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WILSON'S EXPANSION WITH POWER ACCURACY

Xiangdong Ji
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Abstract

Because of the infrared renormalons, it is difficult to get power accuracy in the traditional approach to the Wilson's operator product expansion. Based on a new perturbative renormalization scheme for power-divergent operators, I propose a practical version of the OPE that allows to calculate power corrections to desired accuracy. The method is applied to the expansion of the vector-current correlation function in QCD vacuum, in which field theoretical status of the gluon condensate is discussed.

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Xiangdong Ji. 1995-06-01. WILSON'S EXPANSION WITH POWER ACCURACY. https://arxiv.org/abs/hep-ph/9506216

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