Study on the accidental background of the JSNS experiment

Lee, D. H.*; Dodo, Taku; Haga, Katsuhiro ; Harada, Masahide ; Hasegawa, Shoichi ; Kasugai, Yoshimi ; Kinoshita, Hidetaka ; Masuda, Shiho; Meigo, Shinichiro ; Sakai, Kenji ; Suzuya, Kentaro; Yamaguchi, Yuji ; 46 of others*

JSNS (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment that searches for sterile neutrinos via the observation of $bar{nu}_{mu} to bar{nu}_{e}$ appearance oscillations using muon decay-at-rest neutrinos. The JSNS experiment performed data taking from 2021. In this manuscript, a study of the accidental background is presented. The rate of the accidental background is (9.290.39)10 $^{-8}$ / spill with 0.75 MW beam power and comparable to the expected number of signal events.

Language	:	English
Journal	:	European Physical Journal C
Volume	:	84
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Pages	:	p.409_1 - 409_6
Publication Year/Month	:	2024/04
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Paper URL	:	https://doi.org/10.1140/epjc/s10052-024-12778-7
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Registration No. : AA20240949
JAEA Abstracts No. : 53000460
Paper Submission No. : 29231

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