Correlator of heavy-quark currents at small q2 in the large-beta0 limit
Abstract
The correlator of vector heavy-quark currents at small q2 is considered in the large-beta0 limit. The leading IR renormalon ambiguity of the sum of the perturbative series is canceled by the UV renormalon ambiguity of the gluon condensate. Asymptotic behaviour of the perturbative series is obtained in a model-independent way, up to a single unknown normalization factor. Gluon-virtuality distribution functions for the perturbative correction are calculated.
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