论文标题
电子相变的扰动计算有多随意？
How arbitrary are perturbative calculations of the electroweak phase transition?
论文作者
论文摘要
我们研究了电子相变的扰动计算是任意和不确定的，这是由于其仪表，重新归一化的量表和方案依赖性以及戈德石灾难和雏菊图的处理程度。 Using the complete parameter space of the Standard Model extended by a real scalar singlet with a $\mathbb{Z}_2$ symmetry as a test, we explore the properties of the electroweak phase transition in general $R_ξ$ and covariant gauges, OS and $\overline{\text{MS}}$ renormalisation schemes, and for common treatments of the Goldstone catastrophe and雏菊图。令人放心的是，我们发现，戈德石灾难和雏菊图的不同重构化方案以及不同的治疗方法通常仅导致预测的临界温度和相变强度的适度变化。另一方面，仪表和重量量量表的依赖性可能很大，并且通常会影响相变的存在。
We investigate the extent to which perturbative calculations of the electroweak phase transition are arbitrary and uncertain, owing to their gauge, renormalisation scale and scheme dependence, as well as treatments of the Goldstone catastrophe and daisy diagrams. Using the complete parameter space of the Standard Model extended by a real scalar singlet with a $\mathbb{Z}_2$ symmetry as a test, we explore the properties of the electroweak phase transition in general $R_ξ$ and covariant gauges, OS and $\overline{\text{MS}}$ renormalisation schemes, and for common treatments of the Goldstone catastrophe and daisy diagrams. Reassuringly, we find that different renormalisation schemes and different treatments of the Goldstone catastrophe and daisy diagrams typically lead to only modest changes in predictions for the critical temperature and strength of the phase transition. On the other hand, the gauge and renormalisation scale dependence may be significant, and often impact the existence of the phase transition altogether.
