论文标题
浓缩的暗物质与育川的互动
Condensed dark matter with a Yukawa interaction
论文作者
论文摘要
我们探讨了凝结的暗物质（DM）候选者的可能阶段，以Yukawa耦合到标量粒子的形式，在零温度下，但在有限密度下。该理论本质上仅取决于四个参数，即Yukawa耦合，费米亚质量，标量介体质量和DM密度。在低效率密度下，我们使用散射长度的概念来划定Bardeen-Cooper-Schrieffer（BCS），Bose-Einstein冷凝物（BEC）和交叉阶段，作为模型参数的函数。我们通过始终如一地包括诸如标量密度凝结物和超氟差距等新兴效应来进一步研究BCS阶段。在平均场近似中，我们得出了一致的差距方程组，保留了它们的动量依赖性，并且在非权威主义和相对论方案中均有效。我们向一组差距方程提出了数值解，特别是当介体质量比DM质量更大且更大时。最后，我们讨论了状态（EOS）的方程以及对非对称DM的可能含义。
We explore the possible phases of a condensed dark matter (DM) candidate taken to be in the form of a fermion with a Yukawa coupling to a scalar particle, at zero temperature but at finite density. This theory essentially depends on only four parameters, the Yukawa coupling, the fermion mass, the scalar mediator mass, and the DM density. At low fermion densities we delimit the Bardeen-Cooper-Schrieffer (BCS), Bose-Einstein Condensate (BEC) and crossover phases as a function of model parameters using the notion of scattering length. We further study the BCS phase by consistently including emergent effects such as the scalar density condensate and superfluid gaps. Within the mean field approximation, we derive the consistent set of gap equations, retaining their momentum dependence, and valid in both the non-relativistic and relativistic regimes. We present numerical solutions to the set of gap equations, in particular when the mediator mass is smaller and larger than the DM mass. Finally, we discuss the equation of state (EoS) and possible astrophysical implications for asymmetric DM.
