论文标题
（非）标准宇宙学中热暗物质的单位性限制
Unitarity limits on thermal dark matter in (non-)standard cosmologies
论文作者
论文摘要
使用S-Matrix Unitarity暗示的非弹性反应横截面上的上限，我们得出了一般$ k \ rightarrow 2 $改变数字的反应的热平均最大暗物质（DM）灭绝率，具有$ K \ geq 2 $，以$ k \ geq 2 $发生在黑暗扇区，或者完全在暗区域，或涉及黑暗扇区，或涉及标准模型的模型。 This translates to a maximum mass of the particle saturating the observed DM abundance, which, for dominantly $s$-wave annihilations, is obtained to be around $130$ TeV, $1$ GeV, $7$ MeV and $110$ keV, for $k=2,3,4$ and $5$, respectively, in a radiation dominated Universe, for a real or complex scalar DM stabilized by a minimal symmetry.对于修改的热历史，在钉子前爆炸核合成时代，物质占主导地位中间，重新加热的值高于$ \ nathcal {o}（200）$ gev（$ k \ geq 4 $，$ k \ geq 4 $，$ \ mathcal {O}重新加热之前，对于DM冻结的单位性和DM遗物丰度的综合要求非常不满意。
Using the upper bound on the inelastic reaction cross-section implied by S-matrix unitarity, we derive the thermally averaged maximum dark matter (DM) annihilation rate for general $k \rightarrow 2$ number-changing reactions, with $k \geq 2$, taking place either entirely within the dark sector, or involving standard model fields. This translates to a maximum mass of the particle saturating the observed DM abundance, which, for dominantly $s$-wave annihilations, is obtained to be around $130$ TeV, $1$ GeV, $7$ MeV and $110$ keV, for $k=2,3,4$ and $5$, respectively, in a radiation dominated Universe, for a real or complex scalar DM stabilized by a minimal symmetry. For modified thermal histories in the pre-big bang nucleosynthesis era, with an intermediate period of matter domination, values of reheating temperature higher than $\mathcal{O}(200)$ GeV for $k \geq 4$, $\mathcal{O}(1)$ TeV for $k=3$ and $\mathcal{O}(50)$ TeV for $k=2$ are strongly disfavoured by the combined requirements of unitarity and DM relic abundance, for DM freeze-out before reheating.
