On multiple gluon exchange in J/psi hadroproduction
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.
Cite
@article{arxiv.1408.5249,
title = {On multiple gluon exchange in J/psi hadroproduction},
author = {Leszek Motyka and Mariusz Sadzikowski},
journal= {arXiv preprint arXiv:1408.5249},
year = {2014}
}
Comments
6 pages, 2 figures, talk given at XXII. International Workshop on Deep-Inelastic Scattering and Related Subjects, 28 April - 2 May 2014, Warsaw, Poland