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arXiv 2103.09827hep-phastro-ph.CO
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暗物质的热挤压

Thermal Squeezeout of Dark Matter

Pouya Asadi, Eric David Kramer, Eric Kuflik, Gregory W. Ridgway, Tracy R. Slatyer, Juri Smirnov

摘要:

本文详细研究了含$SU(N)$规范群和单代暗重夸克的暗扇区中的禁闭相变。我们把重点放在足够重的夸克,使他们的丰度冻结之前的相变和相变是一级的。我们发现,在这个相变的夸克被困在收缩口袋的退禁闭阶段,并压缩到足以在一个显着的速度相互作用,从而产生了第二阶段的湮灭,可以显着地改变所产生的暗物质丰度。因此,暗物质可能比经常被引用的$\sim100~$ TeV的幺正性边界更重。我们的发现几乎完全独立于暗区和标准模型之间入口的细节。我们简要地评论了这样一个部门的可能信号。我们的主要发现总结在一封附函中,而在这里,我们提供了计算的不同部分的进一步细节。

英文摘要:

We carry out a detailed study of the confinement phase transition in a dark sector with a $SU(N)$ gauge group and a single generation of dark heavy quark. We focus on heavy enough quarks such that their abundance freezes out before the phase transition and the phase transition is of first-order. We find that during this phase transition the quarks are trapped inside contracting pockets of the deconfined phase and are compressed enough to interact at a significant rate, giving rise to a second stage of annihilation that can dramatically change the resulting dark matter abundance. As a result, the dark matter can be heavier than the often-quoted unitarity bound of $\sim100~$TeV. Our findings are almost completely independent of the details of the portal between the dark sector and the Standard Model. We comment briefly on possible signals of such a sector. Our main findings are summarized in a companion letter, while here we provide further details on different parts of the calculation.

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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