1998/03/19 by D. Hüber, J. L. Friar · 9 citations
Physics and Astronomy · #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.58.674
published as Phys.Rev.C58:674-685,1998 · 35 pages in REVTeX, 1 figure in postscript and 3 figures in PiCTeX
arxiv created 1998/03/19 · openalex publication_date 1998/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The nucleon-deuteron analyzing power Ay in elastic nucleon-deuteron scattering poses a longstanding puzzle. At energies Elab below approximately 30 MeV Ay cannot be described by any realistic nucleon-nucleon (NN) force. The inclusion of existing three-nucleon forces does not improve the situation. Because of recent questions about the 3PJ NN phases, we examine whether reasonable changes in the NN force can resolve the puzzle. In order to do this we investigate the effect on the 3PJ waves produced by changes in different parts of the potential (viz., the central force, tensor force, etc.), as well as on the two-body observables and on Ay. We find that it is not possible with reasonable changes in the NN potential to increase the three-body Ay and at the same time to keep the two-body observables unchanged. We therefore conclude that the Ay puzzle is likely to be solved by new three-nucleon forces, such as those of the spin-orbit type, which have not yet been taken into account.