来自带隙连续统的大质量引力子暗物质
Massive Graviton Dark Matter from a Gapped Continuum
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中文总结 AI 辅助
研究在带隙连续统的翘曲额外维度理论中暗物质的可能性，通过自能辐射修正研究大质量引力子共振作为暗物质候选体，还探讨其与膜上暴胀子的关系，同时确定引力子带隙连续统为全息暗物质，其产生与再加热温度有关。
中文摘要 AI 辅助
我们考虑在具有线性伸缩子背景的翘曲额外维度理论中，在膜世界宇宙学场景下存在带隙连续谱时暗物质的可能性。首先，由自能辐射修正引发，研究大质量引力子孤立共振的存在及其作为通过冻结机制产生的长寿命弱相互作用暗物质候选体的实现。该大质量引力子在亚兆电子伏特质量范围内满足所有理论和实验约束。还考虑了这种暗物质成分的存在与膜上暴胀子存在的紧密关系。其次，引力子的带隙连续统被确定为可充当全息暗物质的全息流体，其产生通过紫外冻结机制，丰度主要取决于再加热温度。根据质量间隙和再加热温度的值，可能存在一种或两种暗物质成分。
英文摘要
We consider the possibility of dark matter in a warped extra-dimensional theory in presence of a linear dilaton background, with a gapped continuum spectrum, in a brane-world cosmological scenario. Firstly, triggered by self-energy radiative corrections, we study the existence of an isolated resonance of massive gravitons, and its realization as a long-lived feebly interacting dark matter candidate, produced by the freeze-in mechanism. This massive graviton is proved to satisfy all theoretical and experimental constraints, in the sub-MeV mass range. We further consider the close relationship between the existence of this component of dark matter and the presence of an inflaton localized on the brane, with a mass around $10^{11}$ GeV and a sub-TeV reheating temperature, in a brane inflationary scenario that allows to reproduce the most recent cosmological observables. Secondly, the gapped continuum of gravitons, a particular five dimensional realization of the physics of unparticles, is identified as a holographic fluid which can play the role of holographic dark matter. The production of the holographic fluid goes by an ultra-violet freeze-in mechanism, with an abundance mainly depending on the reheating temperature. Depending on the values of the mass gap and the reheating temperature, one or both components of dark matter can be present.
