论文标题
无弹性狄拉克暗物质
Inelastic Dirac Dark Matter
论文作者
论文摘要
互动的热遗物有望有希望的候选暗物质。其中，无弹性暗物质的场景通过抑制弹性散射从原子核中进行了直接检测。我们介绍了非弹性狄拉克暗物质，这是一个新模型，其中有两个Dirac Fermions在MEV-GEV质量范围内。在微弱的耦合下，暗物质可以在冻结之前与标准型号偏离化学和动力学平衡。在这种情况下，冻结是由诸如coscatering之类的转换过程驱动的，而不是凝集。我们表明，非弹性狄拉克文物与宇宙学观察结果一致，特别是与核合成和宇宙微波背景。搜索在山脉和固定目标实验的黑暗部门又是非常敏感的探针。与严格限制的伪dirac场景相比，非弹性狄拉克暗物质为现有和即将进行的实验等实验提供了新的搜索目标，例如Belle II，Icarus，LDMX和Seaquest。
Feebly interacting thermal relics are promising dark matter candidates. Among them, scenarios of inelastic Dark Matter evade direct detection by suppressed elastic scattering off atomic nuclei. We introduce inelastic Dirac Dark Matter, a new model with two Dirac fermions in the MeV-GeV mass range. At feeble couplings, dark matter can depart from chemical as well as kinetic equilibrium with the Standard Model before freeze-out. In this case, the freeze-out is driven by conversion processes like coscattering, rather than coannihilation. We show that inelastic Dirac relics are consistent with cosmological observations, in particular with nucleosynthesis and the cosmic microwave background. Searches for dark sectors at colliders and fixed-target experiments, in turn, are very sensitive probes. Compared to the strongly constrained pseudo-Dirac scenario, inelastic Dirac Dark Matter offers a new search target for existing and upcoming experiments like Belle II, ICARUS, LDMX and SeaQuest.
