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arXiv 0902.3067hep-ph
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味对称性为A4的模型中的LFV和偶极矩

LFV and Dipole Moments in Models with A4 Flavour Symmetry

Luca Merlo

摘要:

本文分析了一类味对称性为A4 × Z3 × U(1)_FN的模型中轻子味违反跃迁、轻子磁偶极矩和电偶极矩的性质,这类模型的选择是由中微子振荡中的近似三双峰混合引起的.构造了一个低能有效拉格朗日量,其中这些效应由六维算子主导,由新物理的尺度M抑制。所有的破味效果都可以用一组真空度期望值来统一描述。两个单独的情况下,一个超对称和一般的,描述。得出了反应器角度的上限为百分之几的结论。

英文摘要:

It is presented an analysis on lepton flavour violating transitions, leptonic magnetic dipole moments and electric dipole moments in a class of models characterized by the flavour symmetry A4 x Z3 x U(1)_FN, whose choice is motivated by the approximate Tri-Bimaximal mixing observed in neutrino oscillations. A low-energy effective Lagrangian is constructed, where these effects are dominated by dimension six operators, suppressed by the scale M of new physics. All the flavour breaking effects are universally described by the vacuum expectation values of a set of spurions. Two separate cases, a supersymmetric and a general one, are described. An upper limit on the reactor angle of a few percent is concluded.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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