Cold dark matter hypotheses in the MSSM
Cold dark matter hypotheses in the MSSM
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DOI：
10.1016/j.physletb.2011.02.065
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发表时间：
2010-09
影响因子：
4.4
通讯作者：
Shehu S. Abdussalam;F. Quevedo
中科院分区：
文献类型：
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作者：
Shehu S. Abdussalam;F. Quevedo
我们在 R 宇称守恒 MSSM 中进行贝叶斯模型选择分析，以比较两种不同的假设：最轻的中子是否构成全部或仅部分冷暗物质。这对应于施加完整的 WMAP 遗迹密度限制或仅对应于约束 MSSM 参数的上限。我们考虑 MSSM 的几种实现，即三个 GUT 规模的 SUSY 破坏场景，其中包含与 CMSSM 相对应的少量参数、异常调解和大容量字符串场景，以及弱规模 25 参数现象学 MSSM (pMSSM)。结果为多组分冷暗物质提供了基于数据的定量证据。 pMSSM 后验样本表明，选择施加完整的 WMAP 限制或仅影响其上限，主要影响中性子的高吉诺-希格斯诺含量，与天真的预期相反，基本上不会影响任何其他部分。
We perform a Bayesian model selection analysis in the R-parity conserving MSSM to compare two different assumptions: whether the lightest neutralinos make all or only part of the cold dark matter. This corresponds to either imposing full WMAP relic density limits or just its upper bound for constraining the MSSM parameters. We consider several realisations of the MSSM, namely, three GUT-scale SUSY breaking scenarios with a handful of parameters corresponding to the CMSSM, anomaly mediation and the large volume string scenarios as well as the weak-scale 25-parameter phenomenological MSSM (pMSSM). The results give a data-based quantitative evidence for a multicomponent cold dark matter. The pMSSM posterior samples indicate that the choice of imposing full WMAP limits or just its upper bound affects mostly the gaugino–higgsino content of the neutralino and, against naive expectations, essentially not any other sector.