2004/06/22 by H. Garcilazo, H. Garcilazo M. T. Pena, M. T. Peña · 6 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Meson #Nuclear physics #Nuclear physics research studies #Nucleon #Particle physics #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Relativistic quantum chemistry #nucl-th
paper · pdf · doi:10.1103/physrevc.72.014003
published in Physical Review C 72(1) (American Institute of Physics) · 18 pages 5 figures submitted to Phys. Rev. C
arxiv created 2004/06/22 · openalex publication_date 2005/07/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Relativistic effects in a three-body calculation of the np\ensuremath→\ensuremathηd process are considered. Parametrizations for the \ensuremathηN interaction obtained from phenomenological meson-nucleon models are probed. Relativistic effects on the range and strength of the pion exchange contribution to the reaction mechanism are seen to be large, while boost effects of the two-body interactions are negligible. The relativistic calculation confirms previous nonrelativistic results, showing that the shape of the cross section near threshold is essentially determined by the \ensuremathηd final-state interaction alone. As for the region away from threshold, the relativistic pion exchange contribution is seen to dominate the other mechanisms of the reaction. It turns out that, within the relativistic reaction model, the np\ensuremath→\ensuremathηd experimental data call for a comprehensive study to find parameters of the meson-nucleon interactions which are consistent with \ensuremathη production, both on the nucleon as well as on the deuteron.