2000/04/05 by S. S. Hsiao, Shian S. Hsiao, Dah‐Yuu Lu +2 · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Seismic Imaging and Inversion Techniques #nucl-th
paper · pdf · doi:10.1103/physrevc.61.068201
published as Phys.Rev. C61 (2000) 068201 · 11 pages, 4 figures. to appear in Phys. Rev. C
arxiv created 2000/04/05 · openalex publication_date 2000/05/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The question of pseudovector versus pseudoscalar coupling schemes for the kaon-hyperon-nucleon interaction is reexamined for the reaction \ensuremathγ\stackrel\ensuremath→pK+\ensuremathΛ in several isobaric models. These models typically include Born terms, K* and K1 exchanges in the t channel, and a few different combinations of spin-1/2 baryon resonances in the s and u channels. The coupling constants are obtained by fitting to a large data set. We find that both pseudoscalar and pseudovector couplings can allow for a satisfactory description of the present database. The resulting coupling constants, g_K\ensuremathΛN and g_K\ensuremathΣN, in the pseudovector coupling scheme are smaller than those predicted using flavor SU(3) symmetry, but consistent with the values obtained in a QCD sum rule calculation.