QCD corrections to J/ψ plus ηc production in e+e- annihilation at √s=10.6 GeV

Next-to-leading-order QCD corrections to J/psi plus eta(c) production in e(+)e(-) annihilation at root s = 10.6 GeV are calculated in this paper, and an analytic result is obtained. By choosing proper physical parameters, a K factor (ratio of next-to-leading order to LO) of about 2, which is in agreement with the result in Y.-J. Zhang, Y.-j. Gao, and K.-T. Chao, Phys. Rev. Lett. 96, 092001 (2006), is obtained. The plot of the K factor vs the center-of-mass energy root s p shows that it is more difficult to obtain a convergent result from the perturbative QCD without resummation of ln(s/m(c)(2)) terms as the root s p becomes larger.