hypernucleus, Event (particle physics)
Abstract

An event accompanied by two single hyperfragments emitted from a Ξ− nuclear capture at rest was found in a nuclear emulsion. It is interpreted as a Ξ−-12C bound system decaying into either a) Λ4H + Λ9Be, b) Λ 4 H + Λ 9 Be ∗ or c) Λ 4 H ∗ + Λ 9 Be . The binding energy of the Ξ-12C system is obtained as a) 3.70−0.19+0.18 MeV, b) 0.62−0.19+0.18 MeV and c) 2.66−0.19+0.18 MeV, respectively. The system is considered as a Ξ− hypernucleus in the cases a) and c). In case b), this event and another event of the same type (Yokohama event) can both be interpreted as a decay from the Ξ-12C system in 2P state when a shallow Ξ−-nuclear potential is assumed.

Published
1995
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11. Measurement of Γ(D0 → K−μ+ν)/Γ(D0→ μ+X using a D tag

Author

K. Kodama, N. Ushida, A. Mokhtarani, V.S. Paolone, J.T. Volk, J.O. Wilcox, P.M. Yager, R.M. Edelstein, A.P. Freyberger, D.B. Gibaut, R.J. Lipton, W.R. Nichols, D.M. Potter, J.S. Russ, C. Zhang, Y. Zhang, H.I. Jang, J.Y. Kim, T.I. Kim, I.T. Lim, M.Y. Pac, B.R. Baller, R.J. Stefanski, K. Nakazawa, K.S. Chung, S.H. Chung, D.C. Kim, I.G. Park, M.S. Park, J.S. Song, C.S. Yoon, M. Aryal, N.W. Reay, R.A. Sidwell, N.R. Stanton, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S.D. Chang, B.G. Cheon, J.H. Cho, J.S. Kang, C.O. Kim, K.Y. Kim, T.Y. Kim, J.C. Lee, S.B. Lee, G.Y. Lim, S.W. Nam, T.S. Shin, K.S. Sim, J.K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, M. Nomura, H. Tajima, S. Yoshida, J.M. Dunlea, S.G. Frederiksen, S. Kuramata, B.G. Lundberg, G.A. Oleynik, R. Reibel, K. Moriyama, H. Shibata, G.R. Kalbfleisch, P. Skubic, J.M. Snow, S.E. Willis, O. Kusumoto, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Kazuno, T. Koya, E. Niu, S. Ogawa, H. Shibuya, S. Watanabe, N. Yasuda, M. Kamiya, Y. Sato, I. Tezuka, M. Yamaki, S.Y. Bahk, and S.K. Kim

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Meson, Branching fraction, Hadron, Analytical chemistry, Nuclear emulsion, Decay chain
Abstract

The relative branching fraction RK = Γ(D0 → K−μ+v)/Γ(D0 → μ−X) has been measured by Fermilab experiment E653, using D0 mesons produced by 600 GeV π−. The semimuonic decay sample of 232 events was identified by the decay chain D ∗+ → D 0 π + , D 0 → μ + h − X , where h is a hadron. The Kμv component was extracted from the joint distribution of these events in the D0 decay variables Mmin and pTh. We find RK = 0.472 ± 0.051 (stat) ± 0.040 (sys), and use a world average of the D0 → Klv branching fraction to obtain the D0 inclusive semimuonic branching fraction B(D0 → μ+X) = (7.67 ± 1.13)%.

Published
1994
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12. New techniques for emulsion analysis in a hybrid experiment

Author

K. Kodama, N. Ushida, A. Mokhtarani, V.S. Paolone, J.T. Volk, J.O. Wilcox, P.M. Yager, R.M. Edelstein, A.P. Freyberger, D.B. Gibaut, R.J. Lipton, W.R. Nichols, D.M. Potter, J.S. Russ, C. Zhang, Y. Zhang, H.I. Jang, J.Y. Kim, T.I. Kim, I.T. Lim, M.Y. Pac, B.R. Baller, R.J. Stefanski, K. Nakazawa, K.S. Chung, S.H. Chung, D.C. Kim, I.G. Park, M.S. Park, J.S. Song, C.S. Yoon, S. Kuramata, M. Chikawa, S. Aoki, T. Hara, Y. Takahashi, K. Taruma, S.D. Chang, D.G. Cheon, J.H. Cho, J.S. Kang, C.O. Kim, K.Y. Kim, T.Y. Kim, J.C. Lee, S.B. Lee, G.Y. Lim, S.W. Nam, T.S. Shin, K.S. Sim, J.K. Woo, A. Gauthier, K. Hoshino, S. Ishikawa, T. Kawai, H. Kitamura, K. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niwa, M. Nomura, H. Sasaki, H. Tajima, Y. Tomita, S. Yoshida, M. Aryal, J.M. Dunlea, S.G. Frederiksen, B.G. Lundberg, G.A. Oleynik, N.W. Reay, K. Reibel, R.A. Sidwell, N.R. Stanton, G.R. Kalbfleisch, P. Skubic, J.M. Snow, S.E. Willis, S. Ohashi, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Okabe, J. Yokota, M. Adachi, S. Ikegami, M. Kazuno, T. Koya, E. Niu, H. Shibuya, S. Watanabe, Y. Sato, I. Tezuka, S.Y. Bahk, and S.K. Kim

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Nuclear engineering, Emulsion, Nuclear emulsion, Fermilab, Instrumentation, Reliability (statistics)
Abstract

A new method, called graphic scanning, was developed by the Nagoya University Group for emulsion analysis in a hybrid experiment. This method enhances both speed and reliability of emulsion analysis. Details of the application of this technique to the analysis of Fermilab experiment E653 are described.

Published
1994
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13. Measurement of beauty hadron pair production in 600 GeV/c π− emulsion interactions

Author

K. Kodama, N. Ushida, A. Mokhtarani, V.S. Paolone, J.T. Volk, J.O. Wilcox, P.M. Yager, R.M. Edelstein, A.P. Freyberger, D.B. Gibaut, R.J. Lipton, W.R. Nichols, D.M. Potter, J.S. Russ, C. Zhang, Y. Zhang, H.I. Jang, J.Y. Kim, T.I. Kim, I.T. Lim, M.Y. Pac, B.R. Baller, R.J. Stefanski, K. Nakazawa, K.S. Chung, S.H. Chung, D.C. Kim, I.G. Park, M.S. Park, J.S. Song, C.S. Yoon, M. Chikawa, T. Abe, T. Fujii, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S.D. Chang, B.G. Cheon, J.H. Cho, J.S. Kang, C.O. Kim, K.Y. Kim, T.Y. Kim, J.C. Lee, S.B. Lee, G.Y. Lim, S.W. Nam, T.S. Shin, K.S. Sim, J.K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanashi, K. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, M. Nomura, H. Tajima, S. Yoshida, M. Aryal, J.M. Dunlea, S.G. Frederiksen, S. Kuramata, B.G. Lundberg, G.A. Olevnik, N.W. Reay, K. Reibel, R.A. Sidwell, N.R. Stanton, K. Moriyama, H. Shibata, G.R. Kalbfleisch, P. Skubic, J.M. Snow, S.E. Willis, O. Kusumoto, T. Okusawa, M. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Adachi, M. Kazuno, E. Niu, H. Shibuya, S. Watanabe, I. Ohtsuka, Y. Sato, I. Tezuka, S.Y. Bahk, and S.K. Kim

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Cross section (physics), Particle physics, Pair production, Hadron, Nuclear emulsion, Fermilab, Nucleon
Abstract

We report on the production characteristics and total cross section for 9 beauty hadron pairs produced by a 600 GeV/ c π − beam, the first such information in this energy region. The events were detected in the hybrid emulsion spectrometer of Fermilab Experiment E653. The measured pair cross section for all χ F , assuming linear A dependence, is 33±11 (stat.)±6(syst.) nb/nucleon. Fits of the inclusive single-hadron production distribution to the forms d σ d χ F ∝ (1−|χ F −χ 0 |) n and d σ d p T 2 ∝ exp (−bp t 2 ) give n=5.0 −2.1−1.7 +2.7+1.7 , χ 0 =0.06 −0.07−0.03 +0.06+0.02 , and b=0.13 −0.04−0.02 +0.05+0.02 ( GeV /c −2 . .The pairs tend to be produced back-to-back.

Published
1993
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14. Production of Two Single- Hypernuclei by - Capture

Author

T. Hara, H. M. Shimizu, J. Y. Kim, K. Hoshino, C.H. Hahn, I. Tezuka, M. Nakamura, M. Teranaka, T. Iijima, D. C. Kim, Kimio Niwa, Saewoong Bahk, Ryuichi Takashima, Takashi Watanabe, K. Kikuchi, N. Yasuda, S. H. Chung, K. S. Chung, N. Ushida, A. Masuoka, Koichi Kodama, F. Takeutchi, J. Yokota, C. O. Kim, Kazuma Nakazawa, Yoshihiro Sato, H. Oda, H. Okabe, H. Togawa, Masaharu Ieiri, T. Jin-ya, M. Sugimoto, J. S. Song, Yoshitaka Itow, Takashi Z. Nakano, H. Funahashi, Kenichi Imai, H. Tajima, Akira Masaike, Kazuhiro Tanaka, Yasuyuki Matsuda, Y. Maeda, S. Nakanishi, S. Hirata, I. G. Park, R. Ozaki, M. S. Park, C. Nagoshi, M. Tairadate, M. Kazuno, C. S. Yoon, H. Shibuya, S. Ono, and Shigeki Aoki

Subjects
Physics, Nuclear physics, Stars, medicine.anatomical_structure, Physics and Astronomy (miscellaneous), medicine, Hyperon, Proton Synchrotron, Nuclear emulsion, Atomic physics, Absorption (chemistry), Nucleus, Beam (structure)
Abstract

The S= −2 hypernuclear states formed through (K − , K + ) reactions have been studied by using the 1.66 GeV/c K − beam provided by KEK Proton Synchrotron. Investigation has been done on the stars due to the capture of the ξ − hyperons at rest in nuclear emulsion, which hyperons were produced in (K − , K + ) reactions. We observed a clear case of an absorption of ξ − hyperon at rest by a nucleus followed by a back-to-back emission of two single-Λ hypernuclei

Published
1993
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15. Measurement of the branching ratio for

Author

K. Kodama, N. Ushida, A. Mokhtarani, V.S. Paolone, J.T. Volk, J.O. Wilcox, P.M. Yager, R.M. Edelstein, A.P. Freyberger, D.B. Gibaut, R.J. Lipton, W.R. Nichols, D.M. Potter, J.S. Russ, C. Zhang, Y. Zhang, H.I. Jang, J.Y. Kim, T.I. Kim, I.T. Lim, M.Y. Pac, B.R. Baller, R.J. Stefanski, K. Nakazawa, K.S. Chung, S.H. Chung, D.C. Kim, I.G. Park, M.S. Park, J.S. Song, C.S. Yoon, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S.D. Chang, B.G. Cheon, J.H. Cho, J.S. Kang, C.O. Kim, K.Y. Kim, T.Y. Kim, J.C. Lee, S.B. Lee, G.Y. Lim, S.W. Nam, T.S. Shin, K.S. Sim, J.K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, H. Tajima, J.M. Dunlea, S.G. Frederiksen, S. Kuramata, B.G. Lundberg, G.A. Oleynik, N.W. Reay, K. Reibel, R.A. Sidwell, N.R. Stanton, K. Moriyama, H. Shibata, G.R. Kalbfleisch, P. Skubic, J.M. Snow, S.E. Willis, O. Kusumoto, T. Okusawa, m. Teranaka, T. Tominaga, T. Yoshida, H. Yuuki, H. Okabe, J. Yokota, M. Adachi, M. Kazuno, E. Niu, H. Shibuya, S. Watanabe, I. Ohtsuka, Y. Sato, I. Tezuka, S.Y. Bahk, and S.K. Kim

Subjects
Normalization (statistics), Physics, Nuclear and High Energy Physics, Branching fraction, Analytical chemistry, Nuclear emulsion
Abstract

The branching ratio for the decay mode D + → K ∗0 μ + ν has been measured with two methods. The first uses D0→K−μ+ν for normalization, and yields the result B( D + → K ∗0 μ + ν)=(3.25±0.71±0.75)% . From this method we also obtain the direct measurement Γ( D + → K ∗0 μ + ν)/Γ( D 0 → K − μ + ν)=0.43±0.09±0.09 . The second method uses the mode D+→K−π+π+ for normalization and yields B( D + → K ∗0 μ + ν)=(4.18±0.66±0.96)% . Combining the results of the two methods yields B( D + → K ∗0 μ + ν)=(3.57±0.96)% .

Published
1992
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16. Charm Production by 350 GeV/c - Interactions in Nuclear Emulsion

Author

H. Tajima, A. Marzari-Chiesa, Kazuma Nakazawa, M. Nakamura, K. Hoshino, Y. Maeda, M. A. Mazzoni, F. Minakawa, G. Baroni, C. Sgarbi, Shigeki Tasaka, H. Sletten, Gilbert Poulard, M. G. Catanesi, Makoto Kobayashi, R. Arnold, V. Bisi, K. Niu, S. Simone, L. Ramello, E. Radicioni, M. De Vincenzi, G. Rosa, Sartori M, G. Martellotti, H. Sasaki, M. Kazuno, G. Romano, Y. Yanagisawa, D.H. Davis, Yoshihiro Sato, M. T. Muciaccia, M. J. Esten, N. Ushida, D.N. Tovee, Gianni Penso, Franco Meddi, Motoaki Miyanishi, S. Natali, Shigeki Aoki, H. Shibuya, S. Di Liberto, Kimio Niwa, K. Chiba, K. Kodama, I. Tezuka, and A.C. Breslin

Subjects
Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Meson, Hadron, Elementary particle, Nuclear physics, Pion, High Energy Physics::Experiment, Nuclear emulsion, Charm (quantum number), Nuclear Experiment, Nucleon
Abstract

Results are presented on the production cross-section of charmed particles obtained from the WA75 emulsion hybrid experiment. The events, selected by the presence of a muon with a high momentum transverse to the beam direction, were located and analysed in nuclear emulsions. A Monte Carlo simulation allowed the computation of acceptances due to both apparatus and selection, as well as scanning and finding efficiencies. The ccBAR hadroproduction cross-section has been determined over the entire X(F) region as sigma(ccBAR)=23.1+/-1.3(stat)+4.0/-3.3(syst) mu-b per nucleon assuming an A0.87 dependence.

Published
1992
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17. Cross-section measurement for quasi-elastic production of charmed baryons in νN interactions

Author

I Maklioueva, O. Melzer, M. Serin-Zeyrek, Michiyuki Chikawa, E. Arik, C. Pistillo, M. T. Muciaccia, Shigeki Aoki, Ivana Hristova, E. Di Capua, S. Kalinin, R. Santacesaria, V. Khovansky, U. Dore, H. Meinhard, P. Strolin, E. Pesen, S. Sorrentino, I. Tezuka, G. L. Pittoni, Toshiyuki Nakano, J. S. Song, Motoaki Miyanishi, S. Buontempo, G. De Lellis, K. Niwa, F. Di Capua, D. Frekers, Mathieu Doucet, Y. Sato, Mitsuhiro Nakamura, S. Ogawa, K. Nakamura, Ramazan Sever, Nicola D'Ambrosio, D. Kolev, K. Hoshino, A. G. Cocco, Denis Favart, J. Kawada, Gulsen Onengut, N. Ushida, T. Hara, K. Winter, B. Saitta, Rudolf Oldeman, P. Migliozzi, F. R. Spada, C. S. Yoon, U. Kose, G. De Rosa, Pierre Vilain, N. Bruski, T. Kawamura, I.M. Papadopoulos, Mihail Chizhov, Ghislain Grégoire, M. G. Catanesi, V. Tioukov, K. Niu, G. Romano, A. Artamonov, H. Shibuya, L. Ludovici, A. Marotta, Osamu Sato, N. Nonaka, E. Radicioni, M. Ieva, Antonio Ereditato, P. Righini, V. Shamanov, C. Sirignano, P. Gorbunov, A. Satta, M. de Jong, R. Tsenov, J. Goldberg, Jan Visschers, G. Rosa, R. van Dantzig, Gaston Wilquet, S. Simone, M. De Serio, P. Tolun, A. Bülte, B. Van de Vyver, S. Ricciardi, Koichi Kodama, Murat Guler, J. W. E. Uiterwijk, L. Scotto Lavina, M. Messina, Th. Delbar, A. Rozanov, G. Fiorillo, G. Grella, Mehmet Zeyrek, Masahiro Komatsu, Cristiano Bozza, T. Okusawa, T. Toshito, P. F. Loverre, K. Narita, E. Barbuto, J. Panman, P. Zucchelli, Ilya Tsukerman, A. Kayis-Topaksu, Çukurova Üniversitesi, Kayis Topaksu, A., Onengüt, G., van Dantzig, R., de Jong, M., Melzer, O., Oldeman, R. G. C., Pesen, E., Spada, F. R., Visschers, J. L., Güler, M., Köse, U., Serin Zeyrek, M., Sever, R., Tolun, P., Zeyrek, M. T., Catanesi, M. G., De Serio, M., Ieva, M., Muciaccia, M. T., Radicioni, E., Simone, S., Bülte, A., Winter, K., Van de Vyver, B., Vilain, P., Wilquet, G., Pittoni, G. L., Saitta, B., Di Capua, E., Ogawa, S., Shibuya, H., Artamonov, A., Chizhov, M., Doucet, M., Hristova, I. R., Kawamura, T., Kolev, D., Meinhard, H., Panman, J., Papadopoulos, I. M., Ricciardi, S., Rozanov, A., Tsenov, R., Uiterwijk, J. W. E., Zucchelli, P., Goldberg, J., Chikawa, M., Arik, E., Song, J. S., Yoon, C. S., Kodama, K., Ushida, N., Aoki, S., Hara, T., Delbar, T., Favart, D., Grégoire, G., Kalinin, S., Maklioueva, I., Gorbunov, P., Khovansky, V., Shamanov, V., Tsukerman, I., Bruski, N., Frekers, D., Hoshino, K., Kawada, J., Komatsu, M., Miyanishi, M., Nakamura, M., Nakano, T., Narita, K., Niu, K., Niwa, K., Nonaka, N., Sato, O., Toshito, T., Buontempo, S., Cocco, A. G., D'Ambrosio, N., De Lellis, G., De Rosa, G., DI CAPUA, Francesco, Ereditato, A., Fiorillo, Giuliana, Marotta, A., Messina, M., Migliozzi, P., Pistillo, C., Scotto lavina, L., Strolin, P., Tioukov, V., Nakamura, K., Okusawa, T., Dore, U., Loverre, P. F., Ludovici, L., Righini, P., Rosa, G., Santacesaria, R., Satta, A., Barbuto, E., Bozza, C., Grella, G., Romano, G., Sirignano, C., Sorrentino, S., Sato, Y., Tezuka, I., T., Nakano, K., Narita, K., Niu, K., Niwa, N., Nonaka, O., Sato, T., Toshito, S., Buontempo, A. G., Cocco, N., D'Ambrosio, DE LELLIS, Giovanni, DE ROSA, Gianfranca, F. D., Capua, A., Ereditato, A., Marotta, M., Messina, P., Migliozzi, C., Pistillo, L. S., Lavina, P., Strolin, V., Tioukov, K., Nakamura, T., Okusawa, U., Dore, P. F., Loverre, L., Ludovici, P., Righini, G., Rosa, R., Santacesaria, A., Satta, E., Barbuto, C., Bozza, G., Grella, G., Romano, C., Sirignano, S., Sorrentino, Y., Sato, and I., Tezuka

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, CHORUS EXPERIMENT, High Energy Physics::Phenomenology, Physique atomique et nucléaire, Baryon, Nuclear physics, Charmed baryons, Cross section (physics), NEUTRINO-PRODUCTION, CHARGED-CURRENT INTERACTIONS, Nuclear emulsion, Production (computer science), High Energy Physics::Experiment, Charm (quantum number), Neutrino, Nuclear Experiment, Charged current, Particle Physics - Experiment
Abstract

A study of quasi-elastic production of charmed baryons in charged-current interactions of neutrinos with the nuclear emulsion target of CHORUS is presented. In a sample of about 46 000 interactions located in the emulsion, candidates for decays of short-lived particles were identified by using new automatic scanning systems and later confirmed through visual inspection. Criteria based both on the topological and kinematical characteristics of quasi-elastic charm production allowed a clear separation between events of this type and those in which charm is produced in deep inelastic processes. A final sample containing 13 candidates consistent with quasi-elastic production of a charmed baryon with an estimated background of 1.7 events was obtained. At the average neutrino energy of 27 GeV the cross-section for the total quasi-elastic production of charmed baryons relative to the νN charged-current cross-section was measured to be σ(QE)/σ(CC) = (0.23-0.06+0.02(stat)×10-2. Through an analysis of the topology at the production and decay vertices the relative cross-sections were measured separately for singly (Λc +, ∑c+, ∑c +*) and doubly (∑c++, ∑ c++*) charged baryons. © 2003 Published by Elsevier B.V., 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2003

18. Observation of one event with the characteristics of associated charm production in neutrino charged-current interactions

Author

A. Kayis-Topaksu, A. G. Cocco, M. Messina, I Maklioueva, Denis Favart, G. Fiorillo, P. F. Loverre, G. De Rosa, K. Niu, E. Arik, V. Palladino, B. Saitta, Osamu Sato, K. Niwa, Th. Delbar, Murat Guler, M. Miyanishi, G. Grella, Michiyuki Chikawa, G. De Lellis, Y. Sato, Masahiro Komatsu, T. Wolff, M. G. Catanesi, Nicola D'Ambrosio, T. Okusawa, D. Kolev, V. Khovansky, T. Toshito, S. Kalinin, Gulsen Onengut, Jan Visschers, N. Armenise, Koichi Kodama, T. Kawamura, U. Dore, S. Sorrentino, N. Ushida, David Cussans, M. De Serio, A. Bülte, K. Hoshino, P. Gorbunov, J. W. E. Uiterwijk, S. Ogawa, Toshiyuki Nakano, O. Melzer, M. de Jong, Ivana Hristova, S. Simone, R. Santacesaria, P. Zucchelli, Ilya Tsukerman, F. R. Spada, A. Maslennikov, P. Strolin, Cristiano Bozza, B. Van de Vyver, S. Ricciardi, E. Pesen, I. Tezuka, A. Satta, R. El-Aidi, P. Migliozzi, L. Ludovici, E. Di Capua, J. Konijn, N. Nonaka, P Righini, M. Ieva, Mihail Chizhov, Antonio Ereditato, V. Shamanov, Ramazan Sever, G. Rosa, Gaston Wilquet, P. Tolun, D. Frekers, A. Artamonov, H. Shibuya, T. Hara, R. Tsenov, J. Goldberg, N. Bruski, R. van Dantzig, S. Buontempo, F. Di Capua, Mathieu Doucet, K. Winter, Mitsuhiro Nakamura, K. Nakamura, C. S. Yoon, I.M. Papadopoulos, M. T. Muciaccia, K. Narita, E. Barbuto, Valeri Tioukov, Pierre Vilain, J. Panman, M. Serin-Zeyrek, Shigeki Aoki, Mehmet Zeyrek, A. Rozanov, H. Meinhard, Rudolf Oldeman, Ghislain Grégoire, G. Romano, J. S. Song, E. Radicioni, Jürgen Brunner, D. Rondeshagen, Kayis Topaksu, A, Onengüt, G, van Dantzig, R, de Jong, M, Konijn, J, Melzer, O, Oldeman, R. G. C, Pesen, E, Visschers, J. L, Güler, M, Serin Zeyrek, M, Sever, R, Tolun, P, Zeyrek, M. T, Armenise, N, Catanesi, M. G, De Serio, M, Ieva, M, Muciaccia, M. T, Radicioni, E, Simone, S, Bülte, A, Winter, K, El Aidi, R, Van de Vyver, B, Vilain, P, Wilquet, G, Saitta, B, Di Capua, E, Ogawa, S, Shibuya, H, Artamonov, A, Brunner, J, Chizhov, M, Cussans, D, Doucet, M, Hristova, I. R, Kolev, D, Meinhard, H, Panman, J, Papadopoulos, I. M, Ricciardi, S, Rozanov, A, Tsenov, R, Uiterwijk, J. W. E, Zucchelli, P, Goldberg, J, Chikawa, M, Arik, E, Song, J. S, Yoon, C. S, Kodama, K, Ushida, N, Aoki, S, Hara, T, Delbar, T, Favart, D, Grégoire, G, Kalinin, S, Maklioueva, I, Gorbunov, P, Khovansky, V, Shamanov, V, Tsukerman, I, Bruski, N, Frekers, D, Rondeshagen, D, Wolff, T, Hoshino, K, Komatsu, M, Miyanishi, M, Nakamura, M, Nakano, T, Narita, K, Niu, K, Niwa, K, Nonaka, N, Sato, O, Toshito, T, Buontempo, S, Cocco, A. G, D'Ambrosio, N, De lellis, G, De Rosa, G, DI CAPUA, Francesco, Ereditato, A, Fiorillo, Giuliana, Kawamura, T, Messina, M, Migliozzi, P, Palladino, V, Strolin, P, Tioukov, V, Nakamura, K, Okusawa, T, Dore, U, Loverre, P. F, Ludovici, L, Maslennikov, A, Righini, P, Rosa, G, Santacesaria, R, Satta, A, Spada, F. R, Barbuto, E, Bozza, C, Grella, G, Romano, G, Sorrentino, S, Sato, Y, Tezuka, I., UCL - SC/PHYS - Département de physique, Çukurova Üniversitesi, T., Toshito, S., Buontempo, A. G., Cocco, N., D'Ambrosio, DE LELLIS, Giovanni, DE ROSA, Gianfranca, F. D., Capua, A., Ereditato, T., Kawamura, M., Messina, P., Migliozzi, Palladino, Vittorio, Strolin, PAOLO EMILIO, V., Tioukov, K., Nakamura, T., Okusawa, U., Dore, P. F., Loverre, L., Ludovici, A., Maslennikov, P., Righini, G., Rosa, R., Santacesaria, A., Satta, F. R., Spada, E., Barbuto, C., Bozza, G., Grella, G., Romano, S., Sorrentino, Y., Sato, and I., Tezuka

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, High Energy Physics::Phenomenology, Hadron, Nuclear physics, SEARCH, High Energy Physics::Experiment, Production (computer science), Nuclear emulsion, Charm (quantum number), Neutrino, Nuclear Experiment, Event (particle physics), Particle Physics - Experiment, Charged current, OSCILLATION
Abstract

We report on a search for associated charm production in neutrino charged-current interactions in the CHORUS experiment, based on the visual observation of charmed-particle decays. The search differs from those carried out so far in which the production of cc has been inferred from measurements of events with two or three muons in the final state, resulting from the decay of charmed hadrons. One event with a double charm-decay topology has been found and a corresponding background of 0.04 events has been evaluated. © 2002 Elsevier Science B.V. All rights reserved. CERN Promotion and Mutual Aid Corporation for Private Schools of Japan Bundesministerium für Bildung und Forschung Grant Foundation: KRF-2001-005-D00006 Israel Science Foundation: 328/94 Instituto Nazionale di Fisica Nucleare Foundation for Fundamental Research on Matter Korean Foundation for Cancer Research We gratefully acknowledge the help and support of the neutrino-beam staff and of the numerous technical collaborators who contributed to the detector construction, operation, emulsion pouring, development and scanning. The experiment has been made possible by grants from the Institut Interuniversitaire des Sciences Nucléaires and the Interuniversitair Instituut voor Kernwetenschappen (Belgium); the Israel Science Foundation (grant 328/94) and the Technion Vice President Fund for the Promotion of Research (Israel); CERN (Geneva, Switzerland); the German Bundesministerium für 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); the Korea Research Foundation Grant (KRF-2001-005-D00006) (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.

Published
2002

19. Measurement of D0 production in neutrino charged-current interactions

Author

Motoaki Miyanishi, A. Artamonov, E. Di Capua, K. Hoshino, R. Tsenov, J. Goldberg, S. Ricciardi, G. De Rosa, M. De Serio, A. Bülte, R. van Dantzig, O. Melzer, R. El-Aidi, S. Kalinin, H. Meinhard, Murat Guler, L. Scotto Lavina, Nicola D'Ambrosio, G. Fiorillo, Osamu Sato, Masahiro Komatsu, U. Dore, T. Okusawa, S. Simone, T. Toshito, A. G. Cocco, M. Serin-Zeyrek, B. Van de Vyver, P. Gorbunov, M. G. Catanesi, P. Strolin, Denis Favart, M. de Jong, Shigeki Aoki, I. Tezuka, Pierre Vilain, E. Pesen, F. R. Spada, U. Kose, K. Niu, S. Buontempo, F. Di Capua, N. Armenise, I Maklioueva, Jan Visschers, D. Frekers, P Righini, B. Saitta, A. Rozanov, Koichi Kodama, E. Arik, K. Winter, V. Khovansky, T. Hara, Ghislain Grégoire, A. Ereditato, N. Bruski, P. Migliozzi, J. W. E. Uiterwijk, S. Sorrentino, L. Ludovici, T. Kawamura, G. Romano, M. Ieva, C. S. Yoon, Michiyuki Chikawa, S. Ogawa, Mihail Chizhov, A. Satta, Cristiano Bozza, M Messina, Rudolf Oldeman, Ivana Hristova, Mathieu Doucet, Y. Sato, R. Santacesaria, Mehmet Zeyrek, G. Rosa, K. Narita, P. F. Loverre, J. Kawada, Ramazan Sever, Gaston Wilquet, Gulsen Onengut, P. Tolun, E. Barbuto, N. Ushida, H. Shibuya, N. Nonaka, V. Shamanov, C. Sirignano, J. Panman, P. Zucchelli, Ilya Tsukerman, M. T. Muciaccia, A. Kayis-Topaksu, Mitsuhiro Nakamura, K. Nakamura, Toshiyuki Nakano, G. De Lellis, I.M. Papadopoulos, D. Kolev, E. Radicioni, K. Niwa, Th. Delbar, C. Pistillo, V Tioukov, A. Marotta, G. Grella, J. S. Song, UCL - SC/PHYS - Département de physique, Çukurova Üniversitesi, Niwa, N., Nonaka, O., Sato, T., Toshito, S., Buontempo, L., Castagneto, A. G., Cocco, N., D'Ambrosio, DE LELLIS, Giovanni, F. D., Capua, DE ROSA, Gianfranca, A., Ereditato, Fiorillo, Giuliana, T., Kawamura, M., Messina, P., Migliozzi, Palladino, Vittorio, P., Strolin, V., Tioukov, K., Nakamura, T., Okusawa, U., Dore, P. F., Loverre, L., Ludovici, P., Righini, G., Rosa, R., Santacesaria, A., Satta, F. R., Spada, E., Barbuto, C., Bozza, G., Grella, G., Romano, C., Sirignano, S., Sorrentino, Y., Sato, and I., Tezuka

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Detector, CHORUS, Neutrino beam, Vertex (geometry), EVENTS, Nuclear physics, OPPOSITE-SIGN DIMUONS, SEARCH, Physique des particules élémentaires, High Energy Physics::Experiment, Nuclear emulsion, QUARKS, Neutrino, Nuclear Experiment, Neutrino oscillation, Particle Physics - Experiment, Charged current
Abstract

During the years 1994-1997, the emulsion target of the CHORUS detector was exposed to the Wide Band Neutrino Beam from the CERN-SPS. About 170 000 neutrino interactions were successfully located in the emulsion. Improvements in the automatic emulsion scanning systems and application of different criteria allowed the sample of located events to be used for studies of charm production. We present a measurement of the production rate of D 0 mesons based on a sample of 25 693 located v μ charged-current (CC) interactions analysed so far. After reconstruction of the event topology in the vertex region, 283 D 0 decays were observed with an estimated background of 9.2 K 0 and Λ decays. The ratio of cross-section of D 0 production and v μ CC interactions is found to be (1.99 ± 0.13(stat.) ± 0.17(syst.)) × 10 -2 at 27 GeV average v μ energy. © 2002 Elsevier Science B. V. All rights reserved., 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2002

20. Observation of Tau Neutrino Interactions

Author

C. Erickson, D. P. Ciampa, T. Patzak, B. Lundberg, A. Kulik, C. Andreopoulos, T. Akdogan, P. Berghaus, J. S. Song, Masahiro Komatsu, Toshiyuki Nakano, R. Rameika, M. Nakamura, N. Nonaka, D. J. Boehnlein, C. Rosenfeld, G. Tzanakos, J. Trammell, J. Wilcox, K. Hoshino, S. Yoshida, J. Sielaff, Osamu Sato, Motoaki Miyanishi, C. S. Yoon, R. A. Sidwell, Jae Chul Yun, Matt W. Graham, S. H. Chung, K. Okada, K. Niwa, M. A. Kubantsev, J. T. Rhee, P. M. Yager, T. Hara, J. Schneps, N. W. Reay, Koichi Kodama, Shigeki Aoki, Ken Heller, Walter Freeman, H. Jiko, T. Kafka, N. Ushida, B. Baller, Reinhard Schwienhorst, Roger Rusack, Jorge G. Morfin, V. Paolone, N. R. Stanton, Niki Saoulidou, W. P. Oliver, Physique Corpusculaire et Cosmologie - Collège de France (PCC), and Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, FOS: Physical sciences, 01 natural sciences, Standard Model, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Tau neutrino, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Measurements of neutrino speed, Nuclear emulsion, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Charged current, Lepton
Abstract

The DONUT experiment has analyzed 203 neutrino interactions recorded in nuclear emulsion targets. A decay search has found evidence of four tau neutrino interactions with an estimated background of 0.34 events. This number is consistent with the Standard Model expectation., 12 pages, 3 figures, PDF

Published
2000
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21. Charged-particle multiplicity and transverse energy measured in S-32 central interactions at 200 GeV per nucleon

Author

H. Tajima, T. Virgili, S. Lusso, M. Kazuno, Paolo Giubellino, Gilbert Poulard, Kimio Niwa, K. Hoshino, A. Di Bartolomeo, S. Simone, D.N. Tovee, L. Ramello, Koichi Kodama, A.C. Breslin, M.S. Sartori, V. Bisi, G. Rosa, G. Grella, M. Nomura, K. Niu, L. Riccati, S. Nakanishi, A. Marzari-Chiesa, S. Di Liberto, N. Ushida, Motoaki Miyanishi, M. J. Esten, M. G. Catanesi, G. Romano, H. Shibuya, Shigeki Aoki, Kazuma Nakazawa, M. T. Muciaccia, Franco Meddi, C. Sgarbi, D.H. Davis, F. Cassol, Massimo Masera, and M. Kobayashi

Subjects
Physics, Heavy-ion collisions, Particle physics, spectra, Nuclear Theory, Observable, Charged particle, Nuclear physics, Transverse plane, Pseudorapidity, Nuclear emulsion, Rapidity, Multiplicity (chemistry), ultrarelativistic energies, Nuclear Experiment, Nucleon, Particle Physics - Experiment
Abstract

Interactions induced by 200 GeV per nucleon32S ions on heavy targets were selected by the HELIOS calorimeters and studied in nuclear emulsions. Global observables, such as charged particle multiplicity and transverse energy, were determined event-by-event. Multiplicity and transverse energy were measured as a function of the pseudorapidity over the large acceptance of the present experiment (0.6≤η≤5.5). A comparison of the experimental data with those provided by the event generators FRITIOF and VENUS shows remarkable differences both in the target spectator region and in the participant region. An attempt is made to interpret these discrepancies in terms of plausible mechanisms, like baryon-pair production or rescattering.

Published
1995

22. The Electromagnetic and Hadronic Diffractive Dissociation of $^{16}O$ Ions

Author

K. Niu, D.H. Davis, S. Simone, G. Baroni, Sartori M, A. Marzari-Chiesa, G. Romano, M. T. Muciaccia, G. Rosa, A.C. Breslin, V. Bisi, S.K.C. Yuen, Colin Wilkin, M. A. Mazzoni, T. Virgili, K. Hoshino, Luciano Ramello, D.N. Tovee, C. Sgarbi, G. Grella, N. Ushida, Franco Meddi, S. Di Liberto, H. Shibuya, M. Kazuno, and Koichi Kodama

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Electromagnetic dissociation, Nuclear emulsions, Nuclear Theory, Hadron, Dissociation (chemistry), Eikonal approximation, Nuclear physics, Excited state, Nuclear emulsion, Atomic physics, Nuclear Experiment, Nucleon, Particle Physics - Experiment, Oxygen-16
Abstract

Events which satisfy the kinematics of p( 16 O,CHep), with low excitation energy in the (CHe) system and a low-energy recoil proton, have been identified in the interactions of 200 GeV/nucleon 16 O ions with nuclear emulsion. An eikonal DWIA estimate of the target A -dependence of strong-interaction diffractive dissociation suggests that, on the basis of these hydrogen data, most of the (CHe) final states, previously ascribed to electromagnetic dissociation on heavy nuclei, might rather be hadronic in character. This contamination is very much less important in the dominant (NH) channel.

Published
1992

23. Electromagnetic dissociation of 200 GeV/N $^{16}$O and $^{32}$S ions in nuclear emulsions

Author

Colin Wilkin, D.H. Davis, Luciano Ramello, K. Hoshino, G. Rosa, Franco Meddi, G. Romano, D.N. Tovee, Paolo Giubellino, G. Baroni, A.C. Breslin, M. T. Muciaccia, S.K.C. Yuen, A. Marzari-Chiesa, H. Shibuya, C. Sgarbi, K. Niu, V. Bisi, S. Di Liberto, G. Grella, S. Simone, S. Dell'Uomo, K. Kodama, M. A. Mazzoni, N. Ushida, M. Kobayashi, and M. Kazuno

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Photon, Ioni ultrarelativistici, Hadron, Virtual particle, Alpha particle, Charged particle, Nuclear physics, electromagnetic dissociation, heavy ions, nuclear emulsion, Neutron, Atomic physics, Nuclear Experiment, Nucleon, Particle Physics - Experiment
Abstract

This work represents the results of an experimental investigation of the electromagnetic dissociation of 200 GeV/nucleon 16 O and 32 S ions in nuclear emulsions. Exclusive channels involving charged fragments have been studied as a function of the energy released, and, assuming a Weizsacker-Williams spectrum of virtual photons, there is a good agreement with results for the (γ, p) processes obtained with real photons. However, the rates found for other processes are larger, in particular for the (γ, α) on both nuclei. The values of the total integrated absorption cross sections are generally larger than those obtained from real photon experiments but the extent of the discrepancy depends strongly upon which photon results are used in the comparison.

Published
1990

24. Experimental details on lifetime measurements of neutrino-produced charmed particles in a tagged emulsion spectrometer

Author

G. Fujioka, C. Yokoyama, D. Pitman, J. F. Martin, P. Sinervo, J.D. Prentice, K. Niu, J. Hebert, T. Hara, S. Y. Bahk, S. Kuramata, S. Errede, S. Lokanathan, H. Kimura, J. Harnois, N. Ushida, H. Okabe, J. Trischuk, H. Shibuya, K. Noshino, P. Davis, Ta Romanowski, Yasuhiro Homma, Y. Yanagisawa, H. Shibata, J. Fisher, Kimio Niwa, J. Yokota, Y. Tsuzuki, N. R. Stanton, Y. Noguchi, K. Moriyama, O. Kusumoto, H. Fukushima, N. W. Reay, Shigeki Tasaka, C. O. Kim, C. J. D. Hébert, M. Teranaka, D. C. Bailey, H. Fuchi, Y. Takahashi, T. S. Yoon, Motoaki Miyanishi, S. Tatsumi, R. A. Sidwell, Jaebeom Park, K. Reibel, J. Song, S. Conetti, M. Gutzwiller, B. McLeod, T. Kondo, and Y. Maeda

Subjects
Physics, Particle physics, Calorimeter (particle physics), Spectrometer, Physics::Instrumentation and Detectors, General Engineering, Short distance, Condensed Matter::Soft Condensed Matter, Nuclear physics, Magnet, Emulsion, High Energy Physics::Experiment, Nuclear emulsion, Fermilab, Neutrino, Nuclear Experiment
Abstract

A new type of hybrid appaatus, which consisted of an emulsion target and a magnet spectrometer, was successfully used in an experiment to measure lifetimes of charmed particles produced by the wide-band neutrino beam from 350 GeV protons at Fermilab. The emulsion target was essential to find short distance decay vertices andthe counter spectrometer was used both to localize the neutrino events in the emulsion and also to identify the particles from weak decays and those produced in the neutrino interactions. Newly introduced emulsion techniques such as the changeable sheet as a low background interface to couple the emulsion target with the counter spectrometer, and the single track followback method to locate interaction and decay vertices in the emulsion, were proved to be very powerful. Details of the experimental apparatus and of the method of analysis employed are described.

Published
1984
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25. Direct observations of the decay of beauty particles into charm particles

Author

V. Bisi, I. Tesuka, K. Chiba, Motoaki Miyanishi, S. Natali, G. Romano, S. Dell'Uomo, V. Alpe, M. Ohashi, F. Piuz, F.F. Heymann, R. Arnold, A. Marzari-Chiesa, Y. Maeda, F. Ruggieri, J. H. Bartley, Franco Meddi, M. Hazama, Shigeki Aoki, C. Sgarbi, Kimio Niwa, A.C. Breslin, B.G. Duff, C. Gerke, G. Baroni, Y. Kodama, P. T. Trent, Y. Yanagisawa, K. Niu, Salvatore Nuzzo, G. Bertrand-Coremans, W. Bonnelly, Gilbert Poulard, Y. Tsuneoka, Yasuhiro Tomita, L. Riccati, M. A. Mazzoni, E. Chesi, M. Kazuno, M. Nakamura, Shigeki Tasaka, Luciano Ramello, Yoshihiro Sato, G. Rosa, M.J. Esten, N. Ushida, Giovanni Carboni, M. T. Muciaccia, Kazuma Nakazawa, A. Montwill, M. Barth, O. Yamakawa, G.J. Lush, Y. Isokane, D.H. Davis, Dn Tovee, G. Crosetti, M. Coupland, J. P. Albanese, G.S. Cook, R. Roosen, P. Musset, D.C. Imrie, K. Hoshino, H. Shibuya, S. Di Liberto, D. Gamba, H. Sasaki, S. Simone, D. Bertrand, H. Sletten, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Physics::Instrumentation and Detectors, media_common.quotation_subject, Direct observation, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Nuclear physics, Particle decay, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], nuclear emulsion, Muon spectrometer, Beauty, Physique des particules élémentaires, caer sps, beauty particle decay, High Energy Physics::Experiment, Nuclear emulsion, Charm (quantum number), Nuclear Experiment, Event (particle physics), Particle Physics - Experiment, media_common
Abstract

The associated production of a pair of beauty particles B- and B0 by a 350 GeV π- interaction has been observed in an emulsion target inserted in an array of silicon microstrip detectors. Both beauty particles decay into charm particles, both of which are also observed to decay in the emulsion. Two negative muons were identified and their momenta measured in a large muon spectrometer. One muon has a pT of 1.9 GeV/c and is associated with a beauty particle decay. The other, with a pT of 0.45 GeV/c is associated with a charm particle decay. The flight times of the two beauty particles are respectively (0.8 ± 0.1) × 10-13 s and (5+2 -1) × 10-13 s. Alternative interpretations of this event have negligible probability, 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1985
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26. Technical aspects – design, scanning and energy measurement in small emulsion chambers

Author

S. Tasaka, Y. Maeda, K. Hoshino, H. Shibuya, H. Fuchi, N. Ushida, Y. Yanagisawa, K. Niwa, S. Kuramata, and K. Niu

Subjects
Physics, Physics::Instrumentation and Detectors, business.industry, Scattering, Detector, Particle detector, Quantitative Biology::Cell Behavior, Condensed Matter::Soft Condensed Matter, Nuclear physics, Optics, Stack (abstract data type), Emulsion, Measuring instrument, Particle, Nuclear emulsion, Nuclear Experiment, business
Abstract

Technical aspects of small emulsion chamber are discussed. Emulsion chamber is a detector which consists of nuclear emulsion plates and other light or heavy material plates. While a pure emulsion stack is likened to a micro bubble chamber, it could be compared to a complex counter detector assembly with super high spatial resolving power. It is possible to measure particle momenta by relative scattering method and trace back γ ray cascades to vertices a few centimeters away. Charged secondary tracks could be examined for sudden changes in direction several centimeters from production vertices. ’’Invention’’ of the emulsion chamber enabled one to extend the power of pure emulsions to study very high energy interactions to tens of TeV, and it opend a new windnow for search of short‐lived particles.

Published
1979
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27. A Hybrid Experiment To Search For Beauty Particles

Author

J. H. Bartley, K. Niu, H. Tajima, C. Gerke, G.J. Lush, Y. Isokane, A. Marzari-Chiesa, G. Martellotti, Kimio Niwa, Salvatore Nuzzo, E. Chesi, Gilbert Poulard, Giovanni Carboni, B.G. Duff, O. Yamakawa, D.H. Davis, M. Barth, M. G. Catanesi, Paolo Giubellino, G. Rosa, P. Musset, Y. Yanagisawa, G. Bertrand-Coremans, Y. Nakamura, G. Marini, Shigeki Aoki, K. Kodama, R. Arnold, A.M. Cecchetti, Y. Maeda, D. Bertrand, Shigeki Tasaka, Luciano Ramello, Yoshihiro Sato, K. Chiba, G. Baroni, M. Hazama, P. T. Trent, S. Dell'Uomo, N. Ushida, A. Montwill, F. Minakawa, F. Ruggieri, A.C. Breslin, W. Donnelly, H. Sletten, I. Tezuka, M. T. Muciaccia, Makoto Kobayashi, Y. Tsuneoka, L. Riccati, M. Ohashi, A. Nigro, Franco Meddi, F. Piuz, C. Sgarbi, Gianni Penso, G. Romano, Yasuhiro Tomita, P. Pistilli, S. Watanabe, D.C. Imrie, K. Hoshino, H. Sasaki, D.N. Tovee, V. Bisi, M.A. Mazzoni, Motoaki Miyanishi, S. Natali, T. Kaway, A. Manfredini, A. Sciubba, M. J. Esten, S. Simone, F.F. Heymann, M. De Vincenzi, H. Shibuya, S. Di Liberto, D. Gamba, M. Nakamura, A. Frenkel, M. Kazuno, M. Coupland, Kazuma Nakazawa, R. Roosen, Institut de Recherches Subatomiques (IReS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Large Hadron Collider, Spectrometer, Physics::Instrumentation and Detectors, WA75, beauty particle detection, experimental apparatus, Particle identification, Vertex (geometry), Nuclear physics, Transverse plane, Hodoscope, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear emulsion, High Energy Physics::Experiment, Detectors and Experimental Techniques, Nuclear Experiment, Instrumentation
Abstract

We give here a detailed description of experiment WA75, which was performed at CERN to search for beauty particles. Events containing at least one muon with a high momentum transverse to the beam direction were selected; then the primary interactions and decay vertices, located in stacks of nuclear research emulsions, were examined and analysed. The various parts of the apparatus are described and the off-line analysis and search in emulsion are discussed. An estimate is made of the sensitivity of the experiment to beauty- and charmed-particle production., 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1989

28. Measurement of charm production in neutrino charged-current interactions

Author

Kayis Topaksu, A., Onengut, G., Dantzig, R. V., Jong, M. D., Van Dantzig, R., De Jong, M., Oldeman, P. G. C., Oldeman, R. G. C., Guler, M., Kose, U., Tolun, P., Catanesi, M. G., Muciaccia, M. T., Winter, K., B. V., De, Van De Vyver, B., Vilain, P., Wilquet, G., Saitta, B., Capua, E. D., Di Capua, E., Ogawa, S., Shibuya, H., Hristova, I. R., Kawamura, T., Kolev, D., Meinhard, H., Panman, J., Rozanov, A., Tsenov, R., Uiterwijk, J. W. E., Zucchelli, P., Goldbergll, Goldberg, J., Chikawa, M., Song, J. S., Yoon, C. S., Kodama, K., Ushida, N., Aoki, S., Hara, T., Delbar, T., Favart, D., Gregoire, G., Kalinin, S., Makhlioueva, I., Artamonov, A., Gorbunov, P., Khovansky, V., Shamanov, V., Tsukerman, I., Bruski, N., Frekers, D., Hoshino, K., Kawada, J., Komatsu, M., Miyanishi, M., Nakamura, M., Nakano, T., Narita, K., Niu, K., Niwa, K., Nonaka, N., Sato, O., Toshito, T., Buontempo, S., Cocco, A. G., D'Ambrosio, N., Lellis, G. D., De Lellis, G., De Rosa, G., Di Capua, F., Fiorillo, G., Marotta, A., Messina, M., Migliozzi, P., Lavina, L. S., Scotto Lavina, L., Strolin, P., Tioukov, V., Okusawa, T., Dore, U., Loverre, Pier Ferruccio, Ludovici, L., Rosa, Giovanni, Capua, F. D., Dore, Ubaldo, Loverre, P. F., Rosa, G., Santacesaria, R., Satta, A., Spada, F. R., Barbuto, E., Bozza, C., Grella, G., Romano, G., Sirignano, C., Sorrentino, S., Sato, Y., Tezuka, I., Çukurova Üniversitesi, A., Kayis Topaksu, G., Önengüt, R., van Dantzig, M., de Jong, R. G. C., Oldeman, M., Güler, U., Köse, 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., Grégoire, S., Kalinin, I., Makhlioueva, A., Artamonov, P., Gorbunov, V., Khovansky, V., Shamanov, I., Tsukerman, N., Bruski, D., Freker, 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, DE LELLIS, Giovanni, DE ROSA, Gianfranca, DI CAPUA, Francesco, Fiorillo, Giuliana, A., Marotta, M., Messina, P., Migliozzi, L., Scotto Lavina, Strolin, PAOLO EMILIO, 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, and I., Tezuka

Subjects
Physics, Particle physics, Muon, Large Hadron Collider, Physics::Instrumentation and Detectors, Hadron, High Energy Physics::Phenomenology, General Physics and Astronomy, FOS: Physical sciences, Hadronization, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Nuclear emulsion, High Energy Physics::Experiment, Charm (quantum number), Neutrino, Nuclear Experiment, Charged current, Particle Physics - Experiment
Abstract

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 100000 charged-current 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. 2013 charged-current 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 charged-current cross-section is measured to be sigma(nu_mu N -> mu- C X)/sigma(CC) = (5.75 +-0.32 stat +-0.30 syst)%. The charm production cross-section as a function of the 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 %): f_Dzero = 43.7+-4.5, f_Lambda_c^plus = 19.2+-4.2, f_Dplus = 25.3+-4.2, and f_D_splus = 11.8+-4.7., 16 pages, 5 figures

Published
2011

29. The OPERA experiment in the CERN to Gran Sasso neutrino beam

Author

Acquafredda, R., A, Adam, 1 T., Agafonova, b. N., Alvarez Sanchez, c. P., Ambrosio, d. M., Anokhina, a. A., Aoki, e. S., Ariga, f. A., Ariga, g. T., Arrabito, h. L., Aufranc, i. C., Autiero, i. D., Badertscher, i. A., Bagulya, j. A., Baussan, k. E., Bergnoli, b. A., L, Bersani Greggio, 2 F., Bertolin, m. A., Besnier, l. M., N, Biar ´e, 3 D., Bick, n. D., Blin, o. S., Borer, p. K., Boucrot, g. J., Boutigny, p. D., Boyarkin, 4 V., Bozza, c. C., Brugi `ere, q. T., Brugnera, i. R., R, Brunetti, l. G., S, Buontempo, t. S., Campagne, a. J. E., Carlus, p. B., Carrara, i. E., R, L, Cazes, 5 A., Chaussard, u. L., Chernyavsky, i. M., Chiarella, k. V., Chon Sen, u. N., Chukanov, b. A., Ciesielski, a. R., Consiglio, l. L., Cozzi, t. M., D’Amato, s. G., Dal Corso, q. F., D’Ambrosio, l. N., Damet, v. J., de La Taille, 6 C., De Lellis, p. G., W, A, D´eclais, 7 Y., Descombes, i. T., I, De Serio, 8 M., Di Capua, x. F., Di Ferdinando, a. D., Di Giovanni, t. A., Di Marco, y. N., Di Troia, y. C., Dick, u. N., Dmitrievski, b. S., Dominjon, z. A., Dracos, i. M., Duchesneau, b. D., Dulach, n. B., Dusini, u. S., Ebert, l. J., Efthymiopoulos, o. I., Egorov, d. O., Elsener, aa K., Enikeev, d. R., Ereditato, c. A., Esposito, g. L. S., Fanin, v. C., Favier, l. J., Felici, n. G., Ferber, u. T., Fini, o. R., Fournier, x. L., Franceschi, n. A., Frekers, u. D., Fukuda, ab T., Fukushima, h. C., Galkin, ac V. I., Galkin, e. V. A., Gallet, ad R., Gardien, n. S., Garfagnini, i. A., Gaudiot, l. G., Giacomelli, b. G., Giorgini, t. M., Girerd, t. C., Goellnitz, i. C., Goeltzenlichter, o. T., Goldberg, b. J., Golubkov, ae D., Gornushkin, aa Y., Grapton, z. J. N., Grella, b. G., Grianti, q. F., Gschwendtner, m. E., Guerin, d. C., Guler, i. M., Gustavino, a. f. C., Guyonnet, v. J. L., Hagner, b. C., Hamane, o. T., Hara, 9 T., Hauger, f. M., Hess, g. M., Hierholzer, g. M., Hoshino, ag K., Ieva, h. M., Incurvati, x. M., Jakovcic, u. K., Janicsko Csathy, ah J., Janutta, g. B., Jollet, o. C., Juget, b. F., Kazuyama, g. M., Kim, h. S. H., Khovansky, 10 N., Kimura, z. M., Klicek, ac B., Knuesel, ah J., Kodama, g. K., Kolev, a. j. D., Komatsu, M., Kose, h. U., a. f., Krasnoperov, 11 A., Kreslo, z. I., Krumstein, g. Z., Kutsenov, z. V. V., Kuznetsov, c. V. A., Laktineh, c. I., Lavy, i. M., Lazzaro, 12 C., j. T. D., Le, Le Flour, b. T., Lenkeit, n. J., Lewis, o. J., Lieunard, d. S., Ljubicic, n. A., Longhin, ah A., Lutter, r. G., Malgin, g. A., Manai, c. K., Mandrioli, i. G., Marotta, t. A., Marteau, a. J., Martin Chassard, i. G., Matveev, p. V., Mauri, c. N., Meddahi, t. M., Meisel, d. F., Meregaglia, g. A., Meschini, b. A., Messina, v. M., Migliozzi, g. P., Monacelli, a. P., Monteiro, y. I., Moreau, n. F., Morishima, 13 K., Moser, h. U., Muciaccia, g. M. T., Mugnier, x. P., Naganawa, n. N., Nakamura, h. M., Nakano, h. T., Napolitano, h. T., Nikitina, u. V., Niwa, e. K., Nonoyama, h. Y., Nozdrin, h. A., Ogawa, z. S., Olchevski, ac A., Orlandi, z. D., Orlova, v. G., Osedlo, k. V., Ossetski, e. D., Paniccia, ad M., Paoloni, u. A., Park, u. B. D., Park, h. I. G., Pastore, ai A., Patrizii, x. L., Pellegrino, t. L., Pennacchio, u. E., Pessard, i. H., Pilipenko, n. V., Pistillo, ab C., Polukhina, g. N., Pozzato, k. M., Pretzl, t. K., Publichenko, g. P., Pupilli, e. F., Raux, y. L., Repellin, p. J. P., Rescigno, p. R., Rizhikov, q. D., Roganova, ad T., Romano, e. G., Rosa, q. G., Rostovtseva, am I., Rubbia, aa A., Russo, j. A., W, Ryasny, a. V., Ryazhskaya, c. O., Sadovski, c. A., Sanelli, z. C., Sato, u. O., Sato, h. Y., Saveliev, an V., Sazhina, ad G., Schembri, e. A., Schmidt Parzefall, am W., Schroeder, o. H., Sch¨utz, ag H. U., Schuler, g. J., Scotto Lavina, b. L., Serrano, a. J., Shibuya, d. H., Simone, ac S., Sioli, x. M., Sirignano, Chiara, Sirri, q. G., Song, t. J. S., Spinetti, ai M., Stanco, u. L., Starkov, r. N., Stipcevic, k. M., Strauss, ah T., Strolin, j. P., Sugonyaev, a. V., Takahashi, 14 S., Talochkin, h. V., Tenti, c. M., Tereschenko, t. V., Terranova, z. F., U, Tezuka, 15 I., Tioukov, an V., Tolun, a. P., Tsarev, a. f. V., Tsenov, k. R., Tufanli, ak S., Ugolino, a. f. U., Ushida, a. N., Van Beek, a. j. G., Verguilov, ao V., Viant, ak T., Vilain, j. P., Vladimirov, ao M., Votano, k. L., Vuilleumier, u. J. L., Waelchli, g. T., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), OPERA, Acquafredda, R, Adam, T, Agafonova, N, Sanchez, P, Ambrosio, M, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Arrabito, L, Aufranc, C, Autiero, D, Badertscher, A, Bagulya, A, Baussan, E, Bergnoli, A, Greggio, F, Bertolin, A, Besnier, M, Biaré, D, Bick, D, Blin, S, Borer, K, Boucrot, J, Boutigny, D, Boyarkin, V, Bozza, C, Brugière, T, Brugnera, R, Brunetti, G, Buontempo, S, Campagne, J, Carlus, B, Carrara, E, Cazes, A, Chaussard, L, Chernyavsky, M, Chiarella, V, Chon Sen, N, Chukanov, A, Ciesielski, R, Consiglio, L, Cozzi, M, D'Amato, G, Corso, F, D'Ambrosio, N, Damet, J, Taille, C, Lellis, G, Déclais, Y, Descombes, T, Serio, M, Capua, F, Ferdinando, D, Giovanni, A, Marco, N, Troia, C, Dick, N, Dmitrievski, S, Dominjon, A, Dracos, M, Duchesneau, D, Dulach, B, Dusini, S, Ebert, J, Efthymiopoulos, I, Egorov, O, Elsener, K, Enikeev, R, Ereditato, A, Esposito, L, Fanin, C, Favier, J, Felici, G, Ferber, T, Fini, R, Fournier, L, Franceschi, A, Frekers, D, Fukuda, T, Fukushima, C, Galkin, V, Gallet, R, Gardien, S, Garfagnini, A, Gaudiot, G, Giacomelli, G, Giorgini, M, Girerd, C, Goellnitz, C, Goeltzenlichter, T, Goldberg, J, Golubkov, D, Gornushkin, Y, Grapton, J, Grella, G, Grianti, F, Gschwendtner, E, Guerin, C, Guler, M, Gustavino, C, Guyonnet, J, Hagner, C, Hamane, T, Hara, T, Hauger, M, Hess, M, Hierholzer, M, Hoshino, K, Ieva, M, Incurvati, M, Jakovcic, K, Csathy, J, Janutta, B, Jollet, C, Juget, F, Kazuyama, M, Kim, S, Khovansky, N, Kimura, M, Klicek, B, Knuesel, J, Kodama, K, Kolev, D, Komatsu, M, Kose, U, Krasnoperov, A, Kreslo, I, Krumstein, Z, Kutsenov, V, Kuznetsov, V, Laktineh, I, Lavy, M, Lazzaro, C, Le, T, Flour, T, Lenkeit, J, Lewis, J, Lieunard, S, Ljubicic, A, Longhin, A, Lutter, G, Malgin, A, Manai, K, Mandrioli, G, Marotta, A, Marteau, J, Martin Chassard, G, Matveev, V, Mauri, N, Meddahi, M, Meisel, F, Meregaglia, A, Meschini, A, Messina, M, Migliozzi, P, Monacelli, P, Monteiro, I, Moreau, F, Morishima, K, Moser, U, Muciaccia, M, Mugnier, P, Naganawa, N, Nakamura, M, Nakano, T, Napolitano, T, Nikitina, V, Niwa, K, Nonoyama, Y, Nozdrin, A, Ogawa, S, Olchevski, A, Orlandi, D, Orlova, G, Osedlo, V, Ossetski, D, Paniccia, M, Paoloni, A, Park, B, Park, I, Pastore, A, Patrizii, L, Pellegrino, L, Pennacchio, E, Pessard, H, Pilipenko, V, Pistillo, C, Polukhina, N, Pozzato, M, Pretzl, K, Publichenko, P, Pupilli, F, Raux, L, Repellin, J, Rescigno, R, Rizhikov, D, Roganova, T, Romano, G, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryasny, V, Ryazhskaya, O, Sadovski, A, Sanelli, C, Sato, O, Sato, Y, Saveliev, V, Sazhina, G, Schembri, A, Parzefall, W, Schroeder, H, Schütz, H, Schuler, J, Lavina, L, Serrano, J, Shibuya, H, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Song, J, Spinetti, M, Stanco, L, Starkov, N, Stipcevic, M, Strauss, T, Strolin, P, Sugonyaev, V, Takahashi, S, Talochkin, V, Tenti, M, Tereschenko, V, Terranova, F, Tezuka, I, Tioukov, V, Tolun, P, Tsarev, V, Tsenov, R, Tufanli, S, Ugolino, U, Ushida, N, Beek, G, Verguilov, V, Viant, T, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Waelchli, T, Weber, M, Wilquet, G, Wonsak, B, Wurtz, J, Yakushev, V, Yoon, C, Zaitsev, Y, Zghiche, A, Zimmermann, R, Sanchez, P. Alvarez, Greggio, F. Bersani, Campagne, J. E, Corso, F. Dal, Taille, C. de La, Lellis, G. De, Serio, M. De, DI CAPUA, Francesco, Ferdinando, D. Di, Giovanni, A. Di, Marco, N. Di, Troia, C. Di, Esposito, L. S, Galkin, V. I, Galkin, V. A, Grapton, J. N, Guyonnet, J. L, Csathy, J. Janicsko, Kim, S. H, Kutsenov, V. V, Kuznetsov, V. A, Le, T. D, Flour, T. Le, Muciaccia, M. T, Park, B. D, Park, I. G, Repellin, J. P, Parzefall, W. Schmidt, Schütz, H. U, Lavina, L. Scotto, Song, J. S, Beek, G. Van, Vuilleumier, J. L, Yoon, C. S, Zimmermann, R., R. ACQUAFREDDA, T. ADAM, N. AGAFONOVA, P. ALVAREZ SANCHEZ, M. AMBROSIO, A. ANOKHINA, S. AOKI, A. ARIGA, T. ARIGA, L. ARRABITO, C. AUFRANC, D. AUTIERO, A. BADERTSCHER, A. BAGULYA, E. BAUSSAN, A. BERGNOLI, F. BERSANI GREGGIO, A. BERTOLIN, M. BESNIER, D. BIARÉ, D. BICK, S. BLIN, K. BORER, J. BOUCROT, D. BOUTIGNY, V. BOYARKIN, C. BOZZA, T. BRUGIÈRE, R. BRUGNERA, G. BRUNETTI, S. BUONTEMPO, J.E. CAMPAGNE, B. CARLUS, E. CARRARA, A. CAZES, L. CHAUSSARD, M. CHERNYAVSKY, V. CHIARELLA, N. CHON-SEN, A. CHUKANOV, R. CIESIELSKI, L. CONSIGLIO, M. COZZI, G. D’AMATO, F. DAL CORSO, N. D’AMBROSIO, J. DAMET, C. DE LA TAILLE, G. DE LELLIS, Y. D´ECLAIS, T. DESCOMBES, M. DE SERIO, F. DI CAPUA, D. DI FERDINANDO, A. DI GIOVANNI, N. DI MARCO, C. DI TROIA, N. DICK, S. DMITRIEVSKI, A. DOMINJON, M. DRACOS, D. DUCHESNEAU, B. DULACH, S. DUSINI, J. EBERT, I. EFTHYMIOPOULOS, O. EGOROV, K. ELSENER, R. ENIKEEV, A. EREDITATO, L. S. ESPOSITO, C. FANIN, J. FAVIER, G. FELICI, T. FERBER, R. FINI, L. FOURNIER, A. FRANCESCHI, D. FREKERS, T. FUKUDA, C. FUKUSHIMA, V.I. GALKIN, V.A. GALKIN, R. GALLET, S. GARDIEN, A. GARFAGNINI, G. GAUDIOT, G. GIACOMELLI, M. GIORGINI, C. GIRERD, C. GOELLNITZ, T. GOELTZENLICHTER, J. GOLDBERG, D. GOLUBKOV, Y. GORNUSHKIN, J.-N. GRAPTON, G. GRELLA, F. GRIANTI, E. GSCHWENDTNER, C. GUERIN, M. GULER, C. GUSTAVINO, J.-L. GUYONNET, C. HAGNER, T. HAMANE, T. HARA, M. HAUGER, M. HESS, M. HIERHOLZER, K. HOSHINO, M. IEVA, M. INCURVATI, K. JAKOVCIC, J. JANICSKO CSATHY, B. JANUTTA, C. JOLLET, F. JUGET, M. KAZUYAMA, S.H. KIM, N. KHOVANSKY, M. KIMURA, B. KLICEK, J. KNUESEL, K. KODAMA, D. KOLEV, M. KOMATSU, U. KOSE, A. KRASNOPEROV, I. KRESLO, Z. KRUMSTEIN, V.V. KUTSENOV, V.A. KUZNETSOV, I. LAKTINEH, M. LAVY, C. LAZZARO, T.D. LE, T. LE FLOUR, J. LENKEIT, J. LEWIS, S. LIEUNARD, A. LJUBICIC, A. LONGHIN, G. LUTTER, A. MALGIN, K. MANAI, G. MANDRIOLI, A. MAROTTA, J. MARTEAU, G. MARTIN-CHASSARD, V. MATVEEV, N. MAURI, M. MEDDAHI, F. MEISEL, A. MEREGAGLIA, A. MESCHINI, M. MESSINA, P. MIGLIOZZI, P. MONACELLI, I. MONTEIRO, F. MOREAU, K. MORISHIMA, U. MOSER, M.T. MUCIACCIA, P. MUGNIER, N. NAGANAWA, M. NAKAMURA, T. NAKANO, T. NAPOLITANO, V. NIKITINA, K. NIWA, Y. NONOYAMA, A. NOZDRIN, S. OGAWA, A. OLCHEVSKI, D. ORLANDI, G. ORLOVA, V. OSEDLO, D. OSSETSKI, M. PANICCIA, A. PAOLONI, B. D PARK, I.G. PARK, A. PASTORE, L. PATRIZII, L. PELLEGRINO, E. PENNACCHIO, H. PESSARD, V. PILIPENKO, C. PISTILLO, N. POLUKHINA, M. POZZATO, K. PRETZL, P. PUBLICHENKO, F. PUPILLI, L. RAUX, J.P. REPELLIN, R. RESCIGNO, D. RIZHIKOV, T. ROGANOVA, G. ROMANO, G. ROSA, I. ROSTOVTSEVA, A. RUBBIA, J A. RUSSO, V. RYASNY, O. RYAZHSKAYA, A. SADOVSKI, C. SANELLI, O. SATO, Y. SATO, V. SAVELIEV, G. SAZHINA, A. SCHEMBRI, W. SCHMIDT PARZEFALL, H. SCHROEDER, H.U. SCH¨UTZ, J. SCHULER, L. SCOTTO LAVINA, J. SERRANO, H. SHIBUYA, S. SIMONE, M. SIOLI, C. SIRIGNANO, G. SIRRI, J.S. SONG, M. SPINETTI, L. STANCO, N. STARKOV, M. STIPCEVIC, T. STRAUSS, P. STROLIN, V. SUGONYAEV, S. TAKAHASHI, V. TALOCHKIN, M. TENTI, V. TERESCHENKO, F. TERRANOVA, I. TEZUKA, V. TIOUKOV, P. TOLUN, V. TSAREV, R. TSENOV, S. TUFANLI, U. UGOLINO, N. USHIDA, G. VAN BEEK, V. VERGUILOV, T. VIANT, P. VILAIN, M. VLADIMIROV, L. VOTANO, J.L. VUILLEUMIER, T. WAELCHLI, M. WEBER, G. WILQUET, B. WONSAK, J. WURTZ, V. YAKUSHEV, C.S. YOON, Y. ZAITSEV, A. ZGHICHEN, R. ZIMMERMANN, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Particle physics, [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], NEUTRINO OSCILLATIONS, FUNDAMENTAL PHYSICS, Physics::Instrumentation and Detectors, 7. Clean energy, 01 natural sciences, Nuclear physics, neutrino, Particle tracking detectors, 0103 physical sciences, Nuclear emulsion, Detectors and Experimental Techniques, 010306 general physics, Neutrino oscillation, Instrumentation, Mathematical Physics, ICARUS, Physics, Large Hadron Collider, Spectrometers, Large detector systems for particle and astroparticle physics, 010308 nuclear & particles physics, Hybrid detector, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Detector, Hybrid detectors, NEUTRINO DETECTORS, Particle tracking detector, FIS/01 - FISICA SPERIMENTALE, Large detector systems for particle and astroparticle physic, Physique des particules élémentaires, PARTICLE PHYSICS, High Energy Physics::Experiment, hybrid detectors, particle tracking detectors, large detector systems for particle and astroparticle physics, spectrometers, Supermodule, Neutrino, Lepton
Abstract

The OPERA neutrino oscillation experiment has been designed to prove the appearance of ντ in a nearly pure νμ beam (CNGS) produced at CERN and detected in the underground Hall C of the Gran Sasso Laboratory, 730 km away from the source. In OPERA, τ leptons resulting from the interaction of ντ are produced in target units called bricks made of nuclear emulsion films interleaved with lead plates. The OPERA target contains 150000 of such bricks, for a total mass of 1.25 kton, arranged into walls interleaved with plastic scintillator strips. The detector is split into two identical supermodules, each supermodule containing a target section followed by a magnetic spectrometer for momentum and charge measurement of penetrating particles. Real time information from the scintillators and the spectrometers provide the identification of the bricks where the neutrino interactions occurred. The candidate bricks are extracted from the walls and, after X-ray marking and an exposure to cosmic rays for alignment, their emulsion films are developed and sent to the emulsion scanning laboratories to perform the accurate scan of the event. In this paper, we review the design and construction of the detector and of its related infrastructures, and report on some technical performances of the various components. The construction of the detector started in 2003 and it was completed in Summer 2008. The experiment is presently in the data taking phase. The whole sequence of operations has proven to be successful, from triggering to brick selection, development, scanning and event analysis. © 2009 IOP Publishing Ltd and SISSA., 0, P04018, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2009
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