The Muonium Atom as a Probe of Physics beyond the Standard Model

TL;DR

This paper discusses how muonium atoms can be used to test the limits of the Standard Model and search for new physics, especially through lepton number violating processes like muonium to antimuonium conversion.

Contribution

It highlights the potential of muonium as a precise probe for quantum electrodynamics, weak interactions, and possible new lepton interactions beyond the Standard Model.

Findings

Muonium can be used to test fundamental interactions.

Searches for muonium to antimuonium conversion can reveal new physics.

Muonium experiments can constrain theories beyond the Standard Model.

Abstract

The observed interactions between particles are not fully explained in the successful theoretical description of the standard model to date. Due to the close confinement of the bound state muonium ($M = \mu^+ e^-$) can be used as an ideal probe of quantum electrodynamics and weak interaction and also for a search for additional interactions between leptons. Of special interest is the lepton number violating process of sponteanous conversion of muonium to antimuonium.