2018/05/14 by George Wei-Shu Hou, Hou, George Wei-Shu · 1 citation
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1805.05103
openalex publication_date 2018/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
With a second Higgs doublet, extra Yukawa couplings ρij generally exist. Baryon Asymmetry of the Universe (BAU) can be accounted for by ρtt ∼ \cal O(1), with first order electroweak phase transition (EWPT) arising from \cal O(1) Higgs quartic couplings. The latter can explain why the observed h(125) boson so resembles the Standard Model (SM) Higgs: with coupling η6 ∼\cal O(1) for two-doublet mixing, the H--h mixing angle cosγ≅ -η6 v2/(mH2 - mh2) is suppressed by the CP-even boson mass splitting mH2 - mh2 > \rm 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 → tt c, tt t, i.e. same-sign top and triple-top processes at the LHC.