Measurement of the spin correlation parameter in pp elastic scattering at 610 MeV

The spin correlation parameter Cnn has been measured in elastic pp scattering at 610 MeV at CM angles of 40, 67, 78, 90°. A polarized proton beam (PmaxB=0.38±0.02) and a ’’frozen’’ polarize proton target (PmaxT=0.97±0.04) have been used in the experiment.