论文标题
仪表玻色子投影仪的量规依赖性
Gauge dependence of the gauge boson projector
论文作者
论文摘要
仪表玻色子的传播器，例如无质量的光子或巨大的矢量玻色子$ w^\ pm $和$ z $的电牵引理论，可以通过两种不同的方式得出，即通过格林的函数（半经典方法）或通过现场运营商（现场运营商）（现场计算方法）的效率预期价值（半经典方法）。将半古典主义与现场理论方法进行比较，中央张力对象可以定义为量规玻色子投影仪，这与完整的极化四个向量集的完整关系直接相关。在本文中，我们解释了该投影仪与$r_ξ$仪表的不同情况的关系，并解释了为什么单位量规是大型仪表玻色子的默认规格。
The propagator of a gauge boson, like the massless photon or the massive vector bosons $W^\pm$ and $Z$ of the electroweak theory, can be derived in two different ways, namely via Green's functions (semi-classical approach) or via the vacuum expectation value of the time-ordered product of the field operators (field theoretical approach). Comparing the semi-classical with the field theoretical approach, the central tensorial object can be defined as the gauge boson projector, directly related to the completeness relation for the complete set of polarisation four-vectors. In this paper we explain the relation for this projector to different cases of the $R_ξ$ gauge and explain why the unitary gauge is the default gauge for massive gauge bosons.
