Gauge invariance of the quantum Wilson loop
Journal
Physical Review D
Journal Volume
36
Journal Issue
10
Pages
3196-3202
Date Issued
1987
Author(s)
Cheng, H.
Abstract
We define the quantum operator for the Wilson loop in QCD and prove that it is gauge invariant. We also derive diagrammatically the Feynman rules in various gauges for the perturbative calculation of the Wilson loop. Our result solves the puzzle whether the Feynman rules in the axial gauge are consistent with those in other gauges, to all order of the coupling constant and for all contours in the space-time region. In particular, we show that one must include the contribution of ghost loops if the principal-value prescription is used for the axial-gauge propagator. © 1987 The American Physical Society.
Type
journal article