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arXiv · 1408.5249

On multiple gluon exchange in J/psi hadroproduction

Leszek Motyka·Mariusz Sadzikowski
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Abstract

We consider a contribution to J/psi hadroproduction in which the meson production is mediated by three-gluon partonic state, with two gluons coming from the target and one gluon from the projectile. This mechanism involves double gluon density and thus it enters at a non-leading twist, but it is enhanced at large energies due to large double gluon density at small x. The three-gluon contribution to J/psi hadroproduction is calculated within perturbative QCD in the k_T factorization framework, and it is found to provide a significant correction to the standard leading twist cross-section at the energies of the Tevatron or the LHC. The results are given as differential p_T-dependent cross-sections for J/psi polarization components.

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Leszek Motyka, Mariusz Sadzikowski. 2014-08-22. On multiple gluon exchange in J/psi hadroproduction. https://arxiv.org/abs/1408.5249

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