Measurement of spin transmission parameters using longitudinally polarized beam and target and analyzing the recoil nucleon polarization in pp elastic scattering at Tkin0.88 GeV

The first results of double scattering experiments measuring also the recoil proton polarization are presented. Polarized proton beam of 0.88 GeV kinetic energy with longitudinal polarization was incident on the Saclay frozen spin target polarized along the beam direction. Elastic scattering events on polarized protons were registered in the range 50 deg < ΘCM < 90 deg. The beam-target spin correlation Aookk had been obtained from the event rates for beam and target polarizations parallel and antiparallel, respectively, integrating over final particle spin states. The angular dependence of the parameters Ponoo (recoil proton polarization for unpolarized beam and target), Kos''ko, Dos''ok (beam-recoil and target-recoil transmission parameters respectively), Nonkk (triple spin correlation) for pp elastic scattering at 0.88 GeV are measured