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arXiv 0812.1067hep-ph
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超对称暗物质情况下中微子望远镜的STAU探测

Stau detection at neutrino telescopes in scenarios with supersymmetric dark matter

B. Canadas, D. G. Cerdeno, C. Munoz, S. Panda

摘要:

我们研究了在冰立方中微子望远镜上探测地球内部通过高能中微子的非弹性散射产生的长寿命态。在两种情况下计算了态通量的理论预测,其中长寿命态的存在与可行的超对称暗物质自然相关。也就是说,我们考虑的情况下,与superWIMP(引力子或轴子)和中性伴暗物质(沿共湮灭区)。在这两种情况下的最大值的stau通量原来是约1事件/年的地区与轻stau。这与轻引力子一致,其质量受到上限的限制,范围从0.2到15 GeV,取决于Stau质量。同样,它与质量约为1 GeV的轴子和100 GeV量级的非常低的再加热温度兼容。在中性伴子暗物质的情况下,这有利于具有低tan(β)值的区域,对于该区域,中性伴子-斯陶共湮灭区域在斯陶质量的较小值下发生。最后,我们研究的情况下,一般的超引力理论,并显示如何为特定的选择非通用的软参数的预测STAU通量可以适度增加。

英文摘要:

We have studied the detection of long-lived staus at the IceCube neutrino telescope, after their production inside the Earth through the inelastic scattering of high energy neutrinos. The theoretical predictions for the stau flux are calculated in two scenarios in which the presence of long-lived staus is naturally associated to viable supersymmetric dark matter. Namely, we consider the cases with superWIMP (gravitino or axino) and neutralino dark matter (along the coannihilation region). In both scenarios the maximum value of the stau flux turns out to be about 1 event/yr in regions with a light stau. This is consistent with light gravitinos, with masses constrained by an upper limit which ranges from 0.2 to 15 GeV, depending on the stau mass. Likewise, it is compatible with axinos with a mass of about 1 GeV and a very low reheating temperature of order 100 GeV. In the case of the neutralino dark matter this favours regions with a low value of tan(beta), for which the neutralino-stau coannihilation region occurs for smaller values of the stau mass. Finally, we study the case of a general supergravity theory and show how for specific choices of non-universal soft parameters the predicted stau flux can increase moderately.

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