2008/08/05 by Y. Fujiwara, Y. FUJIWARA, M. Kohno +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1142/s0217732309000528
published as Mod.Phys.Lett.A24:1031-1034,2009 · 5 pages, no figures
arxiv created 2008/08/05 · openalex publication_date 2009/04/30 · arxiv updated 2009/12/01 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
We reexamine the spin-orbit splitting of [Formula: see text] excited states in terms of the SU 6 quark-model baryon-baryon interaction. The previous folding procedure to generate the Λα spin-orbit potential from the quark-model ΛN LS resonating-group kernel predicted three to five times larger values for ΔE ℓs = E x (3/2 + ) - E x (5/2 + ) in the model FSS and fss2. This time, we calculate Λα LS Born kernel, starting from the LS components of the nuclear-matter G-matrix for the Λ hyperon. This framework makes it possible to take full account of an important P-wave ΛN-ΣN coupling through the antisymmetric LS (-) force involved in the Fermi-Breit interaction. We find that the experimental value, [Formula: see text], is reproduced by the quark-model G-matrix LS interaction with a Fermi-momentum around k F = 1.0 fm -1 , when the model FSS is used in the energy-independent renormalized RGM formalism. On the other hand, the model fss2 gives too large splitting of almost 200 keV, owing to the uncanceled contribution of the scalar-meson exchange LS components.