Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-05
JHEP 1101:004,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, 17 figures. Version to be published in JHEP
Scientific paper
10.1007/JHEP01(2011)004
We survey the lepton flavor violation branching ratios Br(mu->e,gamma), Br(tau->mu,gamma), and Br(tau->e,gamma) 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.
Deppisch Frank F.
Plentinger Florian
Seidl Gerhart
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