论文标题
由于一阶electroweak相过渡而导致的暗物质液体丰度稀释
Dilution of Dark Matter Relic abundance due to First Order Electroweak Phase Transition
论文作者
论文摘要
我们调查了一阶电子期过渡（FOEWPT）的影响，这是电子eak baryogenopen的先决条件之一，对暗物质（DM）的热元素丰度（DM）在复杂的单元量表中的阶段过渡发生之前冻结的热物质（DM），可以提供$ Z_3 $ -INVARIANT todmult tymeS-Invariant类型模型，该模型可以使其同样，该模型构成了一个模型，该模型既可以说明宇宙的非逐渐中微子肿块和重子不对称。由于熵的释放，尤其是对于TEV尺度的DM，围绕电动量表周围的这种相变会对遗物密度产生影响。因此，我们专注于所述模型的参数空间区域，该区域有利于早期宇宙中的泡沫，并且DM很重，因此其冻结温度的温度比相变温度大。我们进一步研究了DM遗物密度稀释因子对模型参数，成核温度，强度和相变的持续时间的依赖性。这样的稀释可能会检索一些参数空间的区域，这些区域以前被DM遗物密度的测量值和/或DM直接检测实验的最新约束所排除。此外，由于FOEWPT的结果，在稀释因子和随机重力波的产生之间达到了直接连接。
We investigate the effect of a first-order electroweak phase transition (FOEWPT), which is one of the prerequisites for electroweak baryogenesis, on the thermal relic abundance of the dark matter (DM) that freezes out before the occurrence of the phase transition in the complex singlet scalar extended $Z_3$-invariant type-II seesaw model that can simultaneously provide a DM candidate, explain the non-vanishing neutrino masses and the baryon asymmetry of the Universe. Such a phase transition around the electroweak scale leaves an impact on the relic density due to the release of entropy, particularly for a TeV-scale DM. We thus concentrate on the region of parameter space of the said model, which favors an FOEWPT in the early Universe and for which the DM is heavy such that its freeze-out temperature turns out to be larger than the phase transition temperature. We further study the dependencies of the dilution factor of the DM relic density on the model parameters, the nucleation temperature, the strength and the duration of the phase transition. Such a dilution might retrieve some of the regions of parameter space that were previously ruled out by the measured value of the DM relic density and/or the latest constraints from the DM direct-detection experiments. Furthermore, a direct connection is drawn between the dilution factor and the generation of stochastic gravitational waves as a result of an FOEWPT.
