{"paper":{"title":"Indication of a strange tribaryon S^+ from the ^4He(stopped K^-,n) reaction","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A.M. Vinodkumar, B.Quinn, D. Tomono, E. Widmann, G. Franklin, H. Bhang, H. Outa, H. So, K. Gomikawa, K. Ishikawa, K. Itahashi, K. Suzuki, M. Iwasaki, M. Sato, M. Shindo, P. Strasser, R.S. Hayano, S. Ishimoto, S. Okada, S. Suzuki, T. Hayashi, T. Katayama, T. Nakamura, T. Sugimoto, T. Suzuki, T. Yamazaki, T. Yoneyama, Y. Kondo, Y. Matsuda","submitted_at":"2003-10-17T13:12:48Z","abstract_excerpt":"We measured the neutron time-of-flight spectrum in the ^4He(stopped K^-, n) reaction by stopping negative kaons in a superfluid helium target.\n  A clear enhancement was observed in the neutron spectrum, which indicates the formation of a strange tribaryon of charge +1 with a mass and width of M = 3141 +/- 3 (stat.) +4/-1 (sys.) MeV/c^2 and G < 23 MeV/c^2. This state, denoted as S^+(3140), is about 25 MeV/c^2 higher than the previously observed S^0(3115) T=1."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0310018","kind":"arxiv","version":2},"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-ex/0310018/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"}