Genuine extra yukawas from extra Higgs, implications
Journal
Proceedings of the 53rd Rencontres de Moriond - 2018 QCD and High Energy Interactions
Pages
167-170
Date Issued
2018
Author(s)
Abstract
With a second Higgs doublet, extra Yukawa couplings ?ij generally exist. Baryon Asymmetry of the Universe (BAU) can be accounted for by ?tt ~ O(1), with first order electroweak phase transition (EWPT) arising from O(1) Higgs quartic couplings. The latter can explain why the observed h(125) boson so resembles the Standard Model (SM) Higgs: with coupling ?6 ~ O(1) for two-doublet mixing, the H-h mixing angle cos ? ~= -?6v2/(m2H -m2h) is suppressed by the CP-even boson mass splitting m2H -m2h > few v2. The approximate alignment, together with the fermion mass-mixing pattern, controls FCNC Higgs effects at low energy. The picture can be probed by pp ? ttc¯, ttt¯, i.e. same-sign top and triple-top processes at the LHC. ? Published by ARISF, 2018
Subjects
Bosons; Couplings; Fermions; Baryon asymmetry; Electroweak phase transition; Fermion mass; First order; Mixing angle; The standard model; Yukawa couplings; Mixing
Type
conference paper