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arXiv 2007.05845hep-ph
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中微子质量和暗物质的自然暗生模型

A Natural Scotogenic Model for Neutrino Mass \& Dark Matter

Amine Ahriche, Adil Jueid, Salah Nasri

摘要:

在这封信中,我们提出了一个扩展的暗生模型,单态Majorana粒子可以是暗物质(DM),而不需要一个高度抑制的标量耦合的顺序$O(10^{-10})$。为此,SM被扩展为三个单态马约拉纳费米子、一个惰性纯量双重态和两个(一个复态和一个实态)单态纯量,具有全局$Z_{4}$对称性,该对称性以比电弱对称性高出复单态纯量vev的尺度自发破缺为$Z_{2}$。在这种设置中,中微子质量的小是通过三个图之间的取消一个暗生,一个DM候选人,是可行的大质量范围内实现的;和现象比最小暗生模型更丰富。

英文摘要:

In this letter, we propose an extension of the scotogenic model where singlet Majorana particle can be dark matter (DM) without the need of a highly suppressed scalar coupling of the order $O(10^{-10})$. For that, the SM is extended with three singlet Majorana fermions, an inert scalar doublet, and two (a complex and a real) singlet scalars, with a global $Z_{4}$ symmetry that is spontaneously broken into $Z_{2}$ at a scale higher than the electroweak one by the vev of the complex singlet scalar. In this setup, the smallness of neutrino mass is achieved via the cancellation between three diagrams a la scotogenic, a DM candidate that is viable for a large mass range; and the phenomenology is richer than the minimal scotogenic model.

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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