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Title: Contributions of axionlike particles to lepton dipole moments

We examined contributions of a spin-0 axionlike particle (ALP) to lepton dipole moments, g - 2 and EDMs. Barr-Zee and light-by-light loop effects from a light pseudoscalar ALP are found to be capable of resolving the longstanding muon g - 2 discrepancy at the expense of relatively large ALP - γ γ couplings. We also discussed the compatibility of such large couplings with direct experimental constraints and perturbative unitarity bounds. Future tests of such a scenario are described. For C P -violating ALP couplings, the electron EDM is found to probe much smaller, theoretically more easily accommodated ALP interactions. We advocate future planned improvements in electron EDM searches as a way to not only significantly constrain ALP parameters, but also potentially unveil a new source of C P violation which could have far-reaching ramifications.
 [1] ;  [2] ;  [2] ;  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
  2. Univ. of Padova (Italy). Dept. of Physics and Astronomy and National Inst. of Nuclear Physics
  3. Univ. of Padova (Italy). National Inst. of Nuclear Physics
Publication Date:
Report Number(s):
Journal ID: ISSN 2470-0010; PRVDAQ; KA2401012; TRN: US1701063
Grant/Contract Number:
SC00112704; de-sc0012704
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 11; Journal ID: ISSN 2470-0010
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HEP; ALP; muon; lepton; dipole; loop; couplings; perturbative
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1338121