QCD corrections to J/psi plus etac production in e+e- annihilation at sqrts=10.6 GeV
Abstract
Next-to-Leading-Order(NLO) QCD corrections to J/jpsi plus etac production in e+e- annihilation at sqrts=10.6 GeV is calculated in this paper, and an analytic result is obtained. By choosing proper physical parameters, a K factor (ratio of NLO to LO) of about 2, which is in agreement with the result in Ref.Zhang:2005ch, is obtained. Our results show that the Next-Next-to-Leading-Order(NNLO) corrections might be quite large. The plot of the K-factor vs the center-of-mass energy sqrts shows that it is more difficult to obtain a convergent result from the perturbative QCD without resummation of ln(s/mc) terms as the sqrts becomes larger.
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