Update of Muonium 1 S -2 S transition frequency

We present an updated value of the Muonium 1 -2 transition frequency, highlighting contributions from different QED corrections as well as the large uncertainty in the Dirac contribution, stemming from the uncertainty of the electron to muon mass ratio. Improving the measurement of this spectral lin...

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Bibliographic Details
Published in:The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2023, Vol.77 (4), p.66
Main Authors: Cortinovis, Irene, Ohayon, Ben, de Sousa Borges, Lucas, Janka, Gianluca, Golovizin, Artem, Zhadnov, Nikita, Crivelli, Paolo
Format: Article
Language:English
Online Access:Get full text
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Summary:We present an updated value of the Muonium 1 -2 transition frequency, highlighting contributions from different QED corrections as well as the large uncertainty in the Dirac contribution, stemming from the uncertainty of the electron to muon mass ratio. Improving the measurement of this spectral line would allow to extract a more accurate determination of fundamental constants, such as the electron to muon mass ratio or, combined with the Muonium hyperfine splitting, an independent value of the Rydberg constant. Furthermore, we report on the current status of the Mu-MASS experiment, which aims at measuring the Muonium 1 -2 transition frequency at a uncertainty level.
ISSN:1434-6079