The Color Evaporation Model in Diffractive $J/ψ$ Photoproduction

Details The Color Evaporation Model in Diffractive $J/ψ$ Photoproduction The Color Evaporation Model in Diffractive $J/ψ$ Photoproduction

1999-08-19

arxiv.org/abs/hep-ph/9908407v1

Phys.Lett.B464:286-292,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 eps figures included. Accepted for publication in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(99)00983-1

Our goal is the study of color effects on the $J/\psi$ and $D$ mesons production, as well as the study of their elastic production. We use the Color Evaporation Model (CEM), where a single factor takes into account the probability that the $c\bar{c}$ produced in a color octet state turns into a physical (colorless) quarkonium or continues as a color octet, producing open charm. The main result of this work, besides investigating the range of applicability of the CEM, is to show that this model can be used to describe the elastic processes of $J/\psi$ and open charm photoproduction without the use of a Pomeron.

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