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) OPERA Collaboration  128 人のオーサーを表示
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¯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 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.
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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 レコード 生成: 2020-01-17, 最終変更: 2024-03-23


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