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arXiv 0906.0583hep-ph
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BMSSM有效理论中的中微子暗物质

Neutralino Dark Matter in BMSSM Effective Theory

Marcus Berg, Joakim Edsjo, Paolo Gondolo, Erik Lundstrom, Stefan Sjors

摘要:

我们研究热中性伴子暗物质的有效场论扩展的MSSM,称为“超越MSSM”(BMSSM)在Dine,Seiberg和Thomas(2007)。在这类有效场论中,MSSM的场内容是不变的,但通过允许对拉格朗日量的Higgs/higgsino部分进行小的修正,可以减轻小的层次问题。我们进行参数扫描并计算暗物质遗迹密度。光Higgsino LSP的情况下修改最多,我们发现新的区域的参数空间相比,标准的MSSM。这涉及到WMAP暗物质边界和LEP电荷束缚之间有趣的相互作用。我们还发现了一些变化的高吉诺LSP,部分是由于湮灭通过希格斯共振,部分是由于coannihilation与光停止在模型中,被统治的新的有效条款。

英文摘要:

We study thermal neutralino dark matter in an effective field theory extension of the MSSM, called "Beyond the MSSM" (BMSSM) in Dine, Seiberg and Thomas (2007). In this class of effective field theories, the field content of the MSSM is unchanged, but the little hierarchy problem is alleviated by allowing small corrections to the Higgs/higgsino part of the Lagrangian. We perform parameter scans and compute the dark matter relic density. The light Higgsino LSP scenario is modified the most; we find new regions of parameter space compared to the standard MSSM. This involves interesting interplay between the WMAP dark matter bounds and the LEP chargino bound. We also find some changes for gaugino LSPs, partly due to annihilation through a Higgs resonance, and partly due to coannihilation with light stops in models that are ruled in by the new effective terms.

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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