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HK: Hadronen und Kerne

HK 18: Electromagnetic Probes III, Short Range NN-Correlations

HK 18.4: Talk

Monday, March 16, 1998, 18:00–18:15, F

Triple Coincidence Measurement of the Δ: ¹²C(e,e’pπ⁻)¹¹C [1] — •Axel Wagner — Institut für Kernphysik, Universität Mainz, Becherweg 45, D-55099 Mainz

A triple coincidence experiment was performed by using the three spectrometer facility at the Mainz microtron accelerator (MAMI) to investigate the production, propagation, and decay of the Δ resonance inside the nucleus. This reaction was measured by detecting both the proton and the pion from the Δ decay and the scattered electron in coincidence with high resolution magnetic spectrometers. Using carbon as target one achieved a luminosity of 2·10³⁷cm⁻²s⁻¹. The ground state and the first excited states of the recoil ¹¹C could be separated clearly. The experiment and cross sections at different kinematics will be presented.

[1] supported by Deutsche Forschungsgemeinschaft (SFB 201)