QCD Corrections to e+e-→J/ψ plus gg at B Factories

In heavy quarkonium production, the measured ratio R-cc=sigma[J/psi+cc+X]/sigma[J/psi+X] at B factories is much larger than existing theoretical predictions. To clarify this discrepancy, in nonrelativistic QCD we find the next-to-leading-order (NLO) QCD correction to e(+)e(-)-> J/psi+gg can enhance the cross section by about 20%. Together with the calculated NLO result for e(+)e(-)-> J/psi+cc, we show that the NLO corrections can significantly improve the fit to the ratio R-cc. The effects of leading logarithm resummation near the end point on the J/psi momentum distribution and total cross section are also considered. Comparison of the calculated cross section for e(+)e(-)-> J/psi+gg with the observed cross section for e(+)e(-)-> J/psi+non-(cc) is expected to provide unique information on the issue of color-octet contributions.