Effective field theory interpretation of lepton magnetic and electric dipole moments

Author(s)
Jason Aebischer, Wouter Dekens, Elizabeth E. Jenkins, Aneesh V. Manohar, Dipan Sengupta, Peter Stoffer
Abstract

We perform a model-independent analysis of the magnetic and electric dipole moments of the muon and electron. We give expressions for the dipole moments in terms of operator coefficients of the low-energy effective field theory (LEFT) and the Standard Model effective field theory (SMEFT). We use one-loop renormalization group improved perturbation theory, including the one-loop matching from SMEFT onto LEFT, and one-loop lepton matrix elements of the effective-theory operators. Semileptonic four-fermion operators involving light quarks give sizable non-perturbative contributions to the dipole moments, which are included in our analysis. We find that only a very limited set of the SMEFT operators is able to generate the current deviation of the magnetic moment of the muon from its Standard Model expectation.

Organisation(s)
Particle Physics
External organisation(s)
University of California, San Diego
Journal
Journal of High Energy Physics
Volume
2021
No. of pages
30
ISSN
1029-8479
DOI
https://doi.org/10.1007/JHEP07(2021)107
Publication date
07-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103034 Particle physics, 103012 High energy physics, 103036 Theoretical physics
Keywords
ASJC Scopus subject areas
Nuclear and High Energy Physics
Portal url
https://ucris.univie.ac.at/portal/en/publications/effective-field-theory-interpretation-of-lepton-magnetic-and-electric-dipole-moments(facf8e99-4adf-4a83-a884-744730323cae).html