Extinction Measurement at J-PARC MR with Slow-Extracted Pulsed Proton Beam for COMET Experiment

Noguchi Kyohei, Yuki Fujii, Yoshinori Fukao, Yoshinori Hashimoto, Yuya Higuchi, Ryotaro Honda, Yoichi Igarashi, Fumihito Ikeda, Satoshi Mihara, Ryotaro Muto, Yu Nakazawa, Hajime Nishiguchi, Kou Oishi, Masayoshi Shoji, Fumihiko Tamura, Junji Tojo, Masahito Tomizawa, Kazuki Ueno, Hisataka Yoshida

研究成果: ジャーナルへの寄稿会議記事査読


The COMET experiment aims to search for the neutrinoless conversion of a muon to an electron in a muonic atom. This experiment utilizes a bunched slow-extracted (bunched-SX) proton beam at 8 GeV from the J-PARC main ring synchrotron. To achieve a sensitivity of 10−17, the fraction of inter-bunch stray protons, called extinction, must be less than 10−10. The 8 GeV proton beam commissioning with a bunched-SX beam for the COMET experiment was performed in May 2021. The extinction was measured by counting all secondary pions in the K1.8BR secondary beamline in the J-PARC Hadron Experimental Facility. After the extinction studies tried out several setups, the most extinction achievable setup was performed with O(1010) statistics. This paper reports the extinction measurement and the current analysis status.

ジャーナルProceedings of Science
出版ステータス出版済み - 3月 31 2022
イベント22nd International Workshop on Neutrinos from Accelerators, NuFact 2021 - Cagliari, イタリア
継続期間: 9月 6 20219月 11 2021

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