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Study on the accidental background of the JSNS$$^2$$ experiment

Lee, D. H.*; 百々 拓; 羽賀 勝洋  ; 原田 正英   ; 長谷川 勝一   ; 春日井 好己  ; 木下 秀孝   ; 増田 志歩; 明午 伸一郎   ; 酒井 健二 ; 鈴谷 賢太郎; 山口 雄司   ; 他46名*

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$$^2$$ (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$$^2$$ experiment performed data taking from 2021. In this manuscript, a study of the accidental background is presented. The rate of the accidental background is (9.29$${pm}$$0.39)$${times}$$10$$^{-8}$$ / spill with 0.75 MW beam power and comparable to the expected number of signal events.

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パーセンタイル:47.16

分野:Physics, Particles & Fields

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