ANALYZING POWERS OF P+D SCATTERING BELOW THE DEUTERON BREAKUP THRESHOLD

All the vector and tenser analyzing powers of the p+d scattering have been measured at E(p)(lab)=2.5 MeV (E(d)(lab)=5 MeV), where a calculat ion of the three-nucleon scattering state with an improved treatment o f Coulomb force has become available. Measurements have also been made at energies below and slightly above the deuteron breakup threshold a t E(p)(lab)=3.34 MeV. The experimental data have small statistical err ors ranging from +/- 0.0004 to +/- 0.0008, and the uncertainties in th e scale are less than 1%. The present data together with our previous data on the cross section are compared with several Faddeev calculatio ns based on a separable form nucleon-nucleon potential or on a realist ic potential with Coulomb force being treated nearly correctly or appr oximately. Disagreements between the calculations and the experiment a re found not only in the cross section and the vector analyzing powers A(y) and iT(11) but also in the tenser analyzing powers T-21 and T-22 .