Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.162003
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Funding
- National Natural Science Foundation of China [10775141]
- Chinese Academy of Sciences [KJCX3-SYW-N2]
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We calculate the next-to-leading-order (NLO) QCD corrections to e(+)e(-)-> J/psi gg via color singlet J/psi(S-3(1)) at the B factories. The result shows that the cross section is enhanced to 0.373 pb by a K factor (NLO/LO) of about 1.21. By considering its dependence on the charm quark mass and renormalization scale, the NLO cross section can range from 0.294 to 0.409 pb. Further including the psi(') feed-down, sigma[e(+)e(-)-> J/psi X(non-cc<)] is enhanced by another factor of about 1.29 and reach 0.482 pb. In addition, the momentum distributions of J/psi production and polarization are presented. Recent measurements from Belle agree well with our prediction for the cross section and momentum distribution. It is expected that this process can serve as a very good channel to clarify the J/psi polarization puzzle by performing further experimental measurements.
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