Abstract
The upper bounds from the ATLAS and CMS experiments on the decay rate of the Higgs boson to two muons provide the strongest constraint on an imaginary part of the muon Yukawa coupling. This bound is more than an order of magnitude stronger than bounds from -violating observables, specifically the electric dipole moment of the electron. It excludes a scenario—which had been viable prior to these measurements—that a complex muon Yukawa coupling is the dominant source of the baryon asymmetry. Even with this bound, the muon source can still contribute of the asymmetry.
- Received 25 December 2019
- Accepted 9 April 2020
DOI:https://doi.org/10.1103/PhysRevLett.124.181801
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society