A 2 HIGGS DOUBLET MODEL FOR THE TOP-QUARK

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 doubler with a much larger vacuum expectation value. The electric dipole moment (EDM) of t he electron is evaluated with loop diagrams of the third generation fe rmions as well as the charm quark. The D-0 - (D) over bar(0) mixing ge nerated from flavor changing neutral Higgs interactions is estimated. The electron EDM and the D-0 - (D) over bar(0) mixing can be significa ntly enhanced for a large tan beta equivalent to \v(2)\/\v(1)\.