2008/01/02 by H. Witala, H. Witała, J. Golak +6
Physics and Astronomy · #Nuclear Physics and Applications #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.77.034004
published as Phys.Rev.C77:034004,2008 · 29 pages, 2 ps figures
arxiv created 2008/01/02 · openalex publication_date 2008/03/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
We solve the Faddeev equation in an exactly Poincar'e invariant formulation of the three-nucleon problem. The dynamical input is a relativistic nucleon-nucleon (NN) interaction that is exactly on-shell equivalent to the high-precision CD Bonn NN interaction. S-matrix cluster properties dictate how the two-body dynamics is embedded in the three-nucleon mass operator (rest Hamiltonian). We find that for neutron laboratory energies above \ensuremath≈20 MeV relativistic effects on Ay are negligible. For energies below \ensuremath≈20 MeV dynamical effects lower the nucleon analyzing power maximum slightly by \ensuremath≈2% and Wigner rotations lower it further up to \ensuremath≈10%, thereby increasing disagreement between data and theory. This indicates that three-nucleon forces (3NF) must provide an even larger increase of the Ay maximum than expected up to now.