论文标题
僵尸碰撞的重型热文物
Heavy Thermal Relics from Zombie Collisions
论文作者
论文摘要
我们提出了一种新的热冻结机制，该机制导致超出数量级数量限制的一单位性的暗物质质量，而不会违反扰动单位性或修改标准宇宙学。确定遗物丰度的过程为$χζ^\匕首\至ζζ$，其中$χ$是暗物质的候选者。对于$m_ζ<m_χ<3m_ζ$，$χ$在宇宙学上是长寿的，并且散布在指数上更丰富的$ζ$。因此，这样的过程允许与经历普通$ 2 \ 2 $冻结的粒子相同的相互作用强度呈指数重的暗物质；或等效地，相同质量的相互作用呈指数弱的相互作用。我们在嗜血质暗物质模型中演示了这种机制，该模型允许深色物质质量高达$ 10^{9} $ GEV。
We propose a new thermal freezeout mechanism which results in dark matter masses exceeding the unitarity bound by many orders of magnitude, without violating perturbative unitarity or modifying the standard cosmology. The process determining the relic abundance is $χζ^\dagger \to ζζ$, where $χ$ is the dark matter candidate. For $ m_ζ< m_χ< 3 m_ζ$, $χ$ is cosmologically long-lived and scatters against the exponentially more abundant $ζ$. Therefore, such a process allows for exponentially heavier dark matter for the same interaction strength as a particle undergoing ordinary $2 \to 2$ freezeout; or equivalently, exponentially weaker interactions for the same mass. We demonstrate this mechanism in a leptophilic dark matter model, which allows for dark matter masses up to $10^{9}$ GeV.
