论文标题
精确的WIMP暗物质丰度和标准模型热力学
Precise WIMP Dark Matter Abundance and Standard Model Thermodynamics
论文作者
论文摘要
弱相互作用的大粒子（WIMP）是暗物质的主要候选者。 WIMP暗物质丰度取决于冻结机制。一旦我们知道了wimp粒子的特性，例如质量和相互作用，我们就可以预测深色物质的丰度。但是，估计w imp暗物质的丰度有几种不确定性。在这项工作中，我们专注于标准模型热力学的效果。我们重新审查了由于标准模型中的状态方程（EOS）而引起的WIMP暗物质丰度及其不确定性的估计。我们在早期宇宙中采用了标准模型的EOS的最新估计，与EOS的常规估计值相比，1-1000 GEV暗物质丰度差异近10％。
A weakly interacting massive particle (WIMP) is a leading candidate of the dark matter. The WIMP dark matter abundance is determined by the freeze-out mechanism. Once we know the property of the WIMP particle such as the mass and interaction, we can predict the dark matter abundance. There are, however, several uncertainties in the estimation of the WIMP dark matter abundance. In this work, we focus on the effect from Standard Model thermodynamics. We revisit the estimation of the WIMP dark matter abundance and its uncertainty due to the equation of state (EOS) in the Standard Model. We adopt the up-to-date estimate of the EOS of the Standard Model in the early Universe and find nearly 10% difference in the 1-1000 GeV dark matter abundance, compared to the conventional estimate of the EOS.
