QCD CORRECTIONS TO CP VIOLATION FROM THE COLOR ELECTRIC-DIPOLE MOMENT OF THE B QUARK

We consider the QCD renormalization effect in the neutron electric dipole moment in models with its origin from the CP violating charged particle exchange. It is shown that, when the t quark is first integrated out, the effective lagrangian contains a vertex of the color electric dipole moment Dbc of the b quark. The CP violating three-gluon operator of the Weinberg type first begins to appear only at the scale where the b quark is further eliminated from the effective theory. We calculate the QCD evolution effect on Dbc these models. Our result is applicable to both charged Higgs models and the left-right symmetric models of CP nonconservation. © 1990.