论文标题
延迟衰减的暗物质：$ H_0 $ tension的约束和影响
Late-time decaying dark matter: constraints and implications for the $H_0$-tension
论文作者
论文摘要
我们使用最新的低红移探针来限制和更新腐烂的暗物质模型的寿命和寿命的边界。我们使用超新星型，重子振荡和重力透镜类星体的时间延迟测量。这些数据集与从宇宙微波背景中获得的早期宇宙先验相辅相成。对于相对论女儿粒子的最大允许部分，发现终生上的更新边界为$τ> 9 \，\ rm {gyr} $和$τ> 11 \，\ rm {gyr} $ at $ 95 \％$ c.l.，分别用于两种身体和许多身体衰减的情况。我们还评论了最近的提案，即目前的两体衰减暗物质模型可以与标准的$λ$ CDM模型相比，可以为$ H_0 $ - 张力提供分辨率。我们推断，当前的暗物质衰减场景不太可能减轻$ H_0 $ - 张力。我们发现，随着强烈的镜头数据集中观察到的镜头红移的增加，衰减的暗物质能够降低$ H_0 $值的趋势。
We constrain and update the bounds on the life-time of a decaying dark matter model with a warm massive daughter particle using the most recent low-redshift probes. We use Supernovae Type-Ia, Baryon Acoustic Oscillations and the time delay measurements of gravitationally lensed quasars. These data sets are complemented by the early universe priors taken from the Cosmic Microwave background. For the maximum allowed fraction of the relativistic daughter particle, the updated bounds on the life-time are found to be $τ> 9\, \rm{Gyr}$ and $τ>11\,\rm{Gyr}$ at $95\%$ C.L., for the two-body and many-body decay scenarios, respectively. We also comment on the recent proposal that the current two-body decaying dark matter model can provide resolution for the $H_0$-tension, by contrasting against the standard $Λ$CDM model. We infer that the current dark matter decaying scenario is unlikely to alleviate the $H_0$-tension. We find that the decaying dark matter is able to reduce the trend of the decreasing $H_0$ values with increasing lens redshifts observed in the strong lensing dataset.
