{"paper":{"title":"First observation of in-medium effects on phase space distributions of antikaons measured in proton-nucleus collisions","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Foerster, A. Wagner, B. Kampfer, B. Kohlmeyer, C. Sturm, E. Grosse, E. Schwab, F. Dohrmann, F. Laue, F. Uhlig, G. Surowka, H. Stroebele, H.W. Barz, I. Boettcher, L. Naumann, M. Debowski, M. Menzel, P. Koczon, P. Senger, W. Scheinast, W. Walus, Y. Shin","submitted_at":"2005-12-20T16:04:15Z","abstract_excerpt":"Differential production cross sections of $K^{\\pm}$ mesons have been measured in $p$ + C and $p$ + Au collisions at 1.6, 2.5 and 3.5 GeV proton beam energy. At beam energies close to the production threshold, the $K^-$ multiplicity is strongly enhanced with respect to proton-proton collisions. According to microscopic transport calculations, this enhancement is caused by two effects: the strangeness exchange reaction $NY \\to K^- NN$ and an attractive in-medium $K^-N$ potential at saturation density."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0512028","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/0512028/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"}