{"paper":{"title":"High statistics study of the reaction $\\gamma p\\to p\\;2\\pi^0$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A.B. Gridnev, A. Roy, A. S\\\"ule, A. Thiel, A.V. Anisovich, A.V. Sarantsev, A. Wilson, B. Bantes, B. Krusche, B. Metsch, Ch. Funke, Ch. Schmidt, Ch. Wendel, D. Bayadilov, D. Elsner, D. Novinsky, D. Piontek, D. Trnka, D. Walther, E. Gutz, E. Klempt, F. Frommberger, Frank Klein, Friedrich Klein, H. Dutz, H. Kalinowsky, H. L\\\"ohner, H. Schmieden, H. van Pee, I. Horn, I. Jaegle, I.V. Lopatin, J.C.S. Bacelar, J.G. Messchendorp, J. Junkersfeld, L. Pant, M. Fuchs, M. Kotulla, M. Lang, M. Nanova, M. Ostrick, M. Pfeiffer, O. Bartholomy, Ph. Hoffmeister, R. Beck, R. Castelijns, R. Ewald, R. Gregor, R. Novotny, R. Varma, S. Kammer, S. Lugert, S. Shende, T. Mertens, T. Seifen, T. Szczepanek, U. Thoma, V.A. Nikonov, V. Crede, V. Kleber, V. Metag, V. Sokhoyan, V.V. Sumachev, W. Hillert, Y.A. Beloglazov","submitted_at":"2015-07-09T12:50:51Z","abstract_excerpt":"The photoproduction of 2$\\pi^0$ mesons off protons was studied with the Crystal Barrel/TAPS experiment at the electron accelerator ELSA in Bonn. The energy of photons produced in a radiator was tagged in the energy range from 600\\,MeV to 2.5\\,GeV. Differential and total cross sections and $p\\pi^0\\pi^0$ Dalitz plots are presented. Part of the data was taken with a diamond radiator producing linearly polarized photons, and beam asymmetries were derived. Properties of nucleon and $\\Delta$ resonances contributing to the $p\\pi^0\\pi^0$ final state were determined within the BnGa partial wave analysi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02488","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"}