Münster 2002 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 40: Electromagnetic and Hadronic Probes V

HK 40.3: Talk

Thursday, March 14, 2002, 14:45–15:00, D

Study of pηη, pω, pπ⁰ω and pη^′ final states observed by the CB-ELSA-Experiment — •Jörg Junkersfeld — ISKP, Universität Bonn

One aim of the Crystal-Barrel-Experiment at ELSA is the study of high-mass nucleon resonances in photoproduction off protons in a liquid hydrogen target. The detector system covers a large solid angle (98 % of 4π in the lab sytem) and has a large angular and energy resolution. These features allow the investigation of final states with high photon-multiplicity. Data at photon energies up to 2.8 GeV were taken. From these data 200000 pπ⁰π⁰ and 40000 pπ⁰η events were identified. The covered energy range gives also access to rare final states like pηη, pω, pπ⁰ω and pη^′. The search for these final states and the first results will be presented.

Supported by DFG.