A New Parametrization of the Seesaw Mechanism and Applications in Supersymmetric Models
نویسندگان
چکیده
We present a new parametrization of the minimal seesaw model, expressing the heavysinglet neutrino Dirac Yukawa couplings (Yν)ij and Majorana masses MNi in terms of effective light-neutrino observables and an auxiliary Hermitian matrix H. In the minimal supersymmetric version of the seesaw model, the latter can be related directly to other lowenergy observables, including processes that violate charged lepton flavour and CP. This parametrization enables one to respect the stringent constraints on muon-number violation while studying the possible ranges for other observables by scanning over the allowed parameter space of the model. Conversely, if any of the lepton-flavour-violating process is observed, this measurement can be used directly to constrain (Yν)ij and MNi . As applications, we study flavour-violating τ decays and the electric dipole moments of leptons in the minimal supersymmetric seesaw model. CERN–TH/2002-126 June 2002
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