Color-singlet direct J/ψand ψ' production at Tevatron in the k_t factorization approach

Details Color-singlet direct J/ψand ψ' production at Tevatron in the k_t factorization approach Color-singlet direct J/ψand ψ' production at Tevatron in the k_t factorization approach

2000-08-29

arxiv.org/abs/hep-ph/0008302v1

Phys.Rev.D63:034006,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 10 pages, 4 figures

Scientific paper

10.1103/PhysRevD.63.034006

Direct $J/\psi$ and $\psi'$ production rates at Tevatron are calculated in the $k_t$-factorization approach within the color-singlet model. In this approach, the production rates are enhanced by a factor of 20 compared to the naive collinear parton model. However, the theoretical predictions are still below the experimental data by at least one order of magnitude. This means that to explain charmonium productions at Tevatron, we still need to call for the contributions from color-octet channels or other production mechanisms.

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