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arXiv 1111.4364astro-ph.COhep-ph
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自相互作用暗物质的极限

Limits on Self-Interacting Dark Matter

Chris Kouvaris

摘要:

基于对附近老中子星的观测,我们对费米子非对称暗物质的自相互作用施加了新的严格约束。由汤川型相互作用介导的WIMP自相互作用可以显著降低中子星中积累的WIMP粒子数发生引力坍缩所需的WIMP粒子数。即使是位于低暗物质密度区域附近的中子星,也可以吸积足够数量的WIMP,这些WIMP可能会坍缩,形成一个迷你黑洞,并摧毁宿主恒星。在此基础上,我们推导出WIMP自相互作用的约束条件,在某些情况下比子弹簇(目前被认为是最严格的)严格几个数量级。

英文摘要:

We impose new severe constraints on the self-interactions of fermionic asymmetric dark matter based on observations of nearby old neutron stars. WIMP self-interactions mediated by Yukawa- type interactions can lower significantly the number of WIMPs necessary for gravitational collapse of the WIMP population accumulated in a neutron star. Even nearby neutron stars located at regions of low dark matter density can accrete sufficient number of WIMPs that can potentially collapse, form a mini black hole, and destroy the host star. Based on this, we derive constraints on the WIMP self-interactions which in some cases are by several orders of magnitude stricter than the ones from the bullet cluster (which are currently considered the most stringent).

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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