Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 26: Electromagnetic Probes IV, Electro-, Photoproduction

HK 26.3: Talk

Tuesday, March 17, 1998, 14:45–15:00, B

Untersuchung der Reaktion γ p → p η von der Schwelle bis E_γ=1.44 GeV — •J"urgen Link — Institut f"ur Strahlen- und Kernphysik der Universit"at Bonn

Total and differential cross sections for η-photoproduction in a liquid hydrogen target have been measured using a tagged photon beam at the ELSA accelerator facility. The SAPHIR detector was employed to observe the η meson through its decay η → π⁺π⁻π⁰. The nucleon resonance S₁₁(1535) is known to decay into η p, but precise data exist only up to the S₁₁(1535) peak. The S₁₁(1650) seems not to decay into η p, but no photoproduction data exist for this mass region. Our present data extend the available energy range up to 1900 MeV and will allow the investigation of this region.