New precise spectroscopy of the hyperfine structure in muonium with a high-intensity pulsed muon beam
New precise spectroscopy of the hyperfine structure in muonium with a high-intensity pulsed muon beam
复制标题
DOI：
10.1016/j.physletb.2021.136154
复制
发表时间：
2020-04
影响因子：
4.4
通讯作者：
S. Kanda;Y. Fukao;Y. Ikedo;K. Ishida;M. Iwasaki;D. Kawall;N. Kawamura;K. Kojima;N. Kurosawa;Y. Matsuda;T. Mibe;Y. Miyake;S. Nishimura;N. Saito;Y. Sato;S. Seo;K. Shimomura;P. Strasser;Koichi Tanaka;T. Tanaka;H. Torii;A. Toyoda;Y. Ueno
中科院分区：
文献类型：
--
作者：
S. Kanda;Y. Fukao;Y. Ikedo;K. Ishida;M. Iwasaki;D. Kawall;N. Kawamura;K. Kojima;N. Kurosawa;Y. Matsuda;T. Mibe;Y. Miyake;S. Nishimura;N. Saito;Y. Sato;S. Seo;K. Shimomura;P. Strasser;Koichi Tanaka;T. Tanaka;H. Torii;A. Toyoda;Y. Ueno
由一个正μ子和一个电子组成的类氢原子被称为μ素。它是一个近似理想的两体系统，可以用来精确检验束缚态理论和基本对称性。MuSEUM合作在J-PARC使用高强度脉冲μ子束和高速率正电子计数器对μ 鎓基态超精细结构进行了新的精确测量。在近零磁场下成功观察到超精细跃迁共振，获得μ 鎓超精细结构间隔ν HFS= 4.463302（4）GHz，相对精度为0.9 ppm。计算结果与美国洛斯阿拉莫斯国家实验室的实验结果和目前的理论计算结果一致。我们展示了μ 鎓的微波光谱，以供未来的实验达到最高的精度。
A hydrogen-like atom consisting of a positive muon and an electron is known as muonium. It is a near-ideal two-body system for a precision test of bound-state theory and fundamental symmetries. The MuSEUM collaboration performed a new precision measurement of the muonium ground-state hyperfine structure at J-PARC using a high-intensity pulsed muon beam and a high-rate capable positron counter. The resonance of hyperfine transition was successfully observed at a near-zero magnetic field, and the muonium hyperfine structure interval of ν HFS= 4.463302 (4) GHz was obtained with a relative precision of 0.9 ppm. The result was consistent with the previous ones obtained at Los Alamos National Laboratory and the current theoretical calculation. We present a demonstration of the microwave spectroscopy of muonium for future experiments to achieve the highest precision.