2005/09/27 by G. Erkol, Th. A. Rijken, R. G. E. Timmermans · 18 citations
Mathematics · Physics and Astronomy · #Boson #Constant (computer programming) #Coupling constant #Isoscalar #Mathematical physics #Mathematics #Meson #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics of Superconductivity and Magnetism #QCD sum rules #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Scalar (mathematics) #Sigma #nucl-th
paper · pdf · doi:10.1103/physrevc.72.035209
published in Physical Review C 72(3) (American Institute of Physics) · 11 pages, 4 figures
openalex publication_date 2005/09/27 · arxiv created 2006/03/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The external-field QCD sum rules method is used to evaluate the coupling constant of the light isoscalar-scalar meson (``\ensuremathσ'' or \ensuremathε) to the nucleon. The contributions that come from the excited nucleon states and the response of the continuum threshold to the external field are calculated. The obtained value of the coupling constant is compatible with the large value required in one-boson exchange potential models of the two-nucleon interaction.