Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions
Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions
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DOI：
10.1007/jhep11(2014)048
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发表时间：
2014-08
影响因子：
5.4
通讯作者：
A. Abada;M. Krauss;W. Porod;F. Staub;A. Vicente;C. Weiland
中科院分区：
文献类型：
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作者：
A. Abada;M. Krauss;W. Porod;F. Staub;A. Vicente;C. Weiland
以超对称逆跷跷板机制作为中微子振荡数据的解释，我们研究了辐射和三体轻子衰变中的带电轻子味道破坏以及μ子原子中的无中微子μ−e转换。与以前的研究相比，我们考虑了所有可能的贡献：超对称和非超对称。我们采用类似 CMSSM 的边界条件作为软超对称破缺参数。我们发现几个区域存在不同贡献之间的抵消，与仅考虑主要贡献的情况相比，轻子风味违规率降低了一个数量级。这对于正确解释现有数据以及估计近期实验的范围尤其重要，其中灵敏度将提高一到两个数量级。此外，我们证明像 BR (τ→ 3μ)/BR (τ→ μe+ e−) 这样的比率可以用来确定超对称贡献是否优于 W± 和 H± 贡献，反之亦然。
Taking the supersymmetric inverse seesaw mechanism as the explanation for neutrino oscillation data, we investigate charged lepton flavor violation in radiative and 3-body lepton decays as well as in neutrinoless μ− e conversion in muonic atoms. In contrast to former studies, we take into account all possible contributions: supersymmetric as well as non-supersymmetric. We take CMSSM-like boundary conditions for the soft supersymmetry breaking parameters. We find several regions where cancellations between various contributions exist, reducing the lepton flavor violating rates by an order of magnitude compared to the case where only the dominant contribution is taken into account. This is in particular important for the correct interpretation of existing data as well as for estimating the reach of near future experiments where the sensitivity will be improved by one to two orders of magnitude. Moreover, we demonstrate that ratios like BR (τ→ 3μ)/BR (τ→ μe+ e−) can be used to determine whether the supersymmetric contributions dominate over the W±and H±contributions or vice versa.