{"paper":{"title":"Single $\\pi^0$ Production Off Neutrons Bound in Deuteron with Linearly Polarized Photons","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex","hep-ph","nucl-th"],"primary_cat":"nucl-ex","authors_text":"A. Braghieri, A. Denig, A. Kaeser, A. Lazarev, A. Neganov, A. Powell, A. Thie, A. Thomas, B. Krusche, C. Collicott, C. Meier, C. Mullen, C. S. Akondi, C. Sfienti, D. Ghosal, D. Hornidge, D. I. Glazier, D. M. Manley, D. Paudyal, D. P. Watts, D. Werthmuller, E. J. Downie, E. Mornacchi, F. Afzal, F. Cividini, G. Gurevic, G. M. Huber, G. Reicherz, G. Ron, I. Gorodnov, I. I. Strakovsky, I. J. D. MacGregor, I. Supek, J. R. M. Annand, J. Wettig, K. Livingston, K. Spieker, L. Heijkenskjold, L. Witthauer, M. A. Martemianov, M. Bashkanov, M. Biroth, M. Dieterle, M. Gunther, M. I. Ferretti-Bondy, M. Korolija, M. Mocanu, M. Oberle, M. Ostrick, M. Thiel, M. Unverzagt, M. Wolfes, N. Jermann, N. K. Walford, N. S. Borisov, N. Zachariou (A2 Collaboration at MAMI), O. Steffen, P. Achenbach, P. Drexler, P. Otte, P. Pedroni, P. P. Martel, R. Beck, R. L. Workman, R. Miskimen, S. Abt, S. Costanza, S. Fegan, S. Gardner, S. J. D. Kay, S. Lutterer, S. N. Prakhov, S. Wagner, Th. Strub, T. Rostomyan, V. L Kashevarov, V. Sokhoyan, V. V. Kulikov, W. Gradl, W. J. Briscoe, Yu. A. Usov, Z. Ahmed","submitted_at":"2021-03-15T14:15:16Z","abstract_excerpt":"The quasifree $\\overrightarrow{\\gamma} d\\to\\pi^0n(p)$ photon beam asymmetry, $\\Sigma$, has been measured at photon energies, $E_\\gamma$, from 390 to 610 MeV, corresponding to center of mass energy from 1.271 to 1.424 GeV, for the first time. The data were collected in the A2 hall of the MAMI electron beam facility with the Crystal Ball and TAPS calorimeters covering pion center-of-mass angles from 49 to 148$^\\circ$. In this kinematic region, polarization observables are sensitive to contributions from the $\\Delta (1232)$ and $N(1440)$ resonances. The extracted values of $\\Sigma$ have been comp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.08400","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2103.08400/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"}