Order-alpha_s corrections to the quarkonium electromagnetic current at all orders in the heavy-quark velocity

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dc.creatorBodwin, Geoffrey T.
dc.creatorChung, Hee Sok
dc.creatorLee, Jungil
dc.creatorYu, Chaehyun
dc.date2008-07-16
dc.date2009-01-14
dc.date.accessioned2026-07-07T12:31:47Z
dc.date.available2026-07-07T12:31:47Z
dc.descriptionWe compute in order alpha_s the nonrelativistic QCD (NRQCD) short-distance coefficients that match quark-antiquark operators of all orders in the heavy-quark velocity v to the electromagnetic current. We employ a new method to compute the one-loop NRQCD contribution to the matching condition. The new method uses full-QCD expressions as a starting point to obtain the NRQCD contribution, thus greatly streamlining the calculation. Our results show that, under a mild constraint on the NRQCD operator matrix elements, the NRQCD velocity expansion for the quark-antiquark-operator contributions to the electromagnetic current converges. The velocity expansion converges rapidly for approximate J/psi operator matrix elements.
dc.description35 pages, minor corrections, version published in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0807.2634
dc.identifierhttp://arxiv.org/abs/0807.2634
dc.identifierPhys.Rev.D79:014007,2009
dc.identifierdoi:10.1103/PhysRevD.79.014007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216564
dc.subjectHigh Energy Physics - Phenomenology
dc.titleOrder-alpha_s corrections to the quarkonium electromagnetic current at all orders in the heavy-quark velocity
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