Measurement of the Eta Production in Proton Proton Collisions with the COSY Time of Flight Spectrometer

Details Measurement of the Eta Production in Proton Proton Collisions with the COSY Time of Flight Spectrometer Measurement of the Eta Production in Proton Proton Collisions with the COSY Time of Flight Spectrometer

2002-05-23

arxiv.org/abs/nucl-ex/0205016v1

Eur.Phys.J. A16 (2003) 127-137

Physics

Nuclear Physics

Nuclear Experiment

15 pages, 14 figures, 4 tables

Scientific paper

The reaction pp -> pp eta was measured at excess energies of 15 and 41 MeV at an external target of the Juelich Cooler Synchrotron COSY with the Time of Flight Spectrometer. About 25000 events were measured for the excess energy of 15 MeV and about 8000 for 41 MeV. Both protons of the process pp eta were detected with an acceptance of nearly 100% and the eta was reconstructed by the missing mass technique. For both excess energies the angular distributions are found to be nearly isotropic. In the invariant mass distributions strong deviations from the pure phase space distributions are seen.

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