Muonium Lamb shift: theory update and experimental prospects

Abstract

We review the theory of the Lamb shift for muonium, provide an updated numerical value and present the prospects of the Mu-MASS collaboration at PSI to improve upon their recent measurement. Due to its smaller nuclear mass, the contributions of the higher-order recoil corrections (160kHz level) and nucleus self-energy 40kHz level) are enhanced for muonium compared to hydrogen where those are below the level of the latest measurement performed by Hessels et al. and thus could not be tested yet. The ongoing upgrades to the Mu-MASS setup will open up the possibility to probe these contributions and improve the sensitivity of this measurement to searches for new physics in the muonic sector.

8 pages

References in corpus (5)

• Precision measurement of the Lamb shift in Muonium
• The Lamb shift of the $1s$ state in hydrogen: two-loop and three-loop contributions
• Stable High Power deep-UV Enhancement Cavity in Ultra High Vacuum with Fluoride Coatings
• Intense beam of metastable Muonium
• Three-Loop Corrections to Lamb Shift in Muonium and Positronium

Cited by in corpus (8)

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• Two-Loop Electron Factor Contribution to Lamb Shift in Muonium and Positronium
• Room-temperature emission of muonium from aerogel and zeolite targets
• Neutrino force at all length scales
• Functional Epistemology "Nullifies" Dyson's Rebuttal of Perturbation Theory