A Final Word on FCNC-Baryogenesis from Two Higgs Doublets
Wei-Shu Hou, Tanmoy Modak, Tilman Plehn
TL;DR
This paper discusses electroweak baryogenesis within a two-Higgs doublet model, emphasizing flavor-changing Higgs couplings, especially top-charm, as a source of CP violation, and explores how LHC searches can test this scenario.
Contribution
It provides a comprehensive analysis of flavor-changing Higgs couplings in two-Higgs doublet models and their testability through LHC searches for heavy Higgs bosons.
Findings
Top-charm Higgs coupling is weakly constrained.
LHC searches for heavy Higgs bosons can test this baryogenesis scenario.
Same-sign top pair searches are promising for detection.
Abstract
Electroweak baryogenesis in a two-Higgs doublet model is a well-motivated and testable scenario for physics beyond the Standard Model. An attractive way of providing violation is through flavor-changing Higgs couplings, where the top-charm coupling is hardly constrained. This minimal scenario can be tested by searching for heavy charged and neutral Higgs bosons at the LHC. While the charged Higgs signature requires a dedicated analysis, the neutral Higgs signature will be covered by a general search for same-sign top pairs. Together, they provide a conclusive test of this kind of baryogenesis.
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