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Title: On effects of multiple gluons in J/ψ hadroproduction

The three-gluon contribution to J/ψ hadroproduction is calculated within perturbative QCD in the k{sub T}-factorization framework. This mechanism involves double gluon density and enters at a non-leading twist, but it is enhanced at large energies due to large double gluon density at small x. We obtain results for differential p{sub T}-dependent cross-sections for all J/ψ polarisations. 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 p{sub T}. We also discuss a possible contribution of the rescattering correction to the anti-shadowing effect for J/ψ production in proton - nucleus collisions.
Authors:
;  [1]
  1. M. Smoluchowski Institute of Physics, Jagiellonian University, S. Lojasiewicz str. 11, 30-348 Krakow (Poland)
Publication Date:
OSTI Identifier:
22391375
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1654; Journal Issue: 1; Conference: DIFFRACTION 2014: International Workshop on Diffraction in High-Energy Physics, Primosten (Croatia), 10-16 Sep 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; CORRECTIONS; CROSS SECTIONS; FACTORIZATION; FERMILAB TEVATRON; GLUONS; J PSI-3097 MESONS; PARTICLE PRODUCTION; PROTON-NUCLEON INTERACTIONS; QUANTUM CHROMODYNAMICS; RESCATTERING; SHADOW EFFECT