{"paper":{"title":"Accurate Test of Chiral Dynamics in the \\boldmath$\\vec{\\gamma} p \\rightarrow \\pi^0p$ Reaction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Braghieri, A. Koulbardis, A. M. Bernstein, A. Mushkarenkov, A. Polonski, A. Starostin, A. Thomas, A. T. Laffoley, B. Krusche, B. M. K. Nefkens, B. Oussena, C. Fernandez-Ramirez, D. G. Middleton, D. Hornidge, D. I. Glazier, D. Krambrich, D. Mekterovic, D. M. Manley, D. P. Watts, D. Werthmueller, E. F. McNicoll, E. Heid, E. J. Downie, F. Pheron, H. Berghaeuser, H. J. Arends, I. Jaegle, I. J. D. MacGregor, I. Keshelashvili, I. Supek, J. Mancell, J. R. M. Annand, J. Robinson, K. Livingston, K. W. Moores, L. Tiator, L. V. Filkov, L. Witthauer, M. Dieterle, M. Hilt, M. H. Sikora, M. Korolija, M. Oberle, M. Ostrick, M. Thiel, M. Unverzagt, O. Jahn, P. Aguar Bartolome, P. B. Otte, P. Drexler, P. Hall Barrientos, P. Pedroni, R. Beck, R. Kondratiev, S. Cherepnya, S. Kruglov, S. Micanovic, S. Prakhov, S. Scherer, S. Schumann, T. C. Jude, T. Rostomyan, V. Bekrenev, V. Lisin, V. L. Kashevarov, V. Metag, W. J. Briscoe","submitted_at":"2012-11-23T13:10:15Z","abstract_excerpt":"A precision measurement of the differential cross sections $d\\sigma/d\\Omega$ and the linearly polarized photon asymmetry $\\Sigma \\equiv (d\\sigma_\\perp - d\\sigma_\\parallel) \\slash (d\\sigma_\\perp + d\\sigma_\\parallel)$ for the $\\vec{\\gamma} p \\rightarrow \\pi^0p$ reaction in the near-threshold region has been performed with a tagged photon beam and almost $4\\pi$ detector at the Mainz Microtron. The Glasgow-Mainz photon tagging facility along with the Crystal Ball/TAPS multi-photon detector system and a cryogenic liquid hydrogen target were used. These data allowed for a precise determination of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.5495","kind":"arxiv","version":3},"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"}