Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 43: Hadronenstruktur und -spektroskopie VII

HK 43.5: Vortrag

Donnerstag, 18. März 2010, 15:30–15:45, HG III

Measurement of the J/Ψ - Nucleon dissociation cross section with PANDA — •Paul Buehler and Katalin Nikolics — Stefan Meyer Institute, Vienna, Austria

To understand the charmonium interaction with nuclear matter is important for the description of the photo- and hadro-production of charmonium and charmed hadrons on nuclear targets as well as for diagnostics of hadronic final states in heavy-ion collisions. The suppression of charmonium production in heavy ion collisions e.g. is proposed to be a signal for the formation of Quark-Gluon-Plasma (QGP). Investigating the absorption cross section of charmonium in nuclear matter should yield valuable information on this process. The first excited state of charmonium, J/Ψ, can be produced in antiproton-nucleus collisions which will be studied at the PANDA experiment. J/Ψ can be identified via its leptonic decay channels. Its interaction with nucleons in the nuclear environment, in particular the J/Ψ - nucleon dissociation cross section can be deduced from the measurement of its production as a function of the size of the target nucleus. Simulation studies including both the physics aspects of this process and the detector response to both signal and background are required in order to evaluate the scientific potential of the planned experiments. In this talk we discuss data analysis procedures for the determination of the J/Ψ - nucleon dissociation cross section which we tested with simulated data.

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