Sources of CP Violation in the Two-Higgs Doublet Model
Yue-Liang Wu, Lincoln Wolfenstein
Abstract
Assuming CP violation arises solely through the Higgs potential, we develop the most general two-Higgs doublet model. There is no discrete symmetry that distinguishes the two Higgs bosons. It is assumed that an approximate global family symmetry sufficiently suppresses flavor-changing neutral scalar interactions. In addition to a CKM phase, neutral boson mixing, and superweak effects, there can be significant CP violation due to charged Higgs boson exchange. The value of ε'/ε due to this last effect could be as large as in the standard model.
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