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New precise measurements of muonium hyperfine structure at J-PARC MUSE

J-PARC MUSEにおけるミュオニウム超微細構造の新たな精密測定

Strasser, P.*; 阿部 充志*; 青木 正治*; Choi, S.*; 深尾 祥紀*; 東 芳隆*; 樋口 嵩*; 飯沼 裕美*; 池戸 豊*; 石田 勝彦*; 伊藤 拓実*; 伊藤 孝   ; 岩崎 雅彦*; 門野 良典*; 上垣外 修一*; 神田 聡太郎*; 川越 清以*; Kawall, D.*; 河村 成肇*; 北口 雅暁*; 幸田 章宏*; 小嶋 健児*; 久保 謙哉*; 真玉 将豊*; 松田 恭幸*; 松舘 拓也*; 三部 勉*; 三宅 康博*; 水谷 丈洋*; 永嶺 謙忠*; 西村 昇一郎*; 荻津 透*; 齊藤 直人*; 佐々木 憲一*; 瀬尾 康久*; 清水 裕彦*; 下村 浩一郎*; 末原 大幹*; 田島 美典*; 田中 香津生*; 田中 陶冶*; 東城 順治*; 友野 大*; 鳥居 寛之*; 鳥飼 映子*; 豊田 晃久*; 堤 裕樹*; 上野 健治*; 上野 恭裕*; 八木 大介*; 山本 明*; 山中 隆志*; 山崎 高幸*; 安田 浩昌*; 吉田 光宏*; 吉岡 瑞樹*

Strasser, P.*; Abe, Mitsushi*; Aoki, Masaharu*; Choi, S.*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Katsuhiko*; Ito, Takumi*; Ito, Takashi; Iwasaki, Masahiko*; Kadono, Ryosuke*; Kamigaito, Osamu*; Kanda, Sotaro*; Kawagoe, Kiyotomo*; Kawall, D.*; Kawamura, Naritoshi*; Kitaguchi, Masaaki*; Koda, Akihiro*; Kojima, Kenji M*; Kubo, Kenya*; Matama, Masato*; Matsuda, Yasuyuki*; Matsudate, Takuya*; Mibe, Tsutomu*; Miyake, Yasuhiro*; Mizutani, Takehiro*; Nagamine, Kanetada*; Nishimura, Shoichiro*; Ogitsu, Toru*; Saito, Naohito*; Sasaki, Kenichi*; Seo, Yasuhisa*; Shimizu, Hirohiko*; Shimomura, Koichiro*; Suehara, Taikan*; Tajima, Minori*; Tanaka, Kazuo*; Tanaka, Toya*; Tojo, Junji*; Tomono, Dai*; Torii, Hiroyuki*; Torikai, Eiko*; Toyoda, Akihisa*; Tsutsumi, Yuki*; Ueno, Kenji*; Ueno, Yasuhiro*; Yagi, Daisuke*; Yamamoto, Akira*; Yamanaka, Takashi*; Yamazaki, Takayuki*; Yasuda, Hiromasa*; Yoshida, Mitsuhiro*; Yoshioka, Tamaki*

High precision measurements of the ground state hyperfine structure (HFS) of muonium is a stringent tool for testing bound-state quantum electrodynamics (QED) theory, determining fundamental constants of the muon magnetic moment and mass, and searches for new physics. Muonium is the most suitable system to test QED because both theoretical and experimental values can be precisely determined. Previous measurements were performed decades ago at LAMPF with uncertainties mostly dominated by statistical errors. At the J-PARC Muon Science Facility (MUSE), the MuSEUM collaboration is planning complementary measurements of muonium HFS both at zero and high magnetic field. The new high-intensity muon beam that will soon be available at H-Line will provide an opportunity to improve the precision of these measurements by one order of magnitude. An overview of the different aspects of these new muonium HFS measurements, the current status of the preparation for high-field measurements, and the latest results at zero field are presented.

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