{"paper":{"title":"Prospects for Pentaquark Baryon Search with the Upgraded LEPS2 Facility","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"hep-ex","authors_text":"A. Higashi, A.O. Tokiyasu, B. Yan, C. Rangacharyulu, C. Yoshida, G. Kojima, H. Katsuragawa, H. Kohri, H. Ohkuma, H. Ohnishi, H. Shimizu, J.K. Ahn, K. Mizutani, K. Nishi, K. Watanabe, M. Miyabe, M. Niiyama, M. Sumihama, M. Yosoi, N. Muramatsu, R. Kobayakawa, S. Ajimura, S. Dat'e, S. Suzuki, S. Tanaka, S.Y. Ryu, T. Hashimoto, T.H. Nam, T. Hotta, T. Ishikawa, T. Nakano, T. Yorita, Y. Asano, Y. Ma, Y. Ohashi, Y. Sada","submitted_at":"2025-03-04T11:47:40Z","abstract_excerpt":"We present prospects for the $\\Theta^+$ pentaquark baryon search using the newly constructed LEPS2 facility at SPring-8. The LEPS2 detector system features significant improvements in acceptance for multi-particle final states compared to previous experiments. Our search employs two complementary strategies: direct production in the $\\gamma n \\to K^-\\Theta^+$ reaction using a liquid deuterium target with a photon beam up to 2.4 GeV, and $\\bar{K}^{*0}$-associated $\\Theta^+$ production using a liquid hydrogen target with a photon beam up to 2.9 GeV. The extended acceptance covers both forward an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.02528","kind":"arxiv","version":1},"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/2503.02528/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"}