Electroweak baryogenesis via bottom transport

Abstract

We consider a scenario in which an extra bottom Yukawa coupling can drive electroweak baryogenesis in the general two-Higgs doublet model. It is found that the new bottom Yukawa coupling with O(0.1) in magnitude can generate the sufficient baryon asymmetry without conflicting existing data. We point out that future measurements of the bottom Yukawa coupling at High-Luminosity Large Hadron Collider and International Linear Collider, together with the CP asymmetry of B → Xsγ at SuperKEKB provide exquisite probes for this scenario.

Echoes of 2HDM inflation at the collider experiments

“…In general ρ F i j , μ 2 12 , λ 5 , λ 6 and λ 7 could be complex. We however briefly remark that such complex couplings receive stringent constraints from electron, neutron and mercury electric dipole moment (EDM) measurements [93,94]. In this regard, asymmetry of CP asymmetry (ΔA CP ) of charged and neutral B → X s γ decays could be relevant [94,96] even though the observable has associated hadronic uncertainties.…”

“…We however briefly remark that such complex couplings receive stringent constraints from electron, neutron and mercury electric dipole moment (EDM) measurements [93,94]. In this regard, asymmetry of CP asymmetry (ΔA CP ) of charged and neutral B → X s γ decays could be relevant [94,96] even though the observable has associated hadronic uncertainties. The future Belle-II measurement of ΔA CP [92] could reduce the available parameter space for imaginary ρ tt [94][95][96].…”

“…In this regard, asymmetry of CP asymmetry (ΔA CP ) of charged and neutral B → X s γ decays could be relevant [94,96] even though the observable has associated hadronic uncertainties. The future Belle-II measurement of ΔA CP [92] could reduce the available parameter space for imaginary ρ tt [94][95][96]. Moreover, we set all λ i s and ρ i j s to zero except for λ t , ρ tt and ρ tc and, assumed ρ ii could be ∼ λ i with suppressed off diagonal ρ i j s. If such coupling structure is realized in nature, we find that couplings other than λ t , ρ tt and ρ tc have inconsequential effects in inflationary dynamics.…”

Aligned CP-violating Higgs sector canceling the electric dipole moment

“…For the successful scenario of EWBG, the Higgs sector is extended in order to obtain additional CP-violating phases and the strongly first-order EWPT from the minimal form assumed in the SM. For example, the EWBG scenario was discussed in models with additional isospin singlets [8][9][10], doublets [11][12][13][14][15][16][17] and triplets [18,19].…”

Production of tZH and tZh in 2HDM: Prospects for discovery at the LHC

“…In general, the presence of ρ tt would reduce the discovery potential of tZH because of BðA → ttÞ, but it opens up other modes for A → ZH discovery, for example, induces A → ZH signal via loop induced gg → A → ZH [18]. The same is true for ρ bb , where A → ZH can be induced by gb → bA → bZH [56] as well as gg → bbA → bbZH [56,57]. One can also have gg → A → Zh [25] and gg → bbA → bbZh [25,58,59].…”