Operator product expansion and non-perturbative renormalization
Sergio Caracciolo, Andrea Montanari, Andrea Pelissetto
Abstract
It has been recently proposed to use the operator product expansion to evaluate the expectation values of renormalized operators without the need of a direct computation of the relevant renormalization constants. We test the viability of this idea in the two-dimensional non-linear sigma-model discussing the non-perturbative renormalization of the energy-momentum tensor.
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