{"paper":{"title":"Isovector potential of $\\Sigma$ in nuclei and neutron star matter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"A. Ohnishi, K. Tsubakihara, T. Harada","submitted_at":"2014-02-05T09:13:31Z","abstract_excerpt":"We determine the coupling constants of $\\Sigma$ hyperon with mesons in relativistic mean field (RMF) models using $\\Sigma^-$ atomic shift data and examine the effects of $\\Sigma$ on the neutron star maximum mass. We find that we need to reduce the vector-isovector meson coupling with $\\Sigma$ ($g_{\\rho\\Sigma}$) from the value constrained by the SU(3)v symmetry in order to explain the $\\Sigma^-$ atomic shifts for light symmetric and heavy asymmetric nuclei simultaneously. With the atomic shift fit value of $g_{\\rho\\Sigma}$, $\\Sigma^-$ can emerge in neutron star matter overcoming the repulsive i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.0979","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}