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CERN Accelerating science

Article
Report number arXiv:1912.11012
Title First observation of a tau neutrino charged current interaction with charm production in the Opera experiment
Author(s)

Agafonova, N. (Moscow, INR ; SINP, Moscow) ; Aleksandrov, A. (INFN, Naples) ; Anokhina, A. (SINP, Moscow) ; Aoki, S. (Kobe U.) ; Ariga, A. (U. Bern, AEC) ; Ariga, T. (U. Bern, AEC ; Kyushu U.) ; Bertolin, A. (INFN, Padua) ; Bozza, C. (Salerno U. ; INFN, Salerno) ; Brugnera, R. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Buonaura, A. (INFN, Naples ; Naples U.) ; Buontempo, S. (INFN, Naples) ; Chernyavskiy, M. (Lebedev Inst.) ; Chukanov, A. (Dubna, JINR) ; Consiglio, L. (INFN, Naples) ; D'Ambrosio, N. (Gran Sasso) ; De Lellis, G. (INFN, Naples ; Naples U. ; CERN) ; De Serio, M. (Bari U. ; INFN, Bari) ; del Amo Sanchez, P. (Annecy, LAPP) ; Di Crescenzo, A. (INFN, Naples ; Naples U.) ; Di Ferdinando, D. (INFN, Bologna) ; Di Marco, N. (Gran Sasso) ; Dmitrievski, S. (Dubna, JINR) ; Dracos, M. (Strasbourg, IPHC) ; Duchesneau, D. (Annecy, LAPP) ; Dusini, S. (INFN, Padua) ; Dzhatdoev, T. (SINP, Moscow) ; Ebert, J. (Hamburg U.) ; Ereditato, A. (U. Bern, AEC) ; Fini, R.A. (INFN, Bari) ; Fornari, F. (INFN, Bologna ; U. Bologna, DIFA) ; Fukuda, T. (Nagoya U.) ; Galati, G. (INFN, Naples ; Naples U.) ; Garfagnini, A. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Gentile, V. (INFN, Naples ; Natl. U. Sci. Tech., Moscow) ; Goldberg, J. (Technion) ; Gorbunov, S. (Lebedev Inst.) ; Gornushkin, Y. (Dubna, JINR) ; Grella, G. (INFN, Salerno ; Salerno U.) ; Guler, A.M. (Middle East Tech. U., Ankara) ; Gustavino, C. (INFN, Rome) ; Hagner, C. (Hamburg U.) ; Hara, T. (Kobe U.) ; Hayakawa, T. (Nagoya U.) ; Hollnagel, A. (Hamburg U.) ; Ishiguro, K. (Nagoya U.) ; Iuliano, A. (INFN, Naples ; Naples U.) ; Jakovcic, K. (Boskovic Inst., Zagreb) ; Jollet, C. (Strasbourg, IPHC) ; Kamiscioglu, C. (Middle East Tech. U., Ankara ; Ankara U.) ; Kamiscioglu, M. (Middle East Tech. U., Ankara) ; Kim, S.H. (Gyeongsang Natl. U.) ; Kitagawa, N. (Nagoya U.) ; Klicek, B. (Boskovic Inst., Zagreb) ; Kodama, K. (Aichi U. of Education) ; Komatsu, M. (Nagoya U.) ; Kose, U. (INFN, Padua) ; Kreslo, I. (U. Bern, AEC) ; Laudisio, F. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Lauria, A. (INFN, Naples ; Naples U.) ; Longhin, A. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Loverre, P. (INFN, Rome) ; Malgin, A. (Moscow, INR) ; Malenica, M. (Boskovic Inst., Zagreb) ; Mandrioli, G. (INFN, Bologna) ; Matsuo, T. (Toho U.) ; Matveev, V. (Moscow, INR) ; Mauri, N. (INFN, Bologna ; U. Bologna, DIFA) ; Medinaceli, E. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Meregaglia, A. (Strasbourg, IPHC) ; Mikado, S. (Nihon U., Narashino) ; Miyanishi, M. (Nagoya U.) ; Mizutani, F. (Kobe U.) ; Monacelli, P. (INFN, Rome) ; Montesi, M.C. (INFN, Naples ; Naples U.) ; Morishima, K. (Nagoya U.) ; Muciaccia, M.T. (Bari U. ; INFN, Bari) ; Naganawa, N. (Nagoya U.) ; Naka, T. (Nagoya U.) ; Nakamura, M. (Nagoya U.) ; Nakano, T. (Nagoya U.) ; Niwa, K. (Nagoya U.) ; Okateva, N. (Lebedev Inst.) ; Ogawa, S. (Toho U.) ; Ozaki, K. (Kobe U.) ; Paoloni, A. (LNF, Dafne Light) ; Paparella, L. (Bari U. ; INFN, Bari) ; Park, B.D. (Gyeongsang Natl. U.) ; Pasqualini, L. (INFN, Bologna ; U. Bologna, DIFA) ; Pastore, A. (Bari U. ; INFN, Bari) ; Patrizii, L. (INFN, Bologna) ; Pessard, H. (Annecy, LAPP) ; Podgrudkov, D. (SINP, Moscow) ; Polukhina, N. (Lebedev Inst. ; Moscow Phys. Eng. Inst.) ; Pozzato, M. (INFN, Bologna ; U. Bologna, DIFA) ; Pupilli, F. (INFN, Padua) ; Roda, M. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Roganova, T. (SINP, Moscow) ; Rokujo, H. (Nagoya U.) ; Rosa, G. (INFN, Rome) ; Ryazhskaya, O. (Moscow, INR) ; Sato, O. (Nagoya U.) ; Schembri, A. (Gran Sasso) ; Shakirianova, I. (Moscow, INR) ; Shchedrina, T. (Lebedev Inst.) ; Shibuya, H. (Toho U.) ; Shibayama, E. (Kobe U.) ; Shiraishi, T. (Nagoya U.) ; Simone, S. (Bari U. ; INFN, Bari) ; Sirignano, C. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Sirri, G. (INFN, Bologna) ; Sotnikov, A. (Dubna, JINR) ; Spinetti, M. (LNF, Dafne Light) ; Stanco, L. (INFN, Padua) ; Starkov, N. (Lebedev Inst.) ; Stellacci, S.M. (INFN, Salerno ; Salerno U.) ; Stipcevic, M. (Boskovic Inst., Zagreb) ; Strolin, P. (INFN, Naples ; Naples U.) ; Takahashi, S. (Kobe U.) ; Tenti, M. (INFN, Bologna) ; Terranova, F. (Milan Bicocca U.) ; Tioukov, V. (INFN, Naples) ; Vasina, S. (Dubna, JINR) ; Vilain, P. (Brussels U., IIHE) ; Voevodina, E. (INFN, Naples) ; Votano, L. (LNF, Dafne Light) ; Vuilleumier, J.L. (U. Bern, AEC) ; Wilquet, G. (Brussels U., IIHE) ; Yoon, C.S. (Gyeongsang Natl. U.)

Publication 2020-08-04
Imprint 2019-12-23
Number of pages 10
Note 10 pages, 7 figures; Editors: Marco Roda, Chiara Sirignano and Gabriele Sirri
In: Eur. Phys. J. C 80 (2020) 699
DOI 10.1140/epjc/s10052-020-8160-y
Subject category hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; OPERA CNGS1
Abstract An event topology with two secondary vertices compatible with the decay of short-lived particles was found in the analysis of neutrino interactions in the Opera target. The observed topology is compatible with tau neutrino charged current (CC) interactions with charm production and neutrino neutral current (NC) interactions with $c\overline{c}$ pair production. However, other processes can mimic this topology. A dedicated analysis was implemented to identify the underlying process. A Monte Carlo simulation was developed and complementary procedures were introduced in the kinematic reconstruction. A multivariate analysis technique was used to achieve an optimal separation of signal from background. Most likely, this event is a $\nu_{\tau}$ CC interaction with charm production, the tau and charm particle decaying into 1 prong and 2 prongs, respectively. The significance of this observation is evaluated.
Copyright/License preprint: (License: arXiv nonexclusive-distrib 1.0)
publication: © The Author(s) 2020 (License: CC-BY-4.0), sponsored by SCOAP³



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 Element opprettet 2020-01-17, sist endret 2024-03-23


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