论文标题
较弱的量表过渡的热和沉重的暗物质
Hot and heavy dark matter from a weak scale phase transition
论文作者
论文摘要
我们指出，在具有快速气泡壁的相变（PT）中非绝热产生的暗物质会获得速度的提升，从而导致长时间的自由流长度。我们发现，可以通过抑制物质功率谱观察到的暗物质质量$ 10^8-10^9 $ GEV和PT的能量尺寸左右$ 10^{2} -10^3 $ GEV。 PT应发生在超冷态的边界，即大约在宇宙被真空占主导地位时。这项工作为银河系调查，Lyman-$α$，出色的流，镜头和21厘米观测提供了新颖的物理目标，并将其连接到此类相变的重力波，以及更具推测性的重力触发信号。
We point out that dark matter which is produced non-adiabatically in a phase transition (PT) with fast bubble walls receives a boost in velocity which leads to long free-streaming lengths. We find that this could be observed via the suppressed matter power spectrum for dark matter masses around $10^8 - 10^9$ GeV and energy scales of the PT around $10^{2} - 10^3$ GeV. The PT should take place at the border of the supercooled regime, i.e. approximately when the Universe becomes vacuum dominated. This work offers novel physics goals for galaxy surveys, Lyman-$α$, stellar stream, lensing, and 21-cm observations, and connects these to the gravitational waves from such phase transitions, and more speculatively to possible telescope signals of heavy dark matter decay.
