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arXiv · hep-ph/9909226

Power corrections and renormalon resummation for the average thrust

Einan Gardi·Georges Grunberg
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Abstract

Infrared power corrections for the average thrust < T > in e+e- annihilation are analyzed in the framework of renormalon resummation, motivated by analogy with the skeleton expansion in QED and the BLM approach. Performing the ``massive gluon'' renormalon integral a renormalization scheme invariant result is obtained. We find that a major part of the discrepancy between the known next-to-leading order (NLO) calculation and experiment can be explained by resummation of higher order perturbative terms. This fact does not preclude the infrared finite coupling interpretation with a substantial 1/Q power term. Fitting the regularized perturbative sum plus a 1/Q term to experimental data yields alpha_s^{MSbar}(M_Z)=0.110 \pm 0.006.

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Einan Gardi, Georges Grunberg. 1999-09-02. Power corrections and renormalon resummation for the average thrust. https://doi.org/10.1016/s0920-5632(00)00599-5

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