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Correlator of heavy-quark currents at small q² in the large-beta₀ limit
classification
✦ hep-ph
keywords
perturbativeambiguitycorrelatorcurrentsheavy-quarklarge-betalimitrenormalon
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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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Forward citations
Cited by 1 Pith paper
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Correlator of heavy-light quark currents in HQET in the large $\beta_0$ limit
Perturbative HQET correlator of heavy-light currents computed to O(m_q²) at leading 1/β₀ order with explicit renormalon-pole locations.
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