On charmonia and charmed mesons photoproduction at high energy

Abstract

We compare the predictions of the collinear parton model and the k_T-factorization approach in JΨand D^\star meson photoproduction at HERA energies. It is shown that obtained in the both approaches D^\star meson spectra over p_T and ηas well as JΨmeson p_T- and z-spectra are very different. The predictions obtained in the k_T-factorization approach are agree with the experimental data well. We also predict the nontrivial p_T-dependence of the the spin parameter $α(p_T) in the JΨphotoproduction.

Talk was presented at International Seminar "Heavy quark - 2002", JINR, Dubna, Russia, May-June, 2002. In version 2 we have corrected numerical results for the D^star meson spectra

References in corpus (3)

• Unintegrated parton distributions
• Hadronic final state predictions from CCFM: the hadron-level Monte Carlo generator CASCADE
• Photoproduction of J/psi mesons at high energies in parton model and k_t-faktorization approach

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• Charm content of a proton in collinear parton model and in k_T-factorization approach