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QCD Corrections to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mo>+</mml:mo><mml:mi>g</mml:mi><mml:mi>g</mml:mi></mml:math>at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>Factories
In heavy quarkonium production, the measured ratio ${R}_{c\overline{c}}=\ensuremath{\sigma}[J/\ensuremath{\psi}+c\overline{c}+X]/\ensuremath{\sigma}[J/\ensuremath{\psi}+X]$ 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 ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}+gg$ can enhance the cross section by about 20%. Together with the calculated NLO result for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}+c\overline{c}$, …