Speaker
Mariusz Sadzikowski
(Jagiellonian University)
Description
A contribution to J/psi hadroproduction is analyzed 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 in one of the protons, hence this contribution enters at a non-leading twist. It is, however, relevant due to an enhancement factor coming from large double gluon density at small x. We calculate the three-gluon contribution to J/Psi hadroproduction within perturbative QCD in the kT - factorization framework. The rescattering contribution is found to provide a significant correction to the standard leading twist cross-section at the energies of the Tevatron or the LHC at moderate pT . We suggest J/Psi production in proton-nucleus collision as a possible probe of the triple gluon mechanism.
additional information
This contribution is based on e-Print: arXiv:1501.04915 (accepted for publication
in European Physical Journal C).
Authors
Leszek Motyka
Mariusz Sadzikowski
(Jagiellonian University)
