New precise spectroscopy of the hyperfine structure in muonium with a high-intensity pulsed muon beam

Kanda, S.; Fukao, Y.; Ikedo, Yutaka; Ishida, K.; Iwasaki, M.; Kawall, D.; Kawamura, N.; Kojima, Kenji; Kurosawa, Noriyuki; Matsuda, Y.; Mibe, T.; Miyake, Yasuhiro; Nishimura, S.; Saito, N.; Sato, Y.; Seo, S. H.; Shimomura, K.; Strasser, P.; Tanaka, Kazuo; Tanaka, T.; Torii, H. A.; Toyoda, A.; Ueno, Yuichiro

doi:10.1016/j.physletb.2021.136154

Cited by 34 publications

(32 citation statements)

References 34 publications

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“…The realization of the high intensity muon beam (HiMB) at PSI [54] would open the way to push the accuracy of this experiment to its ultimate limit of few tens of kHz. Combined with other ongoing M spectroscopy experiments [19,55,56], one would probe the very interesting region of parameter space for a new scalar or vector boson with m ϕ > 300 keV where astrophysical bounds do not apply [57].…”

mentioning

confidence: 99%

Precision Measurement of the Lamb Shift in Muonium

et al. 2022

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We report a new measurement of the n ¼ 2 Lamb shift in Muonium. Our result of 1047.2ð2.3Þ stat ð1.1Þ syst MHz comprises an order of magnitude improvement upon the previous best measurement. This value matches the theoretical calculation within 1 standard deviation allowing us to set limits on Lorentz and CPT violation in the muonic sector, as well as on new physics coupled to muons and electrons which could provide an explanation of the muon g − 2 anomaly.

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mentioning

confidence: 99%

Precision Measurement of the Lamb Shift in Muonium

et al. 2022

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“…The realization of the High intensity Muon Beam (HiMB) at PSI [50] would open the way to push the accuracy of this experiment to its ultimate limit of few tens of kHz. This precision, along with other ongoing M spectroscopy experiments [18,51,52] would allow to fully probe the very interesting region of parameter space for a new scalar/vector boson with m φ > 300 keV suggested by the g − 2 anomaly where astrophysical bounds do not apply [53].…”

Section: Lamb Shiftmentioning

confidence: 91%

Precision measurement of the Lamb shift in Muonium

Ohayon,

Janka,

Cortinovis

et al. 2021

Preprint

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We report a new measurement of the n = 2 Lamb shift in Muonium using microwave spectroscopy. Our result of 1047.2(2.3)stat(1.1)syst MHz comprises an order of magnitude improvement upon the previous best measurement. This value matches the theoretical calculation within one standard deviation allowing us to set limits on CPT violation in the muonic sector, as well as on new physics coupled to muons and electrons which could provide an explanation of the muon g − 2 anomaly.

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“…The interest of the Mu-atom in fundamental physical studies stems from it being relatively long-lived (about 2 µs) and from being the leptonic system with the smallest possible Bohr radius; in fact, the Mu-atom is already being studied for its value as a testing ground of QED corrections [54] and is only recently being considered as a possible test of CPT and the WEP.…”

Section: The Mu-atommentioning

confidence: 99%