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arXiv 1002.1646hep-phastro-ph.CO
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标准模型自然超对称扩展中的暗物质

Dark matter in natural supersymmetric extensions of the Standard Model

Francesc Ferrer, Christopher Spitzer

摘要:

我们探讨的最小超对称标准模型(MSSM),可以提供一个很好的适合PAMELA宇宙射线正电子过剩的扩展中的暗物质部门,而在同一时间解决的小层次问题的MSSM。添加一个单重态希格斯超场,S,可以解释观察到的正电子过剩,最近在文献中讨论,但我们指出,它需要一个微调的选择模型的参数。我们发现,包括一个额外的单线态允许减少弱尺度微调,和解释宇宙射线观测的暗物质湮灭在星系晕。我们的设置包含一个轻轴子,但不需要光CP-甚至标量的频谱。

英文摘要:

We explore the dark matter sector in extensions of the Minimal Supersymmetric Standard Model (MSSM) that can provide a good fit to the PAMELA cosmic ray positron excess, while at the same time addressing the little hierarchy problem of the MSSM. Adding a singlet Higgs superfield, S, can account for the observed positron excess, as recently discussed in the literature, but we point out that it requires a fine-tuned choice for the parameters of the model. We find that including an additional singlet allows both a reduction of the weak-scale fine-tuning, and an interpretation of the cosmic ray observations in terms of dark matter annihilations in the galactic halo. Our setup contains a light axion, but does not require light CP-even scalars in the spectrum.

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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