A Review of $\mu \to eee$, $\mu \to e\gamma$ and $\mu N\to eN$ Conversion

Abstract

The observation of lepton flavour violation (LFV) in interactions involving charged leptons would be an unambiguous sign of physics beyond the Standard Model of particle physics. Given that muons can be produced at high intensities, searches for LFV with muons are particularly sensitive. In a global initiative, ongoing and upcoming experiments are aiming to discover physics beyond the Standard Model in the three golden muon LFV channels: $\mu \to e\gamma$, $\mu \to eee$ and $\mu$-to-$e$ conversion on nuclei. With innovative detector concepts and new muon beam lines, these experiments will be able to investigate muon LFV in the coming years with sensitivities improved by up to four orders of magnitude compared to past searches. The current status of muon LFV searches is discussed and the ongoing MEG II and DeeMe experiments as well as the upcoming Mu2e, COMET and Mu3e experiments are presented.

arXiv comment14 pages, 12 figures, proceedings of the 21st Conference on Flavor Physics and CP Violation (FPCP 2023)

References in corpus (17)

• Evidence for oscillation of atmospheric neutrinos
• First Results from KamLAND: Evidence for Reactor Anti-Neutrino Disappearance
• Measurement of the rate of nu_e + d --> p + p + e^- interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory
• Muon Decay and Physics Beyond the Standard Model
• Observation of Anomalous Internal Pair Creation in ${}^8$Be: A Possible Signature of a Light, Neutral Boson
• The design of the MEG II experiment
• Lepton Flavor and Number Conservation, and Physics Beyond the Standard Model
• Renormalisation-group improved analysis of $\mu \to e$ processes in a systematic effective-field-theory approach
• On the model discriminating power of mu -> e conversion in nuclei
• Technical design of the phase I Mu3e experiment
• A search for two body muon decay signals
• The Mu2e Experiment
• QED Meson Description of the X17 and Other Anomalous Particles
• Lepton-flavor violating axions at MEG II
• Science Case for the new High-Intensity Muon Beams HIMB at PSI
• Search for Majoron at the COMET Experiment
• An Overview of the COMET Experiment and its Recent Progress

Cited by in corpus (1)

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