{"paper":{"title":"Photoproduction of $\\eta$-mesons off C and Cu nuclei for photon energies below 1.1 GeV","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Iijima, A. Kato, F. Miyahara, H. Fukasawa, H. Kanda, H. Kato, H. Shimizu, H. Yamazaki, H.Y. Yoshida, J. Kasagi, K. Hirota, K. Kino, K. Maeda, K. Nawa, K. Okamura, K. Satou, K. Suzuki, M. Itaya, M. Moriya, M. Sengoku, M. Yamamoto, O. Konno, S. Suzuki, S. Takita, T. Fujinoya, T. Ishikawa, T. Iwata, T. Katsuyama, T. Kawamura, T. Kinoshita, T. Maruyama, T. Michigami, T. Nakabayashi, T. Noma, T. Sasaki, T. Takahashi, T. Terasawa, T. Yorita, Y. Aruga, Y. Ito, Y. Saitoh, Y. Tajima, Y. Yoshida","submitted_at":"2005-09-15T16:55:29Z","abstract_excerpt":"The $\\eta$-meson photoproduction cross sections have been measured on the C and Cu targets for the photon energies between 600 and 1100 MeV to investigate the behavior of the $S_{11}$(1535) resonance in a nucleus. The excitation functions of the cross section as well as the angular and momentum distributions of $\\eta$-mesons are in quantitative agreement with the Quantum Molecular Dynamics (QMD) model calculations in which the $\\eta$-meson emission processes other than the $S_{11}$(1535) resonance are also incorporated as proposed in the $\\eta$-MAID model. It is shown that the excitation of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0509022","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/0509022/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"}