{"paper":{"title":"Experimental Signature of Medium Modifications for rho and omega Mesons in the 12 GeV p + A Reactions","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"F. Sakuma, H. En'yo, H. Funahashi, H. Hamagaki, H. Kanda, J. Chiba, K. H. Tanaka, K. Miwa, K. Ozawa, M. Ieiri, M. Ishino, M. Kitaguchi, M. Naruki, M. Sekimoto, M. Togawa, O. Sasaki, R. Muto, S. Mihara, S. Yamada, S. Yokkaichi, T. Miyashita, T. Murakami, T. Nakura, T. Tabaru, Y. Fukao, Y. Yoshimura","submitted_at":"2005-04-20T10:44:57Z","abstract_excerpt":"The invariant mass spectra of e+e- pairs produced in 12-GeV proton-induced nuclear reactions are measured at the KEK Proton-Synchrotron. On the low-mass side of the omega meson peak, a significant enhancement over the known hadronic sources has been observed. The mass spectra, including the excess, are well reproduced by a model that takes into account the density dependence of the vector meson mass modification, as theoretically predicted."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0504016","kind":"arxiv","version":4},"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/0504016/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"}