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arXiv 2007.08957hep-ph
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双组分暗物质的正则跷跷板蕴涵

Canonical seesaw implication for two-component dark matter

Phung Van Dong, Cao H. Nam, Duong Van Loi

摘要:

我们表明,规范的跷跷板机制实现的$U(1)_{B-L}$规范对称性提供了两个组件的暗物质自然。打破$B-L$的跷跷板标度定义了一个剩余规范对称性为$Z_6=Z_2\otimes Z_3$,其中$Z_2$导致通常的物质宇称,而$Z_3$是新发现的,它对夸克场进行了非平凡的变换。暗物质成分--分别在物质宇称和$Z_3$下进行非平凡的变换--可以获得任意质量,尽管$Z_3$暗物质可能比轻夸克$u,d$重。这种暗物质设置可以解决最近观察到的XENON 1 T异常和其他可观测量,假定暗物质质量接近简并,比电子和$B-L$规范玻色子$Z'$重,以及快速移动的$Z_3$暗物质具有大的$B-L$电荷,而$Z'$在束流收集器实验敏感区以下是可行的。

英文摘要:

We show that the canonical seesaw mechanism implemented by the $U(1)_{B-L}$ gauge symmetry provides two-component dark matter naturally. The seesaw scale that breaks $B-L$ defines a residual gauge symmetry to be $Z_6=Z_2\otimes Z_3$, where $Z_2$ leads to the usual matter parity, while $Z_3$ is newly recognized, transforming quark fields nontrivially. The dark matter components -- that transform nontrivially under the matter parity and $Z_3$, respectively -- can gain arbitrary masses, despite the fact that the $Z_3$ dark matter may be heavier than the light quarks $u,d$. This dark matter setup can address the XENON1T anomaly recently observed and other observables, given that the dark matter masses are nearly degenerate, heavier than the electron and the $B-L$ gauge boson $Z'$, as well as the fast-moving $Z_3$ dark matter has a large $B-L$ charge, while the $Z'$ is viably below the beam dump experiment sensitive regime.

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