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arXiv 1903.10552hep-ph
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中微子质量模型:新的分类和与模型无关的尺度上限

Neutrino mass models: New classification and model-independent upper limits on their scale

Juan Herrero-Garcia, Michael A. Schmidt

摘要:

我们提出了一个独立于模型的框架来分类和研究中微子质量模型及其唯象。其思想是在标准模型之外引入一个与轻子耦合并携带轻子数的粒子,以及一个与轻子数相差两个单位并包含该粒子的算符。这允许研究不违反轻子数的过程,同时仍然使用有效场论。对中微子质量的贡献转化为新粒子质量的一个强大的上限。我们比较它的强大,但不太强大的上限从希格斯自然,并讨论了几个下界。我们的框架允许分类中微子质量模型在\emph{just} 20类,进一步减少到14一旦核子衰变极限考虑在内,和\emph{possibly} 9,如果还考虑希格斯自然性的考虑和直接搜索。

英文摘要:

We propose a model-independent framework to classify and study neutrino mass models and their phenomenology. The idea is to introduce one particle beyond the Standard Model which couples to leptons and carries lepton number together with an operator which violates lepton number by two units and contains this particle. This allows to study processes which do not violate lepton number, while still working with an effective field theory. The contribution to neutrino masses translates to a robust upper bound on the mass of the new particle. We compare it to the stronger but less robust upper bound from Higgs naturalness and discuss several lower bounds. Our framework allows to classify neutrino mass models in \emph{just} 20 categories, further reduced to 14 once nucleon decay limits are taken into account, and \emph{possibly} to 9 if also Higgs naturalness considerations and direct searches are considered.

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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