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arXiv 2109.02670hep-phgr-qchep-th
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暗物质的超维模型

An Extra-Dimensional Model of Dark Matter

S. Girmohanta, R. Shrock

摘要:

我们提出了一个具有额外空间维度的暗物质模型,其中标准模型(SM)费米子具有局域化的波函数。其基础规范群是$G_{\rm SM} \otimes {\rm U}(1)_z$,而暗物质粒子是SM单线态狄拉克费米子$χ$,它在${\rm U}(1)_z$规范对称性下带电。我们表明,传统的智慧,狄拉克费米子的质量自然是在紫外截止尺度不持有在这个模型。我们进一步证明,该模型产生的暗物质遗迹丰度与观测一致,并讨论了直接和间接搜索暗物质的限制。暗物质粒子与物质的相互作用很弱,并且具有可忽略的小自相互作用。用$m_χ$在多TeV范围内得到了与宇宙学观测和实验暗物质搜索数据的非常好的拟合。讨论给出的观测签名和实验测试的模型。

英文摘要:

We present a model for dark matter with extra spatial dimensions in which Standard-Model (SM) fermions have localized wave functions. The underlying gauge group is $G_{\rm SM} \otimes {\rm U}(1)_z$, and the dark matter particle is a SM-singlet Dirac fermion, $χ$, which is charged under the ${\rm U}(1)_z$ gauge symmetry. We show that the conventional wisdom that the mass of a Dirac fermion is naturally at the ultraviolet cutoff scale does not hold in this model. We further demonstrate that this model yields a dark matter relic abundance in agreement with observation and discuss constraints from direct and indirect searches for dark matter. The dark matter particle interacts weakly with matter and has negligibly small self-interactions. Very good fits to data from cosmological observations and experimental dark matter searches are obtained with $m_χ$ in the multi-TeV range. A discussion is given of observational signatures and experimental tests of the 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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