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暗核I：宇宙学与间接探测

Dark Nuclei I: Cosmology and Indirect Detection

William Detmold, Matthew McCullough, Andrew Pochinsky

备注：
31 pages, 9 figures
发表信息：
Phys. Rev. D 90, 115013 (2014)
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摘要：

在另一篇文章中，我们用格点场论方法证明了双色双味QCD中存在稳定的原子核态。作为复合暗物质的一个普遍研究的理论，这激发了在这个和其他复合暗区可能的核物理的考虑。在这项工作中，早期宇宙学和间接检测签名的对称和不对称的暗物质进行了探索，突出了暗核和相关的暗核过程的考虑所产生的独特功能。现今的暗物质丰度可能由暗核子和/或暗核组成，后者是通过暗核合成产生的。对于对称的暗物质，间接检测签名是可能的湮灭，暗核合成，暗核捕获，我们提出了一个新的解释银河系中心的伽马射线过剩的基础上后者。对于不对称的暗物质，暗核合成可能会改变恒星中暗物质的捕获，允许捕获的粒子被加工成核，并通过核心的暗核合成从恒星中喷出。值得注意的是，暗核合成实现了一种新的机制，用于间接检测来自银河系中心等区域的非对称暗物质的信号，而不必依赖于对称的暗物质成分。

英文摘要：

In a companion paper (to be presented), lattice field theory methods are used to show that in two-color, two-flavor QCD there are stable nuclear states in the spectrum. As a commonly studied theory of composite dark matter, this motivates the consideration of possible nuclear physics in this and other composite dark sectors. In this work, early Universe cosmology and indirect detection signatures are explored for both symmetric and asymmetric dark matter, highlighting the unique features that arise from considerations of dark nuclei and associated dark nuclear processes. The present day dark matter abundance may be composed of dark nucleons and/or dark nuclei, where the latter are generated through it dark nucleosynthesis. For symmetric dark matter, indirect detection signatures are possible from annihilation, dark nucleosynthesis, and dark nuclear capture and we present a novel explanation of the galactic center gamma ray excess based on the latter. For asymmetric dark matter, dark nucleosynthesis may alter the capture of dark matter in stars, allowing for captured particles to be processed into nuclei and ejected from the star through dark nucleosynthesis in the core. Notably, dark nucleosynthesis realizes a novel mechanism for indirect detection signals of asymmetric dark matter from regions such as the galactic center, without having to rely on a symmetric dark matter component.

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