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New precise measurement of muonium hyperfine structure interval at J-PARC

J-PARCにおけるミュオニウム超微細構造の新たな精密測定

上野 恭裕*; 青木 正治*; 深尾 祥紀*; 東 芳隆*; 樋口 嵩*; 飯沼 裕美*; 池戸 豊*; 石田 啓一*; 伊藤 孝; 岩崎 雅彦*; 門野 良典*; 上垣外 修一*; 神田 聡太郎*; Kawall, D.*; 河村 成肇*; 幸田 章宏*; 小嶋 健児*; 久保 謙哉*; 松田 恭幸*; 三部 勉*; 三宅 康博*; 水谷 丈洋*; 永嶺 謙忠*; 西山 樟生*; 荻津 透*; 大久保 隆治*; 斉藤 直人*; 佐々木 憲一*; 下村 浩一郎*; Strasser, P.*; 菅野 未知央*; 田島 美典*; 田中 香津生*; 友野 大*; 鳥居 寛之*; 鳥養 映子*; 豊田 晃久*; 上野 彰*; 山本 明*; 吉田 光宏*

Ueno, Yasuhiro*; Aoki, Masaharu*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Keiichi*; Ito, Takashi; Iwasaki, Masahiko*; Kadono, Ryosuke*; Kamigaito, Osamu*; Kanda, Sotaro*; Kawall, D.*; Kawamura, Naritoshi*; Koda, Akihiro*; Kojima, Kenji*; Kubo, Kenya*; Matsuda, Yasuyuki*; Mibe, Tsutomu*; Miyake, Yasuhiro*; Mizutani, Takehiro*; Nagamine, Kanetada*; Nishiyama, Kusuo*; Ogitsu, Toru*; Okubo, Ryuji*; Saito, Naoto*; Sasaki, Kenichi*; Shimomura, Koichiro*; Strasser, P.*; Sugano, Michinaka*; Tajima, Minori*; Tanaka, Kazuo*; Tomono, Dai*; Torii, Hiroyuki*; Torikai, Eiko*; Toyoda, Akihisa*; Ueno, Akira*; Yamamoto, Akira*; Yoshida, Mitsuhiro*

MuSEUM is an international collaboration aiming at a new precise measurement of the muonium hyperfine structure at J-PARC (Japan Proton Accelerator Research Complex). Utilizing its intense pulsed muon beam, we expect a ten-fold improvement for both measurements at high magnetic field and zero magnetic field. We have developed a sophisticated monitoring system, including a beam profile monitor to measure the 3D distribution of muonium atoms to suppress the systematic uncertainty.

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