Correlator of heavy-quark currents at small q 2 in the large- limit
Institut für Theoretische Teilchenphysik, Universität Karlsruhe, Germany
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The correlator of vector heavy-quark currents at small q 2 is considered in the large- limit. The leading IR renormalon ambiguity of the sum of the perturbative series is canceled by the UV renormalon ambiguity of the gluon condensate. The asymptotic behavior 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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