Relativistic correction to J/{psi} production at hadron colliders

Journal Article · Mon Jun 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.114009· OSTI ID:21296444

Ying, Fan; Yanqing, Ma; Kuangta, Chao ^[1]

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1. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)

Relativistic corrections to the color-singlet J/{psi} hadroproduction at the Tevatron and LHC are calculated up to O(v{sup 2}) in nonrelativistic QCD (NRQCD). The short-distance coefficients are obtained by matching full QCD with NRQCD results for the subprocess g+g{yields}J/{psi}+g. The long-distance matrix elements are extracted from observed J/{psi} hadronic and leptonic decay widths up to O(v{sup 2}). Using the CTEQ6 parton distribution functions, we calculate the leading-order production cross sections and relativistic corrections for the process p+p(p){yields}J/{psi}+X at the Tevatron and LHC. We find that the enhancement of O(v{sup 2}) relativistic corrections to the cross sections over a wide range of large transverse momentum p{sub t} is negligible, only at a level of about 1%. This tiny effect is due to the smallness of the correction to short-distance coefficients and the suppression from long-distance matrix elements. These results indicate that relativistic corrections cannot help to resolve the large discrepancy between leading-order prediction and experimental data for J/{psi} production at the Tevatron.

• OSTI ID: 21296444
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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