Talk presented by Andrea Montanari

Parallel Session: Improvement and Renormalization III

Friday July 2nd, 14.50 - 15.10, Room B

Non perturbative renormalization via OPE

Abstract: Operator Product Expansion (OPE) provides a non perturbative definition of renrmalized composite operators. In order to understand the practical relevance in lattice field theory of such an idea we have studied the OPE of several operators for the nonlinear sigma model. The statistical accuracy and the effect of higher twists will be discussed.

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