Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 41: Schwerionenkollisionen und QCD Phasen IV

HK 41.5: Vortrag

Donnerstag, 18. März 2010, 15:15–15:30, HG I

J Production in Proton-Nucleus Collisions — •Jan Bsaisou1 and Nikolai N. Nikolaev1,21Institut für Kernphysik, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany — 2Landau Institute for Theoretical Physics, 142432 Chernogolovka, Russia

We consider the hard production of the same-side heavy quark-antiquark pairs in proton-nucleus collisions with application to the production of heavy vector mesons. The nonlinear k-factorization technique, which derives from the color dipole approach to small-x QCD, allows to sum all multiple pomeron exchanges and to quantify the effects of the nuclear modification of the gluon densities. Here we report principal results for nuclear effects in the production of heavy quark-antiquark pairs in the color-singlet and color-octet states at large and small transverse momenta. The latter would also contribute to the vector mesons production by color bleacing in final state interaction and hadronization. Based on the QCD-modified AGK unitarity rules for cut pomeron exchanges, we report for both color states the centrality dependence of cross sections.

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