Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-05-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
28 pages, LateX, Lectures given at the Triangle Graduate School 96, Charles University, Prague September 2-11, 1996
Scientific paper
These lectures present an elementary introduction to quantum gauge fields. The first aim is to show how, in the tree approximation, gauge invariance follows from covariance and unitarity. This leads to the standard construction of the Lagrangian by means of covariant derivatives in a form that unifies the massive and the massless case. Having so identified the classical theory, the Faddeev-Popov quantization method is introduced and the BRS invariance of the resulting action is discussed.
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