论文标题
隐形腐烂的自旋1暗物质
Stealth decaying spin-1 dark matter
论文作者
论文摘要
我们考虑了衰减的自旋-1暗物质的模型，其主要耦合与标准模型扇区的主要耦合是通过深色纤维Yukawa Portal将TEV尺度矢量样的Lepton连接到标准模型（右手）电子。在电子峰值阈值的下方，暗物质的较慢，被环抑制的衰减对光子和（电子）中微子，并且在宇宙学的时间尺度上稳定，以实现足够小的量规耦合值。它的遗物丰度是通过冻结机制通过平衡的深色Lepton腐烂来设定的。我们表明，该模型适应其参数的自然价值观察到的暗物质丰度和〜5keV至1MEV范围内的暗物质质量，同时从直接检测，间接检测，出色的冷却和宇宙学中避免约束。我们还考虑了与标准模型超负荷场进行非零量规动力学混合的可能性，该模型被发现对模型的现象学产生了轻微的影响。
We consider models of decaying spin-1 dark matter whose dominant coupling to the standard model sector is through a dark-Higgs Yukawa portal connecting a TeV-scale vector-like lepton to the standard model (right-handed) electron. Below the electron-positron threshold, dark matter has very slow, loop-suppressed decays to photons and (electron) neutrinos, and is stable on cosmological time-scale for sufficiently small gauge coupling values. Its relic abundance is set by in-equilibrium dark lepton decays, through the freeze-in mechanism. We show that this model accommodates the observed dark matter abundance for natural values of its parameters and a dark matter mass in the ~5keV to 1MeV range, while evading constraints from direct detection, indirect detection, stellar cooling and cosmology. We also consider the possibility of a nonzero gauge kinetic mixing with the standard model hypercharge field, which is found to yield a mild impact on the model's phenomenology.
