Non-local symmetry breaking in Kaluza-Klein theories
A. Masiero, C. A. Scrucca, M. Serone, L. Silvestrini
Abstract
Scherk-Schwarz gauge symmetry breaking of a D-dimensional field theory model compactified on a circle is analyzed. It is explicitly shown that forbidden couplings in the unbroken theory appear in the one-loop effective action only in a non-local way, implying that they are finite at all orders in perturbation theory. This result can be understood as a consequence of the local gauge symmetry, but it holds true also in the global limit.
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