Structure Observed in the Spin-Spin Correlation ParameterCLL=(L, L; 0, 0)inppElastic Scattering aroundθc.m.=90°in the Regionplab=2.55.0GeV/c

Abstract
The spin-spin correlation parameter CLL=(L, L; 0, 0) has been measured for pp elastic scattering around θc.m.=90° up to plab=5 GeV/c. An interesting energy dependence is observed in CLL and the results are interpreted by comparison with other available data.