{"paper":{"title":"Effective mass and decay of $\\Theta^+$ in nuclear matter in quark-meson coupling model","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"C. H. Hyun, C. Y. Ryu, J. Y. Lee, S. W. Hong","submitted_at":"2005-06-16T05:26:30Z","abstract_excerpt":"The in-medium mass of a $\\thetaplus$, $\\mtheta^*$, in cold symmetric nuclear matter is calculated by using the quark-meson coupling model. The $\\Theta^+$ is treated as an MIT bag with the quark content $uudd\\bar s$. Bag parameters for a free $\\thetaplus$ are fixed to reproduce the observed mass of the $\\thetaplus$. In doing so, we use three different values of the $s$-quark mass since the mass of the $s$-quark is not well known. As usual, the strengths of the $u$ and $d$ quark couplings to $\\sigma$- and $\\omega$-meson fields are determined to fit the nuclear saturation properties. However, the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/0506052","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/nucl-th/0506052/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"}