Weak dipole moments of heavy fermions with flavor violation induced by Z′ gauge bosons

Abstract

A calculation of weak dipole moments of charged fermions of the standard model at the one-loop level, in the context of a general effective extended neutral current model with flavor changing vertices, is presented. We give numerical predictions for the anomalous weak magnetic dipole moment , and the weak electric dipole moment (WEDM) , for the τ lepton and t quark. For several Z′ gauge bosons considered, we find that, for the τ lepton, the best prediction for the real part of is of the order of 10−9, while the imaginary part is four orders of magnitude below. The highest value for the WEDM, , corresponds to 10−26 e cm, for its real part, and the imaginary part is three orders of magnitude below. Moreover, we found for the top quark, that the best prediction for the real part of is of the order of 10−7 and its imaginary part is of the order of 10−11. We also found that is of the order of 10−26 e cm for its real part, and its imaginary part can be as high as 10−31 e cm.