Precision measurement of the Lamb shift in Muonium

We report a new measurement of the $n=2$ Lamb shift in Muonium using microwave spectroscopy. Our result of $1047.2(2.3)_\textrm{stat}(1.1)_\textrm{syst}$ MHz comprises an order of magnitude improvement upon the previous best measurement. This value matches the theoretical calculation within one stan...

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Bibliographic Details
Main Authors:	Ohayon, B, Janka, G, Cortinovis, I, Burkley, Z, Bourges, L. de Sousa, Depero, E, Golovizin, A, Ni, X, Salman, Z, Suter, A, Vigo, C, Prokscha, T, Crivelli, P
Format:	Journal Article
Language:	English
Published:	30-09-2021
Subjects:	Physics - Atomic Physics Physics - High Energy Physics - Experiment
Online Access:	Get full text
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Summary:	We report a new measurement of the $n=2$ Lamb shift in Muonium using microwave spectroscopy. Our result of $1047.2(2.3)_\textrm{stat}(1.1)_\textrm{syst}$ 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.
DOI:	10.48550/arxiv.2108.12891