QCD Corrections to Double J/Ψ Production in e~+e~- Annihilation at s~(1/2) = 10.6 GeV

摘要

Next-to-leading-order (NLO) QCD corrections to double J/Ψ production in e~+e~- annihilation at s~(1/2) = 10.6 GeV are calculated. We find that they greatly decrease the cross section, with a K factor (NLO/LO) ranging from -0.31 to 0.25 depending on the renormalization scale. Although the renormalization scale dependence indicates a large uncertainty, when combined with the NLO QCD corrections to J /Ψ + η_c production, it can explain why the double J/Ψ production could not be found at B factories while the J/Ψ + η_c production could, despite the fact that cross section of the former is larger than that of the latter at LO by a factor of 1.8. perturbative calculations; hadron production in e-e+ interactions; mesons with S=C=B=0, mass > 2.5 GeV (including quarkonia)