Abstract
We study the prospect of probing electroweak baryogenesis driven by an extra bottom Yukawa coupling ρbb in a general two Higgs doublet model via electric dipole moment (EDM) measurements and at the collider experiments. The parameter space receives meaningful constraints from 125 GeV Higgs h boson signal strength measurements as well as several heavy Higgs boson searches at the Large Hadron Collider (LHC). In addition, we show that the asymmetry of the CP asymmetry of inclusive B → Xsγ decay would provide complementary probe. A discovery is possible at the LHC via bg → bA → bZh process if |ρbb| ∼ 0.15 and 250 GeV≲ mA ≲ 350 GeV, where A is CP odd scalar. For mA > 2mt threshold, where mt is the top quark mass, one may also discover bg → bA → \( bt\overline{t} \) at the high luminosity LHC run if an extra top Yukawa coupling |ρtt| ∼ 0.5, though it may suffer from systematic uncertainties. For completeness we study gg → \( t\overline{t}A \) → \( t\overline{t}b\overline{b} \) but find it not promising.
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Modak, T., Senaha, E. Probing electroweak baryogenesis induced by extra bottom Yukawa coupling via EDMs and collider signatures. J. High Energ. Phys. 2020, 25 (2020). https://doi.org/10.1007/JHEP11(2020)025
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DOI: https://doi.org/10.1007/JHEP11(2020)025