Lepton flavor violation in complex SUSY seesaw models with nearly tribimaximal mixing

  • Frank F. Deppisch
  • Florian Plentinger
  • Gerhart Seidl


We survey the lepton flavor violation branching ratios Br(μ), Br(τμγ), and Br(τ) in mSUGRA for a broad class of lepton mass matrix textures that give nearly tribimaximal lepton mixing. Small neutrino masses are generated by the type-I seesaw mechanism with non-degenerate right-handed neutrino masses. The textures exhibit a hierarchical mass pattern and can be understood from flavor models giving rise to large leptonic mixing. We study the branching ratios for the most general CP-violating forms of the textures. It is demonstrated that the branching ratios can be enhanced by 2-3 orders of magnitude as compared to the CP-conserving case. The branching ratios exhibit, however, a strong dependence on the choice of the phases in the Lagrangian which affects the significance of flavor models. In particular, for general CP-phases, the lepton flavor violating rates appear to be essentially uncorrelated with the possible high-and low-energy lepton mixing parameters, such as the reactor angle.


Rare Decays Neutrino Physics Supersymmetric Standard Model Beyond Standard Model 


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Copyright information

© SISSA, Trieste, Italy 2011

Authors and Affiliations

  • Frank F. Deppisch
    • 1
  • Florian Plentinger
    • 2
  • Gerhart Seidl
    • 3
  1. 1.School of Physics and AstronomyUniversity of ManchesterManchesterUnited Kingdom
  2. 2.SISSA and INFN-Sezione di TriesteTriesteItaly
  3. 3.Institut für Theoretische Physik und AstrophysikUniversität WürzburgWürzburgGermany

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