Higgsino dark matter in a SUGRA model with nonuniversal gaugino masses
Higgsino dark matter in a SUGRA model with nonuniversal gaugino masses
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DOI：
10.1103/physrevd.68.033010
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发表时间：
2003-04
影响因子：
5
通讯作者：
U. Chattopadhyay;D. Roy
中科院分区：
文献类型：
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作者：
U. Chattopadhyay;D. Roy
在超对称暗物质背景下，我们研究了一种特殊的具有非普适高量子质量的SUGRA模型，作为最小SUGRA模型的替代方案。这个模型中最轻的超对称粒子原来是希格sino主导的，而不是b -ino主导的最轻的中性微子。这种希格西诺暗物质的热遗迹密度略低于宇宙学上的有利范围，这意味着它可能只是冷暗物质的次要成分。尽管如此，它预测了有利的间接探测率，这可以在平方公里大小的中微子望远镜中看到。
We study a specific SUGRA model with nonuniversal gaugino masses as an alternative to the minimal SUGRA model in the context of supersymmetric dark matter. The lightest supersymmetric particle in this model turns out to be a Higgsino-dominated instead of a B-ino-dominated lightest neutralino. The thermal relic density of this Higgsino dark matter is somewhat lower than the cosmologically favored range, which means that it may be only a subdominant component of cold dark matter. Nonetheless, it predicts favorable rates of indirect detection, which can be seen in square-km-size neutrino telescopes.