论文标题
标准模型和多临界点原理的复杂单线扩展
A complex singlet extension of the Standard Model and Multi-critical Point Principle
论文作者
论文摘要
我们研究了标准模型（CXSM）复杂的单线标量扩展中的多临界点原理（MPP）。本研究中讨论的MPP选择了模型参数，因此标量场实现的两个低能真空吸尘器是退化的。我们进一步指出，MPP可以在某种类别的模型中抑制电子相变（EWPT），在某种类别中，树级潜力在其实现中起着至关重要的作用。尽管如此，我们还表明，即使将MPP施加到CXSM的标量势后，由于新标量玻色子的1循环校正，仍然会发生强大的一阶EWPT。我们研究了允许的参数空间，其中额外标量与标准模型Higgs Boson的质量是退化的，该标准模型Higgs Boson提供了一种内置机制来规避来自暗物质直接检测实验的约束。还研究了非分类标量场景的参数空间以进行比较。
We study the Multi-critical Point Principle (MPP) in a complex singlet scalar extension of the Standard Model (CxSM). The MPP discussed in this study selects model parameters so that two low-energy vacua realized by scalar fields are degenerate. We further note that the MPP may inhibit the electroweak phase transition (EWPT) in a certain class of models where the tree-level potential plays an essential role in its realization. Despite that, we show that strong first-order EWPT still occurs even after imposing the MPP to the scalar potential of the CxSM due to the 1-loop corrections by the new scalar boson. We study the allowed parameter space where a mass of the additional scalar is degenerate with that of the Standard Model Higgs boson, which provides a built-in mechanism to circumvent constraints from dark matter direct detection experiments. The parameter space for the non-degenerate scalar scenario is also studied for comparison.
