Cosmology and Accelerator Tests of Strongly Interacting Dark Matter
Cosmology and Accelerator Tests of Strongly Interacting Dark Matter
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DOI：
10.1103/physrevd.97.055033
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发表时间：
2018-01
影响因子：
5
通讯作者：
A. Berlin;N. Blinov;S. Gori;P. Schuster;N. Toro
中科院分区：
文献类型：
--
作者：
A. Berlin;N. Blinov;S. Gori;P. Schuster;N. Toro
暗物质的一个自然可能性是它是由类似 QCD 的隐藏扇区的稳定介子组成的。现有文献很大程度上假设π介子的自相互作用单独控制着早期宇宙的宇宙学。我们指出，涉及矢量介子的过程通常主导着暗物质冻结的物理过程，并显着拓宽了这些模型的可行质量范围。矢量介子还会在加速器处产生引人注目的信号。例如，在大多数宇宙学青睐的参数空间中，矢量介子自然是长寿的，并在衰变中产生标准模型粒子。 HPS、SeaQuest 和 LDMX 等电子束和质子束固定目标实验可以利用这些信号来探索大部分可行的参数空间。我们还评论了之前考虑的一大类模型中固有的暗物质衰变，并解释了如何确保暗物质稳定性。
A natural possibility for dark matter is that it is composed of the stable pions of a QCD-like hidden sector. Existing literature largely assumes that pion self-interactions alone control the early universe cosmology. We point out that processes involving vector mesons typically dominate the physics of dark matter freeze-out and significantly widen the viable mass range for these models. The vector mesons also give rise to striking signals at accelerators. For example, in most of the cosmologically favored parameter space, the vector mesons are naturally long-lived and produce Standard Model particles in their decays. Electron and proton beam fixed-target experiments such as HPS, SeaQuest, and LDMX can exploit these signals to explore much of the viable parameter space. We also comment on dark matter decay inherent in a large class of previously considered models and explain how to ensure dark matter stability.