{"paper":{"title":"Search for $\\eta'$ bound nuclei in the $^{12}{\\rm C}(\\gamma,p)$ reaction with simultaneous detection of decay products","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Tokiyasu, C. Rangacharyulu, C. Yoshida, E. A. Strokovsky, H. Goto, H. Hamano, H. Ikuno, H. Katsuragawa, H. Nagahiro, H. Ohnishi, H. Shimizu, H. Yamazaki, I. Jaegle, J. K. Ahn, J. M. Jo, J. Y. Chen, K. Hicks, K. Mizutani, K. Ozawa, K. Shiraishi, M. L. Chu, M. Miyabe, M. Niiyama, M. Sasagawa, M. Sumihama, M. Yosoi (for the LEPS2/BGOegg Collaboration), N. Muramatsu, N. Tomida, Q. H. He, R. Shirai, R. Yamazaki, S. Dat\\'e, S. Kido, S. Masumoto, S. Suzuki, S. Tanaka, S. Y. Ryu, T. Gogami, T. Hashimoto, T. Hiraiwa, T. Hotta, T. Ishikawa, T. Maruyama, T. Nakamura, T. Nakano, T. Nam, T. N. T. Ngan, T. Ohta, T. Shibukawa, T. Ueda, T. Yorita, W. C. Chang, Y. Honda, Y. Inoue, Y. Kasamatsu, Y. Kon, Y. Matsumura, Y. Nozawa, Y. Ohashi, Y. Sada, Y. Sugaya, Y. Tsuchikawa, Y. Yanai","submitted_at":"2020-05-07T13:21:13Z","abstract_excerpt":"We measured missing mass spectrum of the $^{12}{\\rm C}(\\gamma,p)$ reaction for the first time in coincidence with potential decay products from $\\eta'$ bound nuclei. We tagged an ($\\eta+p$) pair associated with the $\\eta'N\\to\\eta N$ process in a nucleus. After applying kinematical selections to reduce backgrounds, no signal events were observed in the bound-state region. An upper limit of the signal cross section in the opening angle $\\cos\\theta^{\\eta p}_{lab}<-0.9$ was obtained to be 2.2 nb/sr at the 90$\\%$ confidence level. It is compared with theoretical cross sections, whose normalization "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.03449","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/2005.03449/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"}