Publication Date
2021
Journal or Book Title
Physics Letters B
Abstract
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 nu(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. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
ISSN
0370-2693
ORCID
Nishimura, Shoichiro/0000-0002-5581-4090; Kawamura, Naritoshi/0000-0002-3099-5526; Kanda, Sohtaro/0000-0002-9080-4154; Tanaka, Kazuo/0000-0001-6916-9654
DOI
https://doi.org/10.1016/j.physletb.2021.136154
Volume
815
License
UMass Amherst Open Access Policy
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Funder
MLF of J-PARC [2017A0134]; Japanese JSPS KAKENHI [23244046, 26247046, 14J11374, 15K17666, 15H05742, 17H01133]
Recommended Citation
Kanda, S.; Fukao, Y.; Ikedo, Y.; Ishida, K.; Iwasaki, M.; Kawall, D.; Kawamura, N.; Kojima, K. M.; Kurosawa, N.; and Matsuda, Y., "New Precise Spectroscopy of the Hyperfine Structure in Muonium With a High-Intensity Pulsed Muon Beam" (2021). Physics Letters B. 1289.
https://doi.org/10.1016/j.physletb.2021.136154
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