Perturbative QCD analysis of exclusive J/ψ+η_c production in e^+e^- annihilation

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dc.creatorChoi, Ho-Meoyng
dc.creatorJi, Chueng-Ryong
dc.date2007-07-09
dc.date2007-10-03
dc.date.accessioned2026-07-07T10:56:38Z
dc.date.available2026-07-07T10:56:38Z
dc.descriptionWe analyze the exclusive charmonium $J/ψ+η_c$ pair production in $e^+e^-$ annihilation using the nonfactorized perturbative QCD and the light-front quark model(LFQM) that goes beyond the peaking approximation. We effectively include all orders of higher twist terms in the leading order of QCD coupling constant and compare our nonfactorized analysis with the usual factorized analysis in the calculation of the cross section. We also calculate the quark distribution amplitudes, the Gegenbauer moments, and the decay constants for $J/ψ$ and $η_c$ mesons using our LFQM. Our nonfactorized result enhances the NRQCD result by a factor of $3\sim4$ at $\sqrt{s}=10.6$ GeV.
dc.description17 pages, 6figures; added 2 more figures; version to appear in Physical Review D
dc.identifierhttps://arxiv.org/abs/0707.1173
dc.identifierhttp://arxiv.org/abs/0707.1173
dc.identifierPhys.Rev.D76:094010,2007
dc.identifierdoi:10.1103/PhysRevD.76.094010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186478
dc.subjectHigh Energy Physics - Phenomenology
dc.titlePerturbative QCD analysis of exclusive J/ψ+η_c production in e^+e^- annihilation
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