Color-Octet Contribution to $J/ψ$ Hadroproduction with Nonzero $p_T$ at Fixed Target Energies

Details Color-Octet Contribution to $J/ψ$ Hadroproduction with Nonzero $p_T$ at Fixed Target Energies Color-Octet Contribution to $J/ψ$ Hadroproduction with Nonzero $p_T$ at Fixed Target Energies

1996-08-11

arxiv.org/abs/hep-ph/9608296v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Contribution to the III German -- Russian Workshop on Heavy Quark Physics, Dubna, Russia, May 20-22, 1996. 8 pages, LaTeX, 2 P

Scientific paper

We calculated the color-octet contribution to the $\ps$ hadroproduction at fixed target energies $\sqrt(s)\simeq40$ GeV. We consider the $\ps$ production with transverse momenta which can not be explained by primordial motion of partons, $p_T>1.5$ GeV. It is shown that color octet contribution is dominant at these energies and reduces large dicrepancies between experimental data and color singlet model predictions. Having taken into account both contribution one needs a K-factor about 2-3 to explain the experimental data.

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