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arXiv 0804.3235astro-phhep-ph
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利用暗物质晕熵约束mSUGRA参数空间

Constraining the mSUGRA parameter space using the entropy of dark matter halos

Dario Nunez, Jesus Zavala, Lukas Nellen, Roberto A. Sussman, Luis G. Cabral-Rosetti, Myriam Mondragon

摘要:

我们推导出一个表达式的暗物质晕描述的Navarro-Frenk-White模型与核心的熵。将这个熵与暗物质在冻结期的熵进行比较,使我们能够约束mSUGRA模型中的参数空间。此外,加入这些约束与从通常的丰度标准,并要求这两个标准是一致的2 $σ$界限的暗物质的丰度:$0.112\leqΩ_{DM}h^2\leq0.122$,我们能够清楚地区分有效区域之间的值$\tan β$,mSUGRA模型的参数之一。我们发现,对于参数空间的探索区域,tan $β$的小值不受欢迎;只有tan $β\simeq50$的两个标准显着一致。在这两个标准是一致的区域中,我们还发现了一个较低的边界的中性伴子质量,$m_χ\geq 141$ GeV。

英文摘要:

We derive an expression for the entropy of a dark matter halo described by a Navarro-Frenk-White model with a core. The comparison of this entropy with the one of dark matter at the freeze-out era allows us to constraint the parameter space in mSUGRA models. Moreover, joining these constraints with the ones obtained from the usual abundance criteria and demanding both criteria to be consistent with the 2$σ$ bounds for the abundance of dark matter: $0.112\leqΩ_{DM}h^2\leq0.122$, we are able to clearly discriminate validity regions among the values of $\tan β$, one of the parameters of the mSUGRA model. We found that for the explored regions of the parameter space, small values of tan$β$ are not favored; only for tan$β\simeq50$ are both criteria significantly consistent. In the region where both criteria are consistent we also found a lower bound for the neutralino mass, $m_χ\geq 141$ GeV.

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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