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

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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

Scientific paper

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.

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