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arXiv 0905.3056hep-ph
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逆格式和线性seesaw格式中的A4-based三-双极大混合

A4-based tri-bimaximal mixing within inverse and linear seesaw schemes

M. Hirsch, S. Morisi, J. W. F. Valle

摘要:

我们认为三双极大轻子混合低尺度的跷跷板计划,轻中微子质量产生TeV尺度的物理,可能在大型强子对撞机(LHC)。两个例子被认为是基于A4味对称性内实现的逆或线性跷跷板机制。两者都是高度可预测的,因此在这两个轻中微子部门有效地只依赖于三个质量参数和一个马约拉纳阶段,没有CP破坏中微子振荡。我们发现线性跷跷板导致了无中微子双β衰变的下限,而反向跷跷板则没有。该模型还导致潜在的相当大的衰变率轻子味违反过程,密切相关的假设味对称性。

英文摘要:

We consider tri-bimaximal lepton mixing within low-scale seesaw schemes where light neutrino masses arise from TeV scale physics, potentially accessible at the Large Hadron Collider (LHC). Two examples are considered, based on the A4 flavor symmetry realized within the inverse or the linear seesaw mechanisms. Both are highly predictive so that in both the light neutrino sector effectively depends only on three mass parameters and one Majorana phase, with no CP violation in neutrino oscillations. We find that the linear seesaw leads to a lower bound for neutrinoless double beta decay while the inverse seesaw does not. The models also lead to potentially sizeable decay rates for lepton flavor violating processes, tightly related by the assumed flavor symmetry.

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