Extended BRS Symmetry and Gauge Independence in On-Shell Renormalization Schemes

Abstract

Extended BRS symmetry is used to prove gauge independence of the fermion renormalization constant $Z_2$ in on-shell QED renormalization schemes. A necessary condition for gauge independence of $Z_2$ in on-shell QCD renormalization schemes is formulated. Satisfying this necessary condition appears to be problematic at the three-loop level in QCD.

latex2e, 7 pages, 3 embedded eps figure

References in corpus (1)

• The Perturbative Pole Mass in QCD

Cited by in corpus (2)

• Landau-Khalatnikov-Fradkin transformation for the fermion propagator in QED in arbitrary dimensions
• Gauge covariance of the fermion Schwinger-Dyson equation in QED