Top dipole form factors and loop-induced CP violation in supersymmetry

The one-loop Minimal Supersymmetric Standard Model (MSSM) contributions to the weak and electromagnetic dipole form factors of the top quark are prese nted. Far from the Z peak, they are not sufficient to account for all the n ew physics effects. In the context of the calculation of the process e(+)e( -) --> t (t) over bar to one loop in the MSSM, we compare the impact on the phenomenology of the CP-violating dipole form factors of the top quark wit h the contribution from CP-violating box graphs. Some exemplificative obser vables are analyzed and the relevance of both the contributions is pointed out. The one-loop expressions for the electromagnetic and weak dipole form factors in a general renormalizable theory and the SM and MSSM couplings an d conventions are also given. (C) 1999 Elsevier Science B.V. All rights res erved.