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arXiv 1211.5000hep-phhep-exnucl-ex
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具有轻中微子质量预测和主导无中微子双β衰变率的左右模型

Left-right models with light neutrino mass prediction and dominant neutrinoless double beta decay rate

M. K. Parida, Sudhanwa Patra

摘要:

在TeV尺度左右对称模型中,新的无中微子双β衰变和轻中微子质量的主导预言相互矛盾,因为后者通过流行的跷跷板机制有很大贡献。我们证明了在一类具有高尺度宇称恢复的左右模型中,这些结果与中微子振荡数据共存而不矛盾,并通过规范的反跷跷板机制得到了轻中微子质量的相关公式.对双β衰变最主要的贡献是通过$W^-_L- W^-_R$介导的,其中包括轻重中微子交换,模型预测可以区分Dirac中微子质量是否具有夸克-轻子对称起源,我们还讨论了相关的轻子味违反衰变.

英文摘要:

In TeV scale left-right symmetric models, new dominant predictions to neutrinoless double beta decay and light neutrino masses are in mutual contradiction because of large contribution to the latter through popular seesaw mechanisms. We show that in a class of left-right models with high-scale parity restoration, these results coexist without any contravention with neutrino oscillation data and the relevant formula for light neutrino masses is obtained via gauged inverse seesaw mechanism. The most dominant contribution to the double beta decay is shown to be via $W^-_L- W^-_R$ mediation involving both light and heavy neutrino exchanges, and the model predictions are found to discriminate whether the Dirac neutrino mass is of quark-lepton symmetric origin or without it. We also discuss associated lepton flavor violating decays.

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