论文标题
$ t $ channel简化的暗物质模型中的强electroweak相过渡
Strong electroweak phase transition in $t$-channel simplified dark matter models
论文作者
论文摘要
除了标准模型物理外，还需要解释宇宙的暗物质和重子不对称，后者可能是在强一阶电动相变中产生的。尽管许多提出的模型独立解决了这些问题，但有趣的是询问同一模型是否可以解释这两者。在这种情况下，我们将相变热力学的最新扰动评估与暗物质能量密度的提取联系起来。这些技术应用于一个近乎最小的暗物质模型，该模型包含含量的majora虫费物，该模型通过标量介体耦合到标准模型钩子，其中介体直接与Higgs玻色子相互作用。对于暗物质质量180 GEV $ <m_χ<$ 300 GEV，我们辨别模型参数空间的区域，该区域重现了观察到的暗物质能密度并允许一阶相变，同时避免了最严格的碰撞器约束。
Beyond the Standard Model physics is required to explain both dark matter and the baryon asymmetry of the universe, the latter possibly generated during a strong first-order electroweak phase transition. While many proposed models tackle these problems independently, it is interesting to inquire whether the same model can explain both. In this context, we link state-of-the-art perturbative assessments of the phase transition thermodynamics with the extraction of the dark matter energy density. These techniques are applied to a next-to-minimal dark matter model containing an inert Majorana fermion that is coupled to Standard Model leptons via a scalar mediator, where the mediator interacts directly with the Higgs boson. For dark matter masses 180 GeV $ < M_χ<$ 300 GeV, we discern regions of the model parameter space that reproduce the observed dark matter energy density and allow for a first-order phase transition, while evading the most stringent collider constraints.
