A Two Higgs Doublet Model for the Top Quark

Abstract

A two Higgs doublet model with special Yukawa interactions for the top quark and a softly broken discrete symmetry in the Higgs potential is proposed. In this model, the top quark is much heavier than the other quarks and leptons because it couples to a Higgs doublet with a much larger vacuum expectation value. The electric dipole moment (EDM) of the electron is evaluated with loop diagrams of the third generation fermions as well as the charm quark. The electron EDM is significantly enhanced for a naturally large $\tan \beta \equiv |v_2|/|v_1|$.

LaTex file, 13 pages, 3 figures available upon request to [email protected]

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