J/psi Production at the LHC

Details J/psi Production at the LHC J/psi Production at the LHC

1996-11-07

arxiv.org/abs/hep-ph/9611264v1

Nucl.Phys.Proc.Suppl. 55A (1997) 277-280

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, LaTex, 3 Figures included in the text, Contribution to the 2nd Int. Conference on Hyperons, charm and beauty hadrons

Scientific paper

10.1016/S0920-5632(97)00187-4

We firstly examine hadroproduction of prompt J/psi's at the Fermilab Tevatron in a Monte Carlo Framework by means of the event generator PYTHIA 5.7 in which those colour-octet matrix elements processes relevant for charmonium production have been implemented accordingly. We find that colour-octet matrix elements presented in literature from p-pbar collider data are systematically overestimated due to overlooking of the effective primordial transverse momentum of partons (i.e. including higher-order QCD effects). We estimate the size of these effects using different parton distribution functions. Finally, after normalization to Tevatron data, we extrapolate up to LHC energies making a prediction on the expected pt differential cross-section for charmonium.

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