J/ ψ production at the LHC

We firstly examine hadroproduction of prompt J/ ψ's at the Fermilab Tevatron in a Monte Carlo framework by means of the event generator PYTHIA 5.7 in which those colour-octet processes relevant for charmonium production have been implemented accordingly. We find that colour-octet matrix element...

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Bibliographic Details
Published in:Nuclear physics. Section B, Proceedings supplement Proceedings supplement, 1997, Vol.55 (1), p.277-280
Main Authors: Sanchis-Lozano, Miguel Angel, Cano-Coloma, Beatriz
Format: Article
Language:English
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Summary:We firstly examine hadroproduction of prompt J/ ψ's at the Fermilab Tevatron in a Monte Carlo framework by means of the event generator PYTHIA 5.7 in which those colour-octet processes relevant for charmonium production have been implemented accordingly. We find that colour-octet matrix elements presented in literature from pp̄ 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 p t differential cross-section for charmonium.
ISSN:0920-5632
1873-3832
DOI:10.1016/S0920-5632(97)00187-4