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arXiv 1907.02541hep-ph
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轻子数破坏模型与中微子质量可忽略

Accessible Lepton-Number-Violating Models and Negligible Neutrino Masses

André de Gouvêa, Wei-Chih Huang, Johannes König, Manibrata Sen

摘要:

轻子数违反(LNV),一般来说,意味着非零马约拉纳质量的标准模型中微子。由于中微子质量非常小,对于LNV物理学的一般候选模型,几乎所有实验上可获得的LNV观测值的速率-除了无中微子的双β衰变-预计都非常小。指导有效运营商的考虑LNV现象,我们确定了一个完整的家庭的模型轻子数违反,但产生的马约拉纳中微子质量很小,即使新的物理尺度低于1 TeV。我们探讨这些模型的现象学,包括带电轻子味违反现象和重子数违反现象,确定的情况下,允许的$μ^-\to e^+$转换率在核中是潜在的访问下一代实验。

英文摘要:

Lepton-number violation (LNV), in general, implies nonzero Majorana masses for the Standard Model neutrinos. Since neutrino masses are very small, for generic candidate models of the physics responsible for LNV, the rates for almost all experimentally accessible LNV observables -- except for neutrinoless double-beta decay -- are expected to be exceedingly small. Guided by effective-operator considerations of LNV phenomena, we identify a complete family of models where lepton number is violated but the generated Majorana neutrino masses are tiny, even if the new-physics scale is below 1 TeV. We explore the phenomenology of these models, including charged-lepton flavor-violating phenomena and baryon-number-violating phenomena, identifying scenarios where the allowed rates for $μ^-\to e^+$-conversion in nuclei are potentially accessible to next-generation experiments.

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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