Publication Date:
2014-04-18
Description:
Based on the nonrelativistic QCD factorization approach, ##IMG## [http://ej.iop.org/icons/Entities/calO.gif] {Script O} (α s υ 2 ) corrections to J/ψ plus η c production in e + e − annihilation at √ s = 10.6 GeV are calculated in this work. The numerical results show that the correction at α s υ 2 order is only about a few percent of the total theoretical result. This indicates that the perturbative expansions become convergent and that a higher order correction will be smaller. The uncertainties from the long-distance matrix elements, renormalization scale and the measurement in the experiment are also discussed. Our result is in agreement with the previous result by Jia.
Print ISSN:
1674-1137
Topics:
Physics
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