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Calculating the infrared central charges for perturbed minimal models: improving the RG perturbation

Lars Kjaergaard, Paul Mansfield

hep-tharXiv:hep-th/9905140

Abstract

We illustrate a method for improving Renormalisation Group improved perturbation theory by calculating the infrared central charge of a perturbed conformal field theory. The additional input is a dispersion relation that exploits analyticity of the energy-momentum tensor correlator.

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