Non-perturbative scale anomaly and composite operators in gauge field theories

Autor:	V. P. Gusynin, V.A. Miransky
Rok vydání:	1987
Předmět:	Physics Nuclear and High Energy Physics Theoretical physics High Energy Physics::Lattice Conformal anomaly Quantum electrodynamics Mixed anomaly Global anomaly Symmetry breaking Gauge theory Anomaly (physics) Quantum field theory Gauge anomaly
Zdroj:	Physics Letters B. 198:362-366
ISSN:	0370-2693
DOI:	10.1016/0370-2693(87)90680-0
Popis:	In non-asymptoticall free gauge theories with a non-trivial ultraviolet fixed point, scale symmetry breaking (the scale anomaly) caused by the non-perturbative PCAC dynamics is studied. In the two-loop approximation the analytical expression for the gluon condensate is obtained. It is shown that the form of the anomaly depends on the type of phase of the theory to which it relates. The hypothesis about the soft behaviour at small distances of composite operators in such theories is confirmed.
Databáze:	OpenAIRE
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