Direct J/psi and psi' hadroproduction via fragmentation in the collinear parton model and k_T-factorization approach

Abstract

The p_T-spectra for direct J/psi and psi' in hadroproduction at Tevatron energy have been calculated based on NRQCD formalism and fragmentation approximation in the collinear parton model and k_T-factorization approach. We have described the CDF data and obtained a good agreement between the predictions obtained in the parton model and k_T-factorization approach. We performed the calculations using the relevant leading order in alpha_s hard amplitudes and the equal values of the color-octet long-distance matrix elements for the both models.

10 pages, Latex, 4 eps figures, epsfig.sty, graphics.sty

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• Exclusive J/psi and Upsilon hadroproduction and the QCD odderon
• Inelastic J/psi and Upsilon hadroproduction
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• Prompt photon photoproduction at HERA within the framework of the quark Reggeization hypothesis
• Deep inelastic scattering and prompt photon production within the framework of quark Reggeization hypothesis
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• Diphoton production at Tevatron in the quasi-multi-Regge-kinematics approach
• B-meson production in the Parton Reggeization Approach at Tevatron and the LHC
• Open charm production at high energies and the quark Reggeization hypothesis
• Large-p_T production of D mesons at the LHCb in the parton Reggeization approach
• Open charm production in the parton Reggeization approach: from Tevatron to LHC
• BFKL Pomeron loop contribution in diffractive photoproduction and inclusive hadroproduction of $J/\psi$ and ${\rm Y}$
• On relative contributions of fusion and fragmentation mechanisms in J/psi photoproduction at high energy