Causal Propagators for the Second Order Wilson Loop

TL;DR

This paper evaluates the second-order Wilson loop in non-covariant gauges using a causal principal-value prescription, demonstrating that it aligns with traditional causal methods.

Contribution

It introduces a causal principal-value approach for calculating the Wilson loop at second order in non-covariant gauges, confirming consistency with established prescriptions.

Findings

The causal principal-value prescription yields results consistent with standard causal methods.

The approach is applicable to non-covariant gauges for Wilson loop calculations.

The method simplifies the evaluation of gauge-dependent contributions.

Abstract

We evaluate the Wilson loop at second order in general non-covariant gauges by means of the causal principal-value prescription for the gauge- dependent poles in the gauge-boson propagator and show that the result agrees with the usual causal prescriptions.