Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-11-29
Phys.Lett.B660:176-180,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 4 figures; experimental data and reference included, conclusions unchanged; to appear in Phys. Lett. B
Scientific paper
10.1016/j.physletb.2007.12.055
Energy dependence of heavy quarkonia production in hadron-nucleus collisions is studied in the framework of the Glauber-Gribov theory. We emphasize a change in the space-time picture of heavy-quark state production on nuclei with energy. Longitudinally ordered scattering of a heavy-quark system takes place at low energies, while with increasing energy it transforms to a coherent scattering of projectile partons on the nuclear target. The characteristic energy scale for this transition depends on masses and rapidities of produced particles. For J/psi, produced in the central rapidity region, the transition happens at RHIC energies. The parameter-free calculation of J/psi in dAu collisions is in good agreement with recent RHIC data. We use distributions of gluons in nuclei to predict suppression of heavy quarkonia at LHC.
Arsene I. C.
Bravina Larissa
Kaidalov Alexei B.
Tywoniuk Konrad
Zabrodin Eugene E.
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