{"paper":{"title":"Asymmetric nuclear matter in relativistic mean-field models with isoscalar- and isovector-meson mixing","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE","nucl-ex"],"primary_cat":"nucl-th","authors_text":"Koichi Saito, Myung-Ki Cheoun, Tsuyoshi Miyatsu","submitted_at":"2022-02-14T03:13:55Z","abstract_excerpt":"Using the relativistic mean-field model with nonlinear couplings between the isoscalar and isovector mesons, we study the properties of isospin-asymmetric nuclear matter. Not only the vector mixing, $\\omega_{\\mu}\\omega^{\\mu}\\mathbf{\\rho}_{\\nu}\\mathbf{\\rho}^{\\nu}$, but also the quartic interaction due to the scalar mesons, $\\sigma^{2}\\mathbf{\\delta}^{2}$, is taken into account to investigate the density dependence of nuclear symmetry energy, $E_{\\rm sym}$, and the neutron-star properties. It is found that the $\\delta$ meson increases $E_{\\rm sym}$ at high densities, whereas the $\\sigma$-$\\delta"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.06468","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2202.06468/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}