Lepton flavor violation in complex SUSY seesaw models with nearly tribimaximal mixing
Lepton flavor violation in complex SUSY seesaw models with nearly tribimaximal mixing
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DOI：
10.1007/jhep01(2011)004
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发表时间：
2010-11
影响因子：
5.4
通讯作者：
F. Deppisch;F. Plentinger;G. Seidl
中科院分区：
文献类型：
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作者：
F. Deppisch;F. Plentinger;G. Seidl
我们研究了mSUGRA中轻子风味违背分支比Br (μ→γ), Br （τ→μγ）和Br (τ→γ)，这些轻子质量矩阵织构具有近三极大轻子混合。小中微子质量是由i型跷跷板机制产生的，具有非简并的右手中微子质量。这些结构呈现出分层质量模式，可以从产生大轻子混合的风味模型来理解。我们研究了最一般的违背cp的织构形式的分支比。结果表明，与保留cp的情况相比，分支比可以提高2-3个数量级。然而，分支比表现出强烈的依赖于拉格朗日相的选择，这影响了风味模型的意义。特别是，对于一般cp相，轻子风味破坏率似乎与可能的高能量和低能轻子混合参数（如反应器角度）基本无关。
We survey the lepton flavor violation branching ratios Br (μ→ eγ), Br (τ→ μγ), and Br (τ→ eγ) 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.