Journal
PHYSICAL REVIEW D
Volume 96, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.96.091502
Keywords
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Funding
- National Natural Science Foundation of China [11405268, 11647113, 11705034]
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We present the first study of the QCD corrections to the color-singlet (CS) J/psi production in deeply inelastic ep scattering at HERA. The K-factor ranges from 0.85 to 2.38 in the kinematic regions we study. In low transverse momentum regions, the K-factors is even smaller, and close to 1, which indicates good convergence of the perturbative expansion. With the QCD corrections, the CS cross section is still below the data. At least at QCD next-to-leading order, the color-octet mechanism is necessary to describe the data.
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