SACLAY-T03/053

[**Lepton Electric Dipole Moments\
.2cm from Heavy States Yukawa Couplings** ]{}

0.5cm

**Isabella Masina**

*Service de Physique Théorique [^1] , CEA-Saclay*

*F-91191 Gif-sur-Yvette, France*

**Abstract**

In supersymmetric theories the radiative corrections due to heavy states could leave their footprints in the flavour structure of the supersymmetry breaking masses. We investigate whether present and future searches for the muon and electron EDMs could be sensitive to the CP violation and flavour misalignment induced on slepton masses by the radiative corrections due to the right-handed neutrinos of the seesaw model and to the heavy Higgs triplets of $SU(5)$ GUT. When this is the case, limits on the relevant combination of neutrino Yukawa couplings are obtained. Explicit analytical expressions are provided which accounts for the dependencies on the supersymmetric mass parameters.

.3cm

Introduction
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In low energy supersymmetric extensions of the Standard Model (SM), unless sparticle masses are considerably increased, present limits on flavour violating (FV) decays and electric dipole moments (EDMs) respectively allow for a quite small amount of fermion-sfermion misalignment in the flavour basis and constrain the phases in the diagonal elements of sfermion masses, involving the parameters $\mu$ and $A$, to be rather small. The bounds on the supersymmetric 