Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-03-10
Phys.Rev.C50:1015-1023,1994
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, 9 figures available on request, ISU-NP-93-15, LA-UR-94-784
Scientific paper
10.1103/PhysRevC.50.1015
We examine the production of J/$\Psi$ 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 $c\bar c$ pairs. We show that, at the energies of current fixed target experiments, J/$\Psi$ production through quark-antiquark annihilation gives the largest contribution at $x_F > 0.5$, while gluon-gluon fusion dominates the production at smaller $x_F$. The observed J/$\Psi$ suppression at large $x_F$ is directly connected to nuclear shadowing in deeply inelastic scattering. We find that a $6\sim 8$mb $c\bar c$-nucleon cross section is needed to explain the data on J/$\Psi$ suppression if a simple incoherent multiple scattering formalism is used for the final state interactions.
Benesh C. J.
Qiu Jianwei
Vary James P.
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