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

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

Experimental Particle Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

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.

Original language	English
Article number	104
Journal	Proceedings of Science
Volume	402
Publication status	Published - Mar 31 2022
Event	22nd International Workshop on Neutrinos from Accelerators, NuFact 2021 - Cagliari, Italy Duration: Sept 6 2021 → Sept 11 2021

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Kyohei, N., Fujii, Y., Fukao, Y., Hashimoto, Y., Higuchi, Y., Honda, R., Igarashi, Y., Ikeda, F., Mihara, S., Muto, R., Nakazawa, Y., Nishiguchi, H., Oishi, K., Shoji, M., Tamura, F., Tojo, J., Tomizawa, M., Ueno, K., & Yoshida, H. (2022). Extinction Measurement at J-PARC MR with Slow-Extracted Pulsed Proton Beam for COMET Experiment. Proceedings of Science, 402, Article 104.

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

abstract = "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.",

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

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons; 22nd International Workshop on Neutrinos from Accelerators, NuFact 2021 ; Conference date: 06-09-2021 Through 11-09-2021",

year = "2022",

month = mar,

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T1 - Extinction Measurement at J-PARC MR with Slow-Extracted Pulsed Proton Beam for COMET Experiment

AU - Kyohei, Noguchi

AU - Fujii, Yuki

AU - Fukao, Yoshinori

AU - Hashimoto, Yoshinori

AU - Higuchi, Yuya

AU - Honda, Ryotaro

AU - Igarashi, Yoichi

AU - Ikeda, Fumihito

AU - Mihara, Satoshi

AU - Muto, Ryotaro

AU - Nakazawa, Yu

AU - Nishiguchi, Hajime

AU - Oishi, Kou

AU - Shoji, Masayoshi

AU - Tamura, Fumihiko

AU - Tojo, Junji

AU - Tomizawa, Masahito

AU - Ueno, Kazuki

AU - Yoshida, Hisataka

PY - 2022/3/31

Y1 - 2022/3/31

N2 - 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.

AB - 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.

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M3 - Conference article

AN - SCOPUS:85128910009

SN - 1824-8039

VL - 402

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 104

T2 - 22nd International Workshop on Neutrinos from Accelerators, NuFact 2021

Y2 - 6 September 2021 through 11 September 2021

ER -

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

Abstract

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