Abstract
We evaluate the baryon number abundance based on the charge transport scenario of top quarks in the CP-violating two Higgs doublet model, in which Yukawa interactions are aligned to avoid dangerous flavor changing neutral currents, and coupling constants of the lightest Higgs boson with the mass 125 GeV coincide with those in the standard model at tree level to satisfy the current LHC data. In this model, the severe constraint from the electric dipole moment of electrons, which are normally difficult to be satisfied, can be avoided by destructive interferences between CP-violating phases in Yukawa interactions and scalar couplings in the Higgs potential. Viable benchmark scenarios are proposed under the current available data and basic theoretical bounds. We find that the observed baryon number can be reproduced in this model, where masses of additional Higgs bosons are typically 300–400 GeV. Furthermore, it is found that the triple Higgs boson coupling is predicted to be 35–55 % larger than the standard model value.
Highlights
JHEP01(2022)104 transition at high temperatures [11]
We evaluate the baryon number abundance based on the charge transport scenario of top quarks in the CP-violating two Higgs doublet model, in which Yukawa interactions are aligned to avoid dangerous flavor changing neutral currents, and coupling constants of the lightest Higgs boson with the mass 125 GeV coincide with those in the standard model at tree level to satisfy the current LHC data
We evaluate the baryon asymmetry generated by the electroweak baryogenesis in this aligned scenario of the CP-violating Two Higgs Doublet Models (THDMs)
Summary
We consider the model including two SU(2)L doublets Φ1 and Φ2, whose hypercharges are Y = 1/2 Both doublets can have Vacuum Expectation Values (VEVs) without violating the electromagnetic charge conservation. V = −μ21|Φ1|2 − μ22|Φ2|2 − μ23(Φ†1Φ2) + h.c. The coupling constants μ23, λ5, λ6, and λ7 are generally complex numbers, one of them can be real by the redefinition of the phase of Φ2. The neutral scalars h1, h2 and h3 are generally mixed, and their mass terms are given by. The mixings between neutral scalar states at tree level are caused by only one coupling constant λ6. The Yukawa interactions between each scalar mass eigenstate and the SM fermions are given by. The relation between the Yukawa sector of the model and that of the THDM with softlybroken Z2 symmetry [105, 108,109,110] is shown in refs. [40, 79]
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