2017/10/03 by Hou, George W. -S.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1710.01773
With two Higgs doublets but without any discrete Z2 symmetry to forbid flavor changing neutral Higgs couplings, new top Yukawa couplings ρtt and ρtc are allowed and naturally complex. Electroweak baryogenesis is remarkably efficient if both ρtt (and ρtc) and exotic Higgs quartic couplings are \cal O(1). Furthermore, the alignment phenomenon, that the observed 125 GeV boson so closely resembles the Standard Model Higgs boson, emerges naturally. One not only has many new flavor and CPV phenomena (modulo SM-like flavor organization plus alignment), but the exotic Higgs bosons H0, A0 and H+ are necessarily sub-TeV in mass, and LHC search should be readjusted.