Generalized CP Invariance and the Yukawa sector of Two-Higgs Models

Abstract

We analyze generalized CP symmetries of two-Higgs doublet models, extending them from the scalar to the fermion sector of the theory. We show that, with a single exception, those symmetries imply massless fermions. The single model which accommodates a fermionic mass spectrum compatible with experimental data possesses a remarkable feature. It displays a new type of spontaneous CP violation, which occurs not in the scalar sector responsible for the symmetry breaking mechanism but, rather, in the fermion sector.

RevTex, 4 pages, no figures Version2: Remarkable additional conclusion => title & text changes; section added

References in corpus (3)

• Minkowski space structure of the Higgs potential in 2HDM: II. Minima, symmetries, and topology
• Generalized CP symmetries and special regions of parameter space in the two-Higgs-doublet model
• A new type of CP symmetry, family replication and fermion mass hierarchies

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• Accidental symmetries in the scalar potential of the Standard Model extended with two Higgs triplets