Extended BRS Symmetry and Gauge Independence in On-Shell Renormalization Schemes
classification
✦ hep-th
keywords
renormalizationgaugeindependenceon-shellschemesconditionextendednecessary
read the original 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.
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