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arXiv 1901.06402hep-ph
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暗生暗对称作为标准模型对称的一个剩余子群

Scotogenic Dark Symmetry as a residual subgroup of Standard Model Symmetries

Salvador Centelles Chuliá, Ricardo Cepedello, Eduardo Peinado, Rahul Srivastava

摘要:

我们发现,暗生暗对称性可以作为一个剩余的分组已经存在于标准模型的全球$U(1)_{B-L}$对称性。我们提出了一个一般的框架,其中的$U(1)_{B-L}$对称性自发破缺,甚至$\mathcal{Z}_{2n}$子群,设置中微子马约拉纳和暗物质的稳定性方面的剩余$\mathcal{Z}_{2n}$的一般条件。在这个一般框架下,作为例子,我们建立了一类简单的模型,在暗物质的精神,暗物质候选人是最轻的粒子内运行的中微子质量环。在我们的框架中的全局$U(1)_{B-L}$对称性是无异常的,也可以以直接的方式测量,从而导致更丰富的现象学。

英文摘要:

We show that the scotogenic dark symmetry can be obtained as a residual subgroup of the global $U(1)_{B-L}$ symmetry already present in Standard Model. We propose a general framework where the $U(1)_{B-L}$ symmetry is spontaneously broken to an even $\mathcal{Z}_{2n}$ subgroup, setting the general conditions for neutrinos to be Majorana and the dark matter stability in terms of the residual $\mathcal{Z}_{2n}$. Under this general framework, as examples, we build a class of simple models where, in the scotogenic spirit, the dark matter candidate is the lightest particle running inside the neutrino mass loop. The global $U(1)_{B-L}$ symmetry in our framework being anomaly free can also be gauged in a straightforward manner leading to a richer phenomenology.

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