1994/03/10 by C. J. Benesh, Jian-Wei Qiu, J. Qiu +2
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.50.1015
published as Phys.Rev.C50:1015-1023,1994 · 24 pages, 9 figures available on request, ISU-NP-93-15, LA-UR-94-784
arxiv created 1994/03/10 · openalex publication_date 1994/08/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We examine the production of J/\ensuremathψ mesons in high energy hadron-nucleus collisions using models that account for both the initial state modification of parton distributions in nuclei and the final state interaction of the produced cc\ifmmode\else\textasciimacron\fi pairs. We show that, at the energies of current fixed target experiments, J/\ensuremathψ production through quark-antiquark annihilation gives the largest contribution at xF>0.5 while gluon-gluon fusion dominates the production at smaller xF. The observed J/\ensuremathψ suppression at large xF is directly connected to nuclear shadowing in deeply inelastic scattering. We find that a 6--8 mb cc\ifmmode\else\textasciimacron\fi-nucleon cross section is needed to explain the data on J/\ensuremathψ suppression if a simple incoherent multiple scattering formalism is used for the final state interactions. We then provide a more complete model to incorporate the effects of final state multiple soft scatterings. With only one parameter, this model can fit both the normalization and A dependence of the data for a variety of nuclei.