Dynamical dark matter: A new framework for dark-matter physics
Dynamical dark matter: A new framework for dark-matter physics
复制标题
动态暗物质：暗物质物理的新框架
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
B. Thomas
中科院分区：
文献类型：
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作者：
K. Dienes;B. Thomas
尽管关于宇宙中的暗物质还有很多未知之处，但有一个性质通常被认为是神圣不可侵犯的：暗物质必须在宇宙学时间尺度之外保持稳定。然而，最近提出了一个新的暗物质物理学框架，挑战了这一假设。在“动力学暗物质”（DDM）框架中，暗扇区由具有不同质量、寿命和宇宙学丰度的单个暗物质组成的巨大集合组成。此外，通常的稳定性要求被整个系综的寿命和宇宙学丰度之间的微妙平衡所取代。因此，DDM系综有可能与暗物质的所有实验和观测界限保持一致，同时产生超越传统暗物质候选者的集体行为。这些包括一个新的，非平凡的暗物质状态方程以及潜在的独特签名。
Although much remains unknown about the dark matter of the universe, one property is normally considered sacrosanct: dark matter must be stable well beyond cosmological time scales. However, a new framework for dark-matter physics has recently been proposed which challenges this assumption. In the "dynamical dark matter" (DDM) framework, the dark sector consists of a vast ensemble of individual dark-matter components with differing masses, lifetimes, and cosmological abundances. Moreover, the usual requirement of stability is replaced by a delicate balancing between lifetimes and cosmological abundances across the ensemble as a whole. As a result, it is possible for the DDM ensemble to remain consistent with all experimental and observational bounds on dark matter while nevertheless giving rise to collective behaviors which transcend those normally associated with traditional dark-matter candidates. These include a new, non-trivial darkmatter equation of state as well as potentially distinctive signatures...