Inclusive J/Psi photoproduction and polarization at HERA in the kt-factorization approach

Abstract

We investigate the inclusive photoproduction of J/Psi mesons at HERA within the framework of the kt-factorization QCD approach. Our consideration is based on the color singlet model supplemented with the relevant off-shell matrix elements and the CCFM and KMR unintegrated gluon densities in a proton and in a photon. Both the direct and resolved photon contributions are taken into account. Our predictions are compared with the recent experimental data taken by the H1 and ZEUS collaborations. Special attention is put on the J/Psi polarization parameters lambda and nu which are sensitive to the production dynamics.

21 pages, 15 figures

References in corpus (12)

• J/psi (psi') production at the Tevatron and LHC at O(α_s^4v^4) in nonrelativistic QCD
• Reconciling J/psi production at HERA, RHIC, Tevatron, and LHC with NRQCD factorization at next-to-leading order
• QCD corrections to J/psi and Upsilon production at hadron colliders
• Upsilon production at the Tevatron and the LHC
• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• QCD corrections to J/psi polarization of hadronproduction at Tevatron and LHC
• QCD corrections to polarization of J/ψand Υat Fermilab Tevatron and CERN LHC
• J/psi production at HERA
• Measurement of the polarization of the ${\rm Y}(1S)$ and ${\rm Y}(2S)$ states in $p\bar{p}$ collisions at $\sqrt{s}=$1.96 TeV
• Un-integrated PDFs in CCFM
• Inclusive production of $J/\psi$ meson in proton-proton collisions at BNL RHIC
• The Unintegrated Gluon Density in the Photon and Heavy Quark Production

Cited by in corpus (6)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Prompt charmonia production and polarization at LHC in the NRQCD with kt-factorization. Part I: psi(2S) meson
• Prompt J/Psi production at LHC: new evidence for the kt-factorization
• Prompt charmonia production and polarization at LHC in the NRQCD with kt-factorization. Part II: ${\chi }_c$ mesons
• A new phenomenological Investigation of $KMR$ and $MRW$ $unintegrated$ parton distribution functions
• Isolated prompt photon pair production at hadron colliders with kt-factorization