Gauge parameter dependence in gauge theories (revised: subsection 2.3)

Details Gauge parameter dependence in gauge theories (revised: subsection 2.3) Gauge parameter dependence in gauge theories (revised: subsection 2.3)

1994-06-17

arxiv.org/abs/hep-th/9406115v2

Nucl.Phys.Proc.Suppl. 37B (1994) 120-125

Physics

High Energy Physics

High Energy Physics - Theory

6, MPI-PhT/94-34, BUTP-94/15

Scientific paper

10.1016/0920-5632(94)90667-X

Dependence on the gauge parameters is an important issue in gauge theories: physical quantities have to be independent. Extending BRS transformations by variation of the gauge parameter into a Grassmann variable one can control gauge parameter dependence algebraically. As application we discuss the anomaly coefficient in the Slavnov-Taylor identity, $S$-matrix elements, the vector two-point-function and the coefficients of renormalization group and Callan-Symanzik equation.

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