{"paper":{"title":"Differential cross section and photon-beam asymmetry for the gamma p -> pi- Delta++(1232) reaction at forward pi- angles for Egamma=1.5-2.95 GeV","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Hosaka, C. Rangacharyulu, D.S. Ahn, E.A. Strokovsky, H. Ejiri, H. Fujimura, H. Kohri, H. Noumi, H. Shimizu, H.S. Lee, J.D. Parker, J.K. Ahn, J.Y. Chen, K. Hicks, K. Imai, K. Joo, M. Fujiwara, M. Miyabe, M. Niiyama, M. Oka, M. Sumihama, M. Uchida, M. Ungaro, M. Yosoi, N. Muramatsu, R.Y. Ryu, S. Date, S. Fukui, S.H. Hwang, S.H. Shiu, S.I. Nam, S.Y. Wang, T. Hotta, T. Ishikawa, T. Mibe, T. Nakano, T. Ohta, T. Sawada, T. Tsunemi, W.C. Chang, W. Gohn, Y. Kato, Y. Kon, Y. Maeda, Y. Morino, Y. Nakatsugawa, Y. Ohashi, Y. Sugaya, Y. Yanai","submitted_at":"2018-01-24T08:11:19Z","abstract_excerpt":"Differential cross sections and photon-beam asymmetries for the gamma p -> pi- Delta++(1232) reaction have been measured for 0.7<cos(theta)<1 and Egamma=1.5-2.95 GeV at SPring-8/LEPS. The first-ever high statistics cross section data are obtained in this kinematical region, and the asymmetry data for 1.5<Egamma(GeV)<2.8 are obtained for the first time. This reaction has a unique feature for studying the production mechanisms of a pure $u\\bar{u}$ quark pair in the final state from the proton. Although there is no distinct peak structure in the cross sections, a non-negligible excess over the th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07900","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":""},"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"}