The elastic pd scattering analyzing powers and spin correlation coefficients at E-p(lab)=135 and 200 MeV: Three-nucleon force and relativistic effects

摘要

The rich set of data for analyzing powers and spin correlation coefficients in pd elastic scattering at E-p(lab) = 135 and 200 MeV taken at IUCF has been compared to theoretical predictions based on modern nuclear forces. To this aim the three-nucleon Faddeev equations have been solved with standard nucleon-nucleon potentials (AV18, CD Bonn, NijmI and II) alone or combined with the 2 pi-exchange Tucson-Melbourne three-nucleon force. For the AV18 potential also the Urbana IX three-nucleon interaction has been used. For some spin observables the addition of these three-nucleon forces improves the description of data whereas in other cases the description deteriorates. The relativistic effects for all studied spin observables have been investigated and found to be small. The conclusion is that significant parts of the three-nucleon force are missing.