By definition, gauge theories - among the cornerstones of fundamental theoretical physics - involve more degrees of freedom than required by the underlying physics. The unphysical degrees of freedom must be shown t to yield unwarranted effects at every step in the formalism where explicit Lorentz covariance is required. The present work presents, in a rigorous way, a consistent formulation for the handling of ncovariant gauges in the quantization and rermalization of gauge theories. Though the path integral method is very convenient for the proof of unitarity and rermalizability of gauge theories, the canical formalism is eventually necessary to to expose the issues in a self-consistent way. These tes are written as an introduction to postgraduate students, lecturers and researchers in the field and assume prior kwledge of quantum field theory.
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
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Lecture Notes in Physics
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Springer-Verlag Berlin and Heidelberg GmbH & Co. K