Further studies on the exclusive productions of J/ψ+χcJ (J=0,1,2) via e+e- annihilation at the B factories.

By including the interference effect between the QCD and the QED diagrams, we carry out a complete analysis on the exclusive productions of e+e-→J/ψ+χcJ (J=0,1,2) at the B factories with s=10.6 GeV at the next-to-leading-order (NLO) level in αs, within the nonrelativistic QCD framework. It is found that the O(α3αs)-order terms that represent the tree-level interference are comparable with the usual NLO QCD corrections, especially for the χc1 and χc2 cases. To explore the effect of the higher-order terms, namely O(α3αs2), we perform the QCD corrections to these O(α3αs)-order terms for the first time, which are found to be able to significantly influence the O(α3αs)-order results. In particular, in the case of χc1 and χc2, the newly calculated O(α3αs2)-order terms can to a large extent counteract the O(α3αs) contributions, evidently indicating the indispensability of the corrections. In addition, we find that, as the collision energy rises, the percentage of the interference effect in the total cross section will increase rapidly, especially for the χc1 case. [ABSTRACT FROM AUTHOR]