论文标题
微弱相互作用的巨大粒子的小型宇宙特征
Small-scale Cosmic Signatures of Feebly Interacting Massive Particles
论文作者
论文摘要
众所周知，即使是间接检测到的，相互作用的大量颗粒（FIMP）也应该很难间接地检测到。为了限制它们，我们通过调查其有关小规模结构形成的预测签名来得出通过标准模型字段提出的微弱理论的界限。为了实现这一目标，我们获得了通用维度$ \ ell $散射运算符的相位空间分布函数的分析近似。作为概念的证明，讨论了这种理论的实现，这些理论提供了可行的热演化，并能够牢固地解决$λ$ CDM宇宙学中出现的持久的小规模结构挑战。
Feebly Interacting Massive Particles (FIMPs), if they exist, should be notoriously difficult to detect even indirectly. In order to constrain them, we derive bounds for feeble theories sourced via Standard Model fields by investigating their predicted signatures regarding small-scale structure formation. To achieve this, we obtain an analytic approximation for the phase-space distribution function for a generic dimension $\ell$ scattering operator. As a proof of concept, realizations of such theories are discussed, which provide a viable thermal evolution and are able to solidly solve the enduring small-scale structure challenges appearing in $Λ$CDM cosmology.
