The Color Evaporation Model in Diffractive $J/\psi$ Photoproduction

Abstract

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.

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

References in corpus (4)

• Measurement of Inelastic J/Psi Photoproduction at HERA
• J/psi production at the Tevatron and HERA: the effect of k_T smearing
• Inelastic Photoproduction at HERA: a Second Charmonium Crisis?
• Are Two Gluons the QCD Pomeron?

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• Probing Transverse Momentum Dependent Parton Distributions in Charmonium and Bottomonium Production
• Transverse Single Spin Asymmetry in $p+p^{\uparrow }\to J/\psi +X$
• Charm Physics - A Field Full with Challenges and Opportunities
• Diffractive quarkonium photoproduction in $pp$ and $pA$ collisions at the LHC: Predictions of the Resolved Pomeron model for the Run 2 energies
• Investigating the Transverse Single Spin Asymmetry in the Inelastic $J/\Psi$ photoproduction in $p^{\uparrow }p$ and $p^{\uparrow }A$ collisions
• Color Evaporation and Elastic ${\rm Y}$ Photoproduction at DESY HERA
• Transverse Single Spin Asymmetries and Charmonium Production
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