학술논문
First observation of a tau neutrino charged current interaction with charm production in the OPERA experiment
Document Type
article
Author
N. Agafonova; A. Aleksandrov; A. Anokhina; S. Aoki; A. Ariga; T. Ariga; A. Bertolin; C. Bozza; R. Brugnera; A. Buonaura; S. Buontempo; M. Chernyavskiy; A. Chukanov; L. Consiglio; N. D’Ambrosio; G. De Lellis; M. De Serio; P. del Amo Sanchez; A. Di Crescenzo; D. Di Ferdinando; N. Di Marco; S. Dmitrievski; M. Dracos; D. Duchesneau; S. Dusini; T. Dzhatdoev; J. Ebert; A. Ereditato; R. A. Fini; F. Fornari; T. Fukuda; G. Galati; A. Garfagnini; V. Gentile; J. Goldberg; S. Gorbunov; Y. Gornushkin; G. Grella; A. M. Guler; C. Gustavino; C. Hagner; T. Hara; T. Hayakawa; A. Hollnagel; K. Ishiguro; A. Iuliano; K. Jakovcic; C. Jollet; C. Kamiscioglu; M. Kamiscioglu; S. H. Kim; N. Kitagawa; B. Klicek; K. Kodama; M. Komatsu; U. Kose; I. Kreslo; F. Laudisio; A. Lauria; A. Longhin; P. Loverre; A. Malgin; M. Malenica; G. Mandrioli; T. Matsuo; V. Matveev; N. Mauri; E. Medinaceli; A. Meregaglia; S. Mikado; M. Miyanishi; F. Mizutani; P. Monacelli; M. C. Montesi; K. Morishima; M. T. Muciaccia; N. Naganawa; T. Naka; M. Nakamura; T. Nakano; K. Niwa; N. Okateva; S. Ogawa; K. Ozaki; A. Paoloni; L. Paparella; B. D. Park; L. Pasqualini; A. Pastore; L. Patrizii; H. Pessard; D. Podgrudkov; N. Polukhina; M. Pozzato; F. Pupilli; M. Roda; T. Roganova; H. Rokujo; G. Rosa; O. Ryazhskaya; O. Sato; A. Schembri; I. Shakirianova; T. Shchedrina; H. Shibuya; E. Shibayama; T. Shiraishi; S. Simone; C. Sirignano; G. Sirri; A. Sotnikov; M. Spinetti; L. Stanco; N. Starkov; S. M. Stellacci; M. Stipcevic; P. Strolin; S. Takahashi; M. Tenti; F. Terranova; V. Tioukov; S. Vasina; P. Vilain; E. Voevodina; L. Votano; J. L. Vuilleumier; G. Wilquet; C. S. Yoon
Source
European Physical Journal C: Particles and Fields, Vol 80, Iss 8, Pp 1-10 (2020)
Subject
Language
English
ISSN
1434-6044
1434-6052
1434-6052
Abstract
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 $$c\overline{c}$$ cc¯ 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 $$\nu _{\tau }$$ ντ 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.