论文标题
重新加热期间的通过wimps
WIMPs during Reheating
论文作者
论文摘要
弱相互作用的大颗粒（WIMP）是最能动机的暗物质候选者之一。在通货膨胀重新加热结束后冻结发生的标准情况下，它们与严重的实验限制处于紧张状态。在这里，我们研究了在重新加热过程中发生的{\ it发生的wimp的热冷冻输出，而流动量$ ϕ $在通用的潜在$ \ propto ϕ^n $中相互振荡。根据$ n $的价值和充气衰减产品的自旋，辐射和充气能量密度的演变可以显示出不同的特征，因此，对wimps的冻结行为产生了相当大的影响。由于在重新加热过程中注入熵的结果，与观察到的DM遗物丰度兼容的参数空间被增大。特别是，在标准情况下，w imp热平均的歼灭横截面可以低几个幅度。最后，我们讨论了暗物质间接检测实验的当前界限，并探索未来的挑战和机遇。
Weakly Interacting Massive Particles (WIMPs) are among the best-motivated dark matter candidates. In the standard scenario where the freeze-out occurs well after the end of inflationary reheating, they are in tension with the severe experimental constraints. Here, we investigate the thermal freeze-out of WIMPs occurring {\it during} reheating, while the inflaton $ϕ$ coherently oscillates in a generic potential $\propto ϕ^n$. Depending on the value of $n$ and the spin of the inflaton decaying products, the evolution of the radiation and inflaton energy densities can show distinct features, therefore, having a considerable impact on the freeze-out behavior of WIMPs. As a result of the injection of entropy during reheating, the parameter space compatible with the observed DM relic abundance is enlarged. In particular, the WIMP thermally averaged annihilation cross-section can be several magnitudes lower than that in the standard case. Finally, we discuss the current bounds from dark matter indirect detection experiments, and explore future challenges and opportunities.
