Weak magnetic dipole moments in the MSSM

Abstract We calculate the weak magnetic dipole moment of different fermions in the MSSM. In particular, we consider in detail the predictions for the WMDM of the τ lepton and bottom quark. We compare the purely SUSY contributions with two Higgs doublet models and SM predictions. For the τ lepton, we show that chargino diagrams give the main SUSY contribution, which for tan β = 50 can be one order of magnitude larger than the SM prediction. For the b quark, gluino diagrams provide the main SUSY contribution to its weak anomalous dipole moment, which is still dominated by gluon contributions. We also study how the universality assumption in the slepton sector induces correlations between the SUSY contributions to the τ WMDM and to ( g − 2) of the muon.