QED contribution to the production of J/ψ+c\bar{c}+X at the Tevatron and LHC

Details QED contribution to the production of J/ψ+c\bar{c}+X at the Tevatron and LHC QED contribution to the production of J/ψ+c\bar{c}+X at the Tevatron and LHC

2009-04-14

arxiv.org/abs/0904.2069v2

Phys.Rev.D79:094003,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 6 figures, version accepted for publication in Phys Rev D

Scientific paper

10.1103/PhysRevD.79.094003

We calculate \alpha^{2}\alpha_{s}^{2} order QED contribution to J/\psi production in pp(\bar{p})\to J/\psi+c\bar{c} color-singlet process at the Tevatron and LHC in the framework of non-relativistic QCD. The contribution of the interference between the \alpha^{2}\alpha_{s}^{2} QED and \alpha_{s}^{4} QCD is also taken into account. The J/\psi production associated with a charm quark pair could be a measurable signal at hadron collider experiment. Our calculations show that by including the QED contribution, the p_{t} distribution is enhanced by a factor of 1.5 (1.9) at the Tevatron (LHC) at p_{t}=50 (100) GeV. In addition, the polarization of J/\psi turns from unpolarized in all region to increasingly transverse when p_{t} becomes larger.

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