论文标题
跳跃以相变开始黑暗部门
Jump Starting the Dark Sector with a Phase Transition
论文作者
论文摘要
我们研究通过相变填充黑暗扇区的可能性。我们将考虑由仪表理论，Randall-Sundrum场景和共同耦合基本颗粒制成的僻静黑暗部门。这些部门通常是该动作近似不变的事实，这意味着由于时间依赖的背景而产生的粒子产生得到了强烈抑制。特别是在通货膨胀期间没有发生重大产生，从而避免了CMB的强大等化限制。正如我们将显示的那样，如果与动态质量尺度相比，通货膨胀的量表很大，那么这些部门会自动进行相变，即在最简单的情况下，这些部门受哈勃参数控制。如果相变在再加热或辐射期间进行，则获得的丰度可能大于SM血浆的粒子产生和产生。对于在辐射统治期间完成的相变好的，预测DM质量在$ 10^8 $ GEV范围内，而在重新加热过程中发生的相变需要较大的值。
We study the possibility to populate the dark sector through a phase transition. We will consider secluded dark sectors made of gauge theories, Randall-Sundrum scenarios and conformally coupled elementary particles. These sectors have in common the fact that the action is approximately Weyl invariant, implying that particle production due to time dependent background is strongly suppressed. In particular no significant production takes place during inflation allowing to avoid strong isocurvature constraints from CMB. As we will show, if the scale of inflation is large compared to the dynamical mass scale, these sectors automatically undergo a phase transition that in the simplest cases is controlled by the Hubble parameter. If the phase transition takes place during reheating or radiation the abundance obtained can be larger than particle production and production from the SM plasma. For phase transitions completing during radiation domination, the DM mass is predicted in the range $10^8$ GeV while larger values are required for phase transitions occurring during reheating.
