1998/07/30 by G. Q. Li, R. Machleidt · 3 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.58.3153
published as Phys.Rev.C58:3153-3162,1998 · 12 pages, RevTex, 14 figures
arxiv created 1998/07/30 · openalex publication_date 1998/12/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Based upon the Bonn meson-exchange-model for the nucleon-nucleon (NN) interaction, we calculate the charge-independence breaking (CIB) of the NN interaction due to pion-mass splitting. Besides the one-pion exchange (OPE), we take into account the 2\ensuremathπ-exchange model and contributions from three and four irreducible pion exchanges. We calculate the CIB differences in the 1S0 effective range parameters as well as phase-shift differences for partial waves up to total angular momentum J=4 and laboratory energies below 300 MeV. We find that the CIB effect from OPE dominates in all partial waves. However, the CIB effects from the 2\ensuremathπ model are noticable up to D waves and amount to about 40% of the OPE CIB contribution in some partial waves, at 300 MeV. The effects from 3\ensuremathπ and 4\ensuremathπ contributions are negligible except in 1S0 and 3P2.