Abstract
The study of near-threshold meson production in pp and pd collisions involving polarized beams and polarized targets offers the rare opportunity to gain insight into short-range features of the nucleon-nucleon interaction. The Cooler Synchrotron COSY at FZ-Jülich is a unique environment to perform such studies. Measurements of polarization observables require a cylindrically symmetrical detector, capable to measure the momenta and the directions of outgoing charged hadrons. The wide energy range of COSY leads to momenta of outgoing protons to be detected in a single meson production reaction between 300 and 2500 MeV/c. Scattering angles of protons to be covered extend to about 45° in the laboratory system. An azimuthal angular coverage of the device around 98% seems technically achievable. The required magnetic spectrometer could consist of a superconducting toroid, providing fields around 3 T.
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