Muon-electron conversion from Lorentz- and CPT-violating operators

Jun 10, 2025, 7:00 PM
25m
Multicultural Greek

Multicultural Greek

Parallel session presentation Precision Physics at High Intensities Precision Physics at High Intensities

Speaker

William McNulty (Indiana University)

Description

Working in an effective field theory framework, we consider the conversion of a muon to an electron in the presence of a nucleus, mediated by Lorentz- and CPT-violating operators. A subset of these operators are uniquely constrained by this channel, and their bounds (coming from the SINDRUM II experiment) are the first reported. We also provide sensitivity estimates for upcoming searches by the Mu2e and COMET experiments; if they fail to observe this process, the bounds will be strengthened by about an order of magnitude. We note that if muon-electron conversion is observed, there are experimental signatures that could determine whether the effect is due to Lorentz-violating operators and narrow down the options among them.

Primary author

William McNulty (Indiana University)

Co-authors

Prof. Emilie Passemar (Indiana University) Dr Nathaniel Sherrill (Leibniz Universität Hannover) V. Alan Kostelecký (Indiana University)

Presentation materials