Correlator of heavy-quark currents at small q^2 in the large-beta_0 limit

Details Correlator of heavy-quark currents at small q^2 in the large-beta_0 limit Correlator of heavy-quark currents at small q^2 in the large-beta_0 limit

2004-12-03

arxiv.org/abs/hep-ph/0412040v1

Eur.Phys.J.C40:157-164,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 3 figures

Scientific paper

10.1140/epjc/s2005-02124-2

The correlator of vector heavy-quark currents at small q^2 is considered in the large-beta_0 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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