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Bochum 1998 – wissenschaftliches Programm

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HK: Hadronen und Kerne

HK 4: Electromagnetic Probes I, Photoproduction

HK 4.6: Vortrag

Montag, 16. März 1998, 16:00–16:15, B

Planned measurement of η-photoproduction with the Crystal Barrel Detector at ELSA – calibration of the barrel calorimeter and parameters of the S11(1535)-resonance — •Volker Credé — Institut f"ur Strahlen- und Kernphysik der Universit"at Bonn, Nu"sallee 14-16, 53115 Bonn

The first beamtime for the Crystal Barrel Detector at ELSA (Bonn) is dedicated to the calibration of the barrel after the replacement of the old ADC-system of the CERN-experiment to a new Fastbus-based system. The reaction p(γ,η)p near threshold will be used for the precalibration of the crystals. The fine-calibration will be done with the much larger statistics from the P33-resonance decaying into π0-mesons. A combined measurement of the channels p(γη)p, p(γπ0)p and p(γπ+)n allows the determination of the decay branching ratios of the S11(1535).

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