Multiple dark matter scenarios from ubiquitous stringy throats
Multiple dark matter scenarios from ubiquitous stringy throats
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DOI：
10.1103/physrevd.87.063522
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发表时间：
2012-11
影响因子：
5
通讯作者：
Diego Chialva;P. Dev;A. Mazumdar
中科院分区：
文献类型：
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作者：
Diego Chialva;P. Dev;A. Mazumdar
我们讨论了有多个卡鲁扎-克莱因（KK）暗物质候选者的可能性，这些候选者在一般的IIB型弦理论紧化方案中自然产生。这些暗物质候选者位于卡-丘流形的各个喉部。原则上，它们可以在四维空间中具有不同的质量范围，这取决于喉咙的层次弯曲。我们表明，宇宙学界和四维有效的理论描述的一致性对参数空间和几何的喉咙施加了很强的约束。与模型无关的方法，我们发现，质量尺度允许KK暗物质粒子在不同的喉咙可以在0.1 eV和10 TeV之间变化，这取决于喉咙的几何形状。因此，宇宙中可能同时存在不止一种冷（可能还有热和）暗物质成分。这种多暗物质的情况可能会削弱传统超对称暗物质候选者的束缚，也可能解释我们宇宙中额外的相对论自由度。
We discuss the possibility of having multiple Kaluza-Klein (KK) dark matter candidates which arise naturally in generic Type-IIB string theory compactification scenarios. These dark matter candidates reside in various throats of the Calabi-Yau manifold. In principle, they can come with varied range of masses in four-dimensions depending upon the hierarchical warping of the throats. We show that consistency with cosmological bounds and four-dimensional effective theory description imposes strong constraints on the parameter space and the geometry of the throats. With a rather model-independent approach, we find that the mass scales allowed for the KK dark matter particles in various throats can vary between 0.1 eV and 10 TeV, depending upon the throat geometry. Thus, there could be simultaneously more than one kind of cold (and possibly warm and hot) dark matter components residing in the Universe. This multiple dark matter scenario could weaken the bound on a conventional supersymmetric dark matter candidate and could also account for extra relativistic degrees of freedom in our Universe.