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arXiv 0902.4568hep-phastro-ph.HE
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非普适Gaugino质量模型中的混合中微子暗物质

Mixed Neutralino Dark Matter in Nonuniversal Gaugino Mass Models

Utpal Chattopadhyay, Debottam Das, D. P. Roy

摘要:

我们已经考虑了非普适的超引力的高更诺质量模型,产生于两个超场的混合物的规范动力学项的贡献,属于一个单线态和一个非单线态表示的大统一理论群。特别地,我们分析了两个模型,其中贡献的超场属于SU(5)的单线态和75维,以及单线态和200维表示。最轻的超粒子在第一种情况下是混合的bino-higgsino态,在第二种情况下是混合的bino-wino-higgsino态。在这两种情况下,我们都可以在参数空间的广阔区域内得到宇宙学上相容的暗物质遗迹密度。我们预测有希望的信号,在直接的暗物质探测实验,以及在间接探测实验中,通过高能量中微子来自他们的对湮灭在太阳。此外,我们发现有趣的$γ$ -射线的信号率,将在费米伽玛射线空间望远镜探测。我们还预计在这两种情况下,在大型强子对撞机有希望的对撞机信号。

英文摘要:

We have considered nonuniversal gaugino mass models of supergravity, arising from a mixture of two superfield contributions to the gauge kinetic term, belonging to a singlet and a nonsinglet representation of the GUT group. In particular we analyse two models, where the contributing superfields belong to the singlet and the 75-dimensional, and the singlet and the 200-dimensional representations of SU(5). The resulting lightest superparticle is a mixed bino-higgsino state in the first case and a mixed bino-wino-higgsino state in the second. In both cases one obtains cosmologically compatible dark matter relic density over broad regions of the parameter space. We predict promising signals in direct dark matter detection experiments as well as in indirect detection experiments via high energy neutrinos coming from their pair-annihilation in the Sun. Besides, we find interesting $γ$-ray signal rates that will be probed in the Fermi Gamma-ray Space Telescope. We also expect promising collider signals at LHC in both cases.

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