2019/01/18 by R. Shyam, Shyam, R., K. Tsushima +1
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1901.06090
openalex publication_date 2019/01/18 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28
We investigate within a quark-meson coupling (QMC) model, the structure of the bound Ξ- hypernucleus 15 Ξ-C (14N + Ξ-), which has been observed in a recent analysis of the KEK-E373 experiment. In the QMC model, light quarks in nonoverlapping nucleon and Ξ- bags interact self-consistently with isoscalar-scalar (σ), isoscalar-vector (ω), and isovector-vector (ρ) mesons in the mean field approximation. The parameters of the model (quark-meson coupling constants and masses) are mostly fixed from the nuclear matter saturation properties. The QMC model closely reproduces the separation energies of the two Ξ- hyperon states in 15 Ξ-C reported in the KEK-E373 analysis, and identifies their quantum numbers. We also make predictions for the cross sections for the production of the 15 Ξ-C hypernuclear specta in the (K-, K+) reaction on a 15O target within a covariant effective Lagrangian model using the Ξ- bound state spinors obtained within the same QMC model.