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Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 17: Hadronenstruktur und -spektroskopie

HK 17.9: Talk

Monday, March 4, 2013, 18:45–19:00, HSZ-204

Charmonium production in p-nucleus reactions at low energies — •Alexei Larionov1,2, Markus Bleicher1,3, Albrecht Gillitzer4, and Mark Strikman51Frankfurt Institute for Advanced Studies (FIAS), Ruth-Moufang-Straße 1, D-60438 Frankfurt — 2National Research Center "Kurchatov Institute", 123182 Moscow, Russia — 3Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, D-60438 Frankfurt — 4Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich — 5Pennsylvania State University, University Park, PA 16802, USA

The J/Ψ(1S), Ψ(2S) and χc1(1P) production near threshold in antiproton-nucleus reactions is calculated within a Glauber model. The model takes into account the antiproton (pre)absorption, proton Fermi motion, and charmonium formation length. The realistic proton and neutron density profiles are included in our calculations. We confirm earlier prediction that the charmonium production in pA collisions at plab=3−10 GeV/c is not influenced by formation length effects and is very well suited to determine the genuine charmonium-nucleon dissociation cross sections. However, we demonstrate that the detailed structure of the proton and neutron density profiles have to be taken into account, if one wants to extract information on the JN dissociation cross section from J/Ψ transparency ratios. The possibility to test the polarization-dependent χc1N cross sections is discussed. These studies are relevant for the upcoming PANDA experiment at FAIR.
Supported by the Hessian LOEWE initiative through the Helmholtz International Center for FAIR (HIC for FAIR)

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