论文标题
边缘冻结21厘米信号的暗物质
Freeze-in dark matter in EDGES 21-cm signal
论文作者
论文摘要
边缘报道的氢21厘米信号温度的第一个测量极有利于冻干和重子流体之间的类似库仑的相互作用。我们在一个组分和两组式的情况下研究了这种暗物质，而轻力载体对于库仑样相互作用至关重要。使用相关实验和玻尔兹曼方程用来编码暗物质 - 巴里昂相互作用的效果的横截面的转换，我们表明，这两种情况都被Sub-GEV暗物质质量范围的严格恒星冷却边界牢固地排除。 The exclusion of one-component case applies to simplified freeze-in dark matter with the light force carrier as dark photon, gauged $B-L$, $L_{e}-L_μ$,$L_{e}-L_τ$ or axion-like particle, while the exclusion of two-component case applies to simplified freeze-in dark matter with the two light force carriers as two axion-like particles coupled to standard model quarks and瘦素分别。
The first measurement on temperature of hydrogen 21-cm signal reported by EDGES strongly favors Coulomb-like interaction between freeze-in dark matter and baryon fluid. We investigate such dark matter both in one- and two-component context, with the light force carrier(s) essential for the Coulomb-like interaction not being photon. Using a conversion of cross sections used by relevant experiments and Boltzmann equations to encode effects of the dark matter-baryon interaction, we show that both cases are robustly excluded by the stringent stellar cooling bounds in the sub-GeV dark matter mass range. The exclusion of one-component case applies to simplified freeze-in dark matter with the light force carrier as dark photon, gauged $B-L$, $L_{e}-L_μ$,$L_{e}-L_τ$ or axion-like particle, while the exclusion of two-component case applies to simplified freeze-in dark matter with the two light force carriers as two axion-like particles coupled to standard model quarks and leptons respectively.
