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arXiv 2409.09008hep-phastro-ph.CO
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来自规范U(1)对称性的手征暗物质与辐射中微子质量

Chiral dark matter and radiative neutrino masses from gauged U(1) symmetry

K. S. Babu, Shreyashi Chakdar, Vishnu P. K

AI总结:

本文提出一类基于手征U(1)规范对称性的暗物质模型,识别出38个可行模型,并展示其通过scotogenic机制辐射产生中微子质量的能力,同时验证了最简单模型与暗物质遗迹密度及直接探测实验约束的相容性。

摘要:

我们提出一类基于作用于暗扇区的手征$U(1)$规范对称性的暗物质模型。该手征$U(1)$保护暗扇区费米子的质量,并借助未破缺的离散$\mathcal{Z}_N$规范对称性保证暗物质粒子的稳定性。我们识别出38个此类$U(1)$模型,它们是手征$SU(3) \times SU(2)$规范对称性的后代,由具有简单$U(1)$荷分配的最小费米子集合构成。我们展示了如何利用这些模型通过scotogenic机制辐射性地产生微小的Majorana中微子质量,其中暗扇区粒子在圈图中循环传播。我们进一步探索了此类中最简单模型的现象学,该模型允许Majorana费米子、Dirac费米子或标量场作为暗物质候选者,并展示了各种情景与来自遗迹密度和直接探测实验约束的一致性。

英文摘要:

We propose a class of dark matter models based on a chiral $U(1)$ gauge symmetry acting on a dark sector. The chiral $U(1)$ protects the masses of the dark sector fermions, and also guarantees the stability of the dark matter particle by virtue of an unbroken discrete $\mathcal{Z}_N$ gauge symmetry. We identify 38 such $U(1)$ models which are descendants of a chiral $SU(3) \times SU(2)$ gauge symmetry, consisting of a minimal set of fermions with simple $U(1)$ charge assignments. We show how these models can also be utilized to generate small Majorana neutrino masses radiatively via the scotogenic mechanism with the dark sector particles circulating inside loop diagrams. We further explore the phenomenology of the simplest model in this class, which admits a Majorana fermion, Dirac fermion or a scalar field to be the dark matter candidate, and show the consistency of various scenarios with constraints from relic density and direct detection 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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