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arXiv 1609.02307hep-phastro-ph.CO
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剩余非阿贝尔暗物质和暗辐射

Residual Non-Abelian Dark Matter and Dark Radiation

P. Ko, Yong Tang

摘要:

提出了一个新的粒子物理模型,其中矢量暗物质(VDM)和暗辐射(DR)起源于同一个非阿贝尔暗扇区。我们给出了一个说明性的例子,其中黑暗的$SU(3)$自发地分裂成$SU(2)$子群的非零真空期望值的复标量的基本表示的$SU(3)$。无质量规范玻色子与剩余的未破碎的$SU(2)$组成DR,并有助于缓解$\textit{Planck}$和哈勃空间望远镜之间的哈勃常数测量的紧张局势。与此同时,与破碎的发生器相关的大质量暗规范玻色子是VDM候选者。这种非阿贝尔的VDM可以与宇宙背景中的非阿贝尔的DR相互作用,从而导致物质功率谱被抑制,并导致更小的$σ_8$用于结构形成。

英文摘要:

We propose a novel particle physics model in which vector dark matter (VDM) and dark radiation (DR) originate from the same non-Abelian dark sector. We show an illustrating example where dark $SU(3)$ is spontaneously broken into $SU(2)$ subgroup by the nonzero vacuum expectation value of a complex scalar in fundamental representation of $SU(3)$. The massless gauge bosons associated with the residual unbroken $SU(2)$ constitute DR and help to relieve the tension in Hubble constant measurements between $\textit{Planck}$ and Hubble Space Telescope. In the meantime, massive dark gauge bosons associated with the broken generators are VDM candidates. Intrinsically, this non-Abelian VDM can interact with non-Abelian DR in the cosmic background, which results in a suppressed matter power spectrum and leads to a smaller $σ_8$ for structure formation.

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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