arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.02397hep-phastro-ph.CO
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暗希格斯暗物质

Dark Higgs Dark Matter

Cristina Mondino, Maxim Pospelov, Joshua T. Ruderman, Oren Slone

摘要:

一个新的$U(1)$暗规范群通过动力学混合入口耦合到标准模型(SM),以希格斯场$h_d$的形式提供了一个天然的暗物质候选者,负责产生暗光子$γ_d$的质量。我们发现,条件$m_{h_d}\leq m_{γ_d}$,连同小的动力学混合参数,$ε$,和/或暗规范耦合,$g_d$,导致暗希格斯粒子是足够的亚稳态构成暗物质。我们分析了宇宙的热历史,并表明,冻结,${\rm SM}\to \{γ_d, h_d\}$,冻结,$ \{γ_d, h_d\} \to {\rm SM}$,过程可以导致可行的暗希格斯暗物质与亚GeV的质量和动力学混合参数的范围内$10^{-13}\lesssimε\lesssim10^{-6}$。天体物理学和宇宙学中可观测到的信号包括原始元素丰度的改变、超新星爆炸能量的改变、宇宙晚期的暗希格斯衰变和暗物质自相互作用。

英文摘要:

A new $U(1)$ dark gauge group coupled to the Standard Model (SM) via the kinetic mixing portal provides a natural dark matter candidate in the form of the Higgs field, $h_d$, responsible for generating the mass of the dark photon, $γ_d$. We show that the condition $m_{h_d}\leq m_{γ_d}$, together with smallness of the kinetic mixing parameter, $ε$, and/or dark gauge coupling, $g_d$, leads the dark Higgs to be sufficiently metastable to constitute dark matter. We analyze the Universe's thermal history and show that both freeze-in, ${\rm SM}\to \{γ_d, h_d\}$, and freeze-out, $ \{γ_d, h_d\} \to {\rm SM}$, processes can lead to viable dark Higgs dark matter with a sub-GeV mass and a kinetic mixing parameter in the range $10^{-13}\lesssimε\lesssim10^{-6}$. Observable signals in astrophysics and cosmology include modifications to primordial elemental abundances, altered energetics of supernovae explosions, dark Higgs decays in the late Universe, and dark matter self-interactions.

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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