Results are presented from an experiment designed to make the first systematic study of the depolarization parameter in elastic proton-proton scattering at high energies. Measurements were made at 3.0 and 6.0 GeV/c at |t| values extending to 1.7 (GeV/c)2 at the higher momentum. A high-intensity unpolarized proton beam was incident on a polarized proton target and the polarization of the elastically scattered recoil protons was determined with a carbon analyzer. The results are discussed in the framework of optical and exchange models.
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The reaction K − + p → Σ 0 + η was studied using data from a 600 000 picture exposure at nine K − momenta from 862–1001 MeV/ c in the Lawrence Berkeley Laboratory 25″ liquid hydrogen bubble chamber. Cross sections were obtained using both events where the η decayed via neutrals and events where the η decayed into π + π − π 0 . Angular distributions were obtained from only those events where the η decayed into π + π − π 0 . The results are compared to previous analyses and the questions of the Ση decay rate and SU(3) classification of the 1 2 − Σ(1750) are discussed.
FROM BOTH ETA --> NEUTRALS AND ETA --> PI+ PI0 PI- EVENTS.
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