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Inelastic J/psi and Upsilon hadroproduction

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arxiv hep-ph/0410020 v2 pith:AB6WCICT submitted 2004-10-01 hep-ph

Inelastic J/psi and Upsilon hadroproduction

V. A. Khoze , A. D. Martin , M. G. Ryskin , W. J. Stirling This is my paper
classification hep-ph
keywords colour-octetcrosshadroproductionperturbativesectionsupsilonadditionalcalculated
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider the prompt hadroproduction of J/psi, psi' and the Upsilon (1S,2S,3S) states caused by the fusion of a symmetric colour-octet two-gluon state and an additional gluon. The cross sections are calculated in leading-order perturbative QCD. We find a considerable enhancement in comparison with previous perturbative QCD predictions. Indeed, the resulting cross sections are found to be consistent with the values measured at the Tevatron and RHIC, without the need to invoke non-perturbative `colour-octet' type of contributions.

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