Search for polarized antiproton production

The production of antiprotonsis studied in view of possible polarization effectsas basis for a polarized antiprotonbeam. If antiprotonsare produced with some polarization, a quite simple procedure for the generation of a polarized antiprotonbeam could be worked out. The experiments are performed at the CERN PS test beam T11 where secondary particles with momenta around 3.5 GeV/c are selected. The polarization analysis is performed by measuring the asymmetry of the elastic \(\bar {p} p\)-scattering in the Coulomb-nuclear interference region. The detection system includes Cherenkov and tracking detectors for the particle identificationand the 3d track reconstruction. Details on the detection system and the status of the analysis are given.