Soft and hard QCD dynamics in hadroproduction of charmonium

Abstract

Both hard and soft QCD dynamics are important in charmonium production, as presented here through a next-to-leading order QCD matrix element calculation combined with the colour evaporation model. Observed $x_F$ and $p_{\perp }$ distributions of $J/\psi$ in hadroproduction at fixed target and $p\bar{p}$ collider energies are reproduced. Quite similar results can also be obtained in a more phenomenologically useful Monte Carlo event generator where the perturbative production of \ccbar pairs is instead obtained through leading order matrix elements and the parton shower approximation of the higher order processes. The soft dynamics may alternatively be described by the soft colour interaction model, originally introduced in connection with rapidity gaps. We also discuss the relative rates of different charmonium states and introduce an improved model for mapping the continuous \ccbar mass spectrum on the physical charmonium resonances.

21 pages, 13 eps figures

Cited by in corpus (20)

• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• New Observables in Inclusive Production of Quarkonia
• Evidence for simultaneous production of $J/\psi$ and ${\rm Y}$ mesons
• Measurement of inclusive differential cross sections for Upsilon(1S) production in p-pbar collisions at sqrt(s) = 1.96 TeV
• Associated production of a quarkonium and a Z boson at one loop in a quark-hadron-duality approach
• Indication for Double Parton Scatterings in W + Prompt J/Psi Production at the LHC
• Diffractive Higgs boson production at the Tevatron and LHC
• Jet Quenching from soft QCD Scattering in the Quark-Gluon Plasma
• Heavy Quark Photoproduction in k_T Factorization Approach
• Color Evaporation Description of Inelastic Photo-Production of J/ψat HERA
• QCD rescattering mechanism for diffractive deep inelastic scattering
• Diffractive Higgs bosons and prompt photons at hadron colliders
• Colour rearrangements in B-meson decays
• Prompt J/psi production at the LHC
• Quarkonium plus prompt-photon associated hadroproduction and nuclear shadowing
• Hard diffraction -- 20 years later
• Testing Color Evaporation in Photon-Photon Production of J/Psi at CERN LEP II
• Hard diffractive quarkonium hadroproduction at high energies
• Probing Gluons at the Spin Physics Detector
• J/psi+Z production at the LHC