Renormalizability of the local composite operator A^2 in linear covariant gauges

Abstract

The local composite operator $A_{\mu }^2$ is analysed within the algebraic renormalization in Yang-Mills theories in linear covariant gauges. We establish that it is multiplicatively renormalizable to all orders of perturbation theory. Its anomalous dimension is computed to two-loops in the MSbar scheme.

10 pages, LaTeX, final version to appear in Phys. Lett. B

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