论文标题
一阶电动相过渡和从天然轻单线标量的男性生成
First-Order Electroweak Phase Transition and Baryogenesis from a Naturally Light Singlet Scalar
论文作者
论文摘要
我们研究了实现强大一阶电子相变的标准模型的最小单元量表扩展。由于近似移位对称性，因此单独的单元可能是自然而然的光线，并且没有引入标准模型Higgs之外的额外层次结构问题。我们详细讨论了相变的两场动力学，并发现重力波信号太弱，无法通过近未实现的观测值检测到。我们还讨论了零温标量势的元稳定性。尽管明显的不稳定刚好高于电动量表，但我们表明，电动真空吸尘器的寿命比宇宙的年龄长得多，因此设置不需要在electroweak量表附近完成紫外线。宇宙的重子不对称可能是由局部电动性男性作用来解释的，这是由于单线和弱孔孔之间的耦合而产生的。预测的电子偶极矩远低于电流结合。可行的参数空间可以通过稀有kaon衰减和宇宙微波背景的观察结果来探测。
We investigate a minimal singlet-scalar extension to the Standard Model that achieves a strong first-order electroweak phase transition. The singlet can be naturally light because of an approximate shift symmetry and no extra hierarchy problem beyond that of the Standard Model Higgs is introduced. We discuss the two-field dynamics of the phase transition in detail and find that the gravitational-wave signal is too weak to be detected by near-future observations. We also discuss the meta-stability of the zero-temperature scalar potential. Despite the apparent instability just above the electroweak scale, we show that the lifetime of the electroweak vacuum is much longer than the age of the universe and hence the setup does not require UV completion near the electroweak scale. The baryon asymmetry of the universe may be explained by local electroweak baryogenesis arising from a coupling between the singlet and weak gauge boson. The predicted electron electric dipole moment is much below the current bound. The viable parameter space can be probed by the observations of rare Kaon decay and the cosmic microwave background.
