Two-loop Correction to the Leptonic Decay of Quarkonium

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dc.creatorBeneke, M.
dc.creatorSigner, A.
dc.creatorSmirnov, V. A.
dc.date1997-12-08
dc.date.accessioned2026-07-07T10:33:36Z
dc.date.available2026-07-07T10:33:36Z
dc.descriptionApplying asymptotic expansions at threshold, we compute the two-loop QCD correction to the short-distance coefficient that governs the leptonic decay $ψ\to l^+ l^-$ of a S-wave quarkonium state and discuss its impact on the relation between the quarkonium non-relativistic wave function at the origin and the quarkonium decay constant in full QCD.
dc.description7 pages, LaTeX, 1 figure included via epsf.sty
dc.identifierhttps://arxiv.org/abs/hep-ph/9712302
dc.identifierhttp://arxiv.org/abs/hep-ph/9712302
dc.identifierPhys.Rev.lett.80:2535-2538,1998
dc.identifierdoi:10.1103/PhysRevLett.80.2535
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/179169
dc.subjectHigh Energy Physics - Phenomenology
dc.titleTwo-loop Correction to the Leptonic Decay of Quarkonium
dc.typetext

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