Kination模型中的暗物质残留密度

摘要

Kination models predict the enhanced Hubble rate in the early universe.We investigate the relic density of Weakly Interacting Massive Particles (WIMPs) in the Kination models.We find an approximate analytic formula which can produce the relic particle abundance correctly.We demonstrate that our analytic formula gives the correct relic density,to an accuracy of about 0.3％ or better.%Kination模型预言早期宇宙中的哈勃参数的增强.我们讨论了Kination模型中的弱相互作用粒子的残留密度.在这个模型中我们找到了计算残留密度的较好的近似解析公式.我们的解析解所给出的残留密度与数值解的偏差为0.3％.