The reaction {pp \rightarrow pp \eta} was measured at excess energies of 15 and 50 MeV at an external beam-line of COSY with the Time of Flight Spectrometer. During one week of beam-time about 5000 events were measured for each excess energy. Both reaction protons of the process pp\protect \relax \kern .16667em \eta are detected with an acceptance of nearly 100% and the \eta is reconstructed by the missing mass technique. In a first step one third of the 15 MeV excess energy events are evaluated and examined with respect to differential values of which preliminary distributions are presented.
Measurement of the eta production in proton proton collisions with the COSY time-of-flight spectrometer.
MARCELLO, Simonetta;
2000-01-01
Abstract
The reaction {pp \rightarrow pp \eta} was measured at excess energies of 15 and 50 MeV at an external beam-line of COSY with the Time of Flight Spectrometer. During one week of beam-time about 5000 events were measured for each excess energy. Both reaction protons of the process pp\protect \relax \kern .16667em \eta are detected with an acceptance of nearly 100% and the \eta is reconstructed by the missing mass technique. In a first step one third of the 15 MeV excess energy events are evaluated and examined with respect to differential values of which preliminary distributions are presented.
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