Bino-Higgsino mixed dark matter in a focus point gaugino mediation
Bino-Higgsino mixed dark matter in a focus point gaugino mediation
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DOI：
10.1007/jhep11(2013)020
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发表时间：
2013-08
影响因子：
5.4
通讯作者：
T. Yanagida;N. Yokozaki
中科院分区：
文献类型：
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作者：
T. Yanagida;N. Yokozaki
本文研究了GeV引力伴子在焦点Gaugino中介模型中的中性伴子暗物质。具有相当大的希格斯诺分数的中性伴子的热遗迹丰度可以解释目前宇宙中的暗物质密度。自旋无关截面与XENON 100实验的当前上限略微一致，并且整个参数区域可以在XENON 1 T实验中覆盖。我们还讨论了在3/8左右的胶子质量与维诺质量之比的起源，这对于电弱对称性破缺扇区中的温和微调至关重要。结果表明，非反常的离散R-对称性的存在可以固定这个比例为3/8。
We investigate the neutralino dark matter in the focus point gaugino mediation model with theGeV gravitino. The thermal relic abundance of the neutralino with a sizable Higgsino fraction can explain the dark matter density at the present universe. The spin-independent cross section is marginally consistent with the current upper limit from the XENON 100 experiment, and the whole parameter region can be covered at the XENON1T experiment. We also discuss the origin of the gluino mass to wino mass ratio at around 3/8, which is crucial for the mild fine-tuning in the electroweak symmetry breaking sector. It is shown that the existence of the non-anomalous discrete R-symmetry can fix this ratio to 3/8.