Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-12-13
Phys.Rev.D49:4812-4819,1994
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, Revtex, OITS-529
Scientific paper
10.1103/PhysRevD.49.4812
We study CP violation in a multi-Higgs doublet model based on a $S_3 \times Z_3$ horizontal symmetry where CKM phase is not the principal source of CP violation. We consider two mechanisms for CP violation in this model: a) CP violation due to complex Yukawa couplings; and b) CP violation due to scalar-pseudoscalar Higgs boson mixings. Both mechanisms can explain the observed CP violation in the neutral Kaon system. $\epsilon'/\epsilon$ due to neutral Higgs boson exchange is small in both mechanisms, but charged Higgs boson con- tributions can be as large as $10^{-3}$ for a), and $10^{-4}$ for b). CP violation in the neutral B system is, however, quite different from the Minimal Standard Model. The neutron Electric Dipole Moment can be as large as the present ex- perimental bound, and can be used to constrain charged Higgs boson masses. The electron EDM is one order of magnitude below the experimental bound in case b) and smaller in case a).
Deshpande Nilendra G.
He Xiao-Gang
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