Eur. Phys. J. C 21, 175-179 (2001)
DOI: 10.1007/s100520100709
On the gauge independence of the S-matrix
W. KummerInstitut für Theoretische Physik, Technische Universität Wien, Wiedner Hauptstrasse 8-10, 1040 Wien, Austria wkummer@tph.tuwien.ac.at
(Received: 27 April 2001 / Published online: 6 July 2001 -© Springer-Verlag / Società Italiana di Fisica 2001 )
Abstract
The S-matrix is invariant with respect to the variation of
any (global) parameter involved in the gauge-fixing
conditions, if that variation is accompanied by a certain
redefinition of the basis of polarization vectors.
Renormalizability of the underlying gauge
theory is not required. The proof is nonperturbative and,
using the "extended" BRS transformation, quite simple.
© Società Italiana di Fisica, Springer-Verlag 2001
