2008/10/31 by Y. Kim, T. Sato, F. Myhrer +1 · 1 citation
Physics and Astronomy · #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.80.015206
published as Phys.Rev.C80:015206,2009 · 19 pages, 5 figures
arxiv created 2009/07/02 · openalex publication_date 2009/07/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Much effort has been invested on effective-field-theoretical studies of the near-threshold NN\ensuremath→NN\ensuremathπ reactions and, in order to deal with the somewhat large three-momentum transfers involved, the momentum counting scheme (MCS) was proposed as an alternative to the usual Weinberg counting scheme. Given the fact that a quantitative explanation of the existing high-precision NN\ensuremath→NN\ensuremathπ data requires a careful examination of higher chiral order contributions to the transition operator, we make a detailed numerical investigation of the convergence property of MCS for a pilot case of the pp\ensuremath→pp\ensuremathπ0 reaction. Our study indicates that MCS is superior to the Weinberg scheme in identifying dominant higher order contributions to the NN\ensuremath→NN\ensuremathπ reactions.