Lepton Flavour Violating τ Decays in the Left-Right Symmetric Model
Lepton Flavour Violating τ Decays in the Left-Right Symmetric Model
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DOI：
10.1103/physrevd.76.013004
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发表时间：
2006-10
影响因子：
5
通讯作者：
A. Akeroyd;M. Aoki;Y. Okada
中科院分区：
文献类型：
--
作者：
A. Akeroyd;M. Aoki;Y. Okada
标准模型的左右对称扩展与希格斯同位旋三重态可以提供中微子质量通过TeV尺度的跷跷板机制。双荷Higgs玻色子H ±± L和H ±± R通过与Maki-Nakagawa-Sakata矩阵（VMNS）相关的耦合，在树水平上诱导轻子味破坏衰变τ ± → 111.我们研究了τ ± → lll和μ → ey的大小和相关性，并对V MNS中大混合的起源作了特定的假设，同时考虑了μ → ε的严格界。结果还表明，τ ± → lll的角不对称性对H ±± L和H ±± R介导贡献的相对强度敏感，并提供了一种区分双荷Higgs玻色子模型的方法。
The left-right symmetric extension of the standard model with Higgs isospin triplets can provide neutrino masses via a TeV scale seesaw mechanism. The doubly charged Higgs bosons H ±± L and H ±± R induce lepton flavor violating decays τ ± → lll at tree level via a coupling which is related to the Maki-Nakagawa-Sakata matrix (V MNS ). We study the magnitude and correlation of τ ± → lll and μ → ey with specific assumptions for the origin of the large mixing in V MNS while respecting the stringent bound for μ → eee. It is also shown that an angular asymmetry for τ ± → lll is sensitive to the relative strength of the H ±± L and H ±± R mediated contributions and provides a means of distinguishing models with doubly charged Higgs bosons.