Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 22: Postersitzung

HK 22.49: Poster

Montag, 7. März 2005, 16:30–18:00, TU MA141

Detection of η_c → K^± π^∓K_s⁰ with PANDA — •F. Ottone¹, M.G. Destefanis¹, I. Fröhlich¹, D.G. Kirschner¹, L. Lavezzi², J. Ritman³, A. Sokolov³, and W. Kühn¹ — ¹Justus Liebig-Universität Gießen — ²Università degli Studi di Pavia — ³Institut für Kernphysik, Forschungszentrum Jülich

Fundamental questions of hadron and nuclear physics will be studied in interactions of antiprotons and protons, using the PANDA detector at GSI. A benchmark channel that will be taken into account is the η_c→ K^± π^∓ K_s⁰, where the η_c is the ground state of charmonium, at 2.979 GeV/c². In the past two years there have been five published measuraments of the η_c properties which disagree strongly among themselves. By detecting hadronic final states, such as KK π, with branching fractions two orders of magnitude higher than the decay modes studied so far, high statistics samples can be easily collected, thus allowing a study of the mass, width and branching ratios with high precision. In this poster the latest results of the simulation will be presented.

Work supported by BMBF, DFG, EU and GSI.