1993/12/13 by N. G. Deshpande, Xiao-Gang He · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.49.4812
published as Phys.Rev.D49:4812-4819,1994 · 22 pages, Revtex, OITS-529
arxiv created 1993/12/13 · openalex publication_date 1994/05/01 · arxiv updated 2010/11/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study CP violation in a multi-Higgs-doublet model based on a S3\ifmmode×\else\texttimes\fiZ3 horizontal symmetry where the 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. \frac\ensuremathε^\ensuremath'\ensuremathε due to neutral Higgs boson exchange is small in both mechanisms, but charged Higgs boson contributions can be as large as 10^\ensuremath-4 for (a), and 10^\ensuremath-3 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 experimental 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).