Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 17: Hadronenstruktur und -spektroskopie
HK 17.9: Vortrag
Montag, 4. März 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 Strikman5 — 1Frankfurt 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 J/Ψ N 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)