Hadronic interaction of the eta meson with two nucleons

Details Hadronic interaction of the eta meson with two nucleons Hadronic interaction of the eta meson with two nucleons

2004-11-16

arxiv.org/abs/hep-ex/0411052v1

Int.J.Mod.Phys.A20:1880-1883,2005

Physics

High Energy Physics

High Energy Physics - Experiment

Talk given at 10th International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2004), Beijing, Chi

Scientific paper

10.1142/S0217751X05023542

The COSY-11 collaboration has conducted experiments aiming at the determination of the excitation function and phase-space population of the p p --> p p eta reaction close to the kinematical threshold. The precise data obtained with the stochastically cooled proton beam of the cooler synchrotron COSY and the high resolution zero-degree magnetic spectrometer allowed for the observation of the significant deviations - in the shape of the excitation function and two-particle invariant masses - from the predictions based on the assumption that the reaction phase space is homogenously populated. Comparison of the shape of the excitation function for the p p --> p p eta and p p --> p p eta-prime reaction allows to distinquish in the model independent way an influence originating from the proton-proton and proton-eta interaction. For the comparison the full data set from experiments performed at COSY and other laboratories is used.

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