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arXiv 1010.2172hep-ph
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遗迹密度,包括MSSM中的索末菲增强

Relic densities including Sommerfeld enhancements in the MSSM

Andrzej Hryczuk, Roberto Iengo, Piero Ullio

摘要:

我们已经开发了一个通用的形式主义计算索末菲增强(SE)因子的多状态系统的费米子,在所有可能的自旋配置和通用的长程相互作用。我们展示了如何包括这样的SE效应在一个精确的计算的热遗迹密度的WIMP暗物质候选人。我们应用该方法的MSSM和执行的任意组成的中性伴子的遗迹丰度的数值研究,包括SE由于交换的W和Z玻色子,光子和Higgses。我们发现,遗迹密度可以抑制的几个因素在一个seizable区域的参数空间,主要是Wino类中性伴子的质量为几个TeV的,并高达一个数量级接近共振。

英文摘要:

We have developed a general formalism to compute Sommerfeld enhancement (SE) factors for a multi-state system of fermions, in all possible spin configurations and with generic long-range interactions. We show how to include such SE effects in an accurate calculation of the thermal relic density for WIMP dark matter candidates. We apply the method to the MSSM and perform a numerical study of the relic abundance of neutralinos with arbitrary composition and including the SE due to the exchange of the W and Z bosons, photons and Higgses. We find that the relic density can be suppressed by a factor of a few in a seizable region of the parameter space, mostly for Wino-like neutralino with mass of a few TeV, and up to an order of magnitude close to a resonance.

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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