{"paper":{"title":"Backward-angle photoproduction of $\\omega$ and $\\eta'$ mesons from protons at $E_{\\gamma}=1.5-3.0$ GeV","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A.Tokiyasu, C.Rangacharyulus, D.S.Ahn, E.A.Strokovsky, H.Fujimura, H.Kawai, H.Kohri, H.Noumi, H.Shimizu, J.D.Parker, J.K.Ahn, J.Y.Chen, K.Hicks, K.Imai, K.Mase, K.Suzuki, K.Tanida, M.J.Kim, M.Miyabe, M.Niiyama, M.Oka, M.Sumihama, M.Uchida, M.Yosoi, N.Muramatsu, P.J.Lin, R.Yamamura, S.Ajimura, S.Date, S.Fukui, S.H.Hwang, S.Y.Ryu, T.Hiraiwa, T.Hotta, T.Ishikawa, T.Nakano, T.Ohta, T.Saito, T.Sawada, T.Tomioka, T.Tsunemi, T.Yorita, W.C.Chang, Y.Kato, Y.Kon, Y.Maeda, Y.Morino, Y.Nakatsugawa, Y.Ohashi, Y.Sugaya","submitted_at":"2013-06-13T06:17:25Z","abstract_excerpt":"We report the measurement of differential cross sections for $\\omega$ and $\\eta'$ photoproduction from protons at backward angles ($-1.0<\\cos\\Theta_{C.M}^{X}<-0.8$) using linearly polarized photons at $E_{\\gamma}=$$1.5-3.0$ GeV. Differential cross sections for $\\omega$ mesons are larger than the predicted $u$-channel contribution in the energy range $2.0\\leq\\sqrt{s}\\leq2.4$ GeV. The differential cross sections for $\\omega$ and $\\eta'$ mesons become closer to the predicted $u$-channel contribution at $\\sqrt{s}>2.4$ GeV. A bump structure in the $\\sqrt{s}$ dependence of the differential cross sec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.3031","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":""},"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"}