Abstract
We observe a generic connection between LHC Higgs data and electroweak baryogenesis: the particle that contributes to the -odd or vertex would provide the -violating source during a first-order phase transition. It is illustrated in the two Higgs doublet model that a common complex phase controls the lightest Higgs properties at the LHC, electric dipole moments, and the -violating source for electroweak baryogenesis. We perform a general parametrization of Higgs effective couplings and a global fit to the LHC Higgs data. Current LHC measurements prefer a nonzero phase for and electric dipole moment constraints still allow an order-one phase for , which gives sufficient room to generate the correct cosmic baryon asymmetry. We also give some prospects in the direct measurements of violation in the Higgs sector at the LHC.
- Received 13 April 2013
DOI:https://doi.org/10.1103/PhysRevLett.111.091801
© 2013 American Physical Society