München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 21: Neutrinophysik (Theorie) 2

T 21.3: Talk

Friday, March 13, 2009, 14:30–14:45, M109

Lepton Flavor and CP Violation in mSUGRA — Frank Deppisch¹, •Florian Plentinger², Werner Porod², Reinhold Rückl², and Gerhart Seidl² — ¹School of Physics and Astronomy, University of Manchester, United Kingdom — ²Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Germany

We survey the lepton flavor violation decay rates Br(µ → e γ), Br(τ → µ γ), and Br(τ → e γ), in mSUGRA at the level of the fundamental Lagrangian for a broad class of non-trivial lepton mass matrices that give nearly tribimaximal lepton mixing. SUSY SU(5) GUT models with non-Abelian discrete flavor symmetries as feasible origin will be presented. Moreover, we study the lepton flavor violation branching ratios for the most general CP-violating forms of the mass matrices. We show that the branching ratios are roughly enhanced by an order of magnitude as compared to the real case. The branching ratios exhibit, however, a strong dependence on the choice of the phases. In particular, for general CP-phases, the LFV-rates appear to be largely uncorrelated with the possible high- and low-energy lepton mixing parameters.