{"paper":{"title":"Transverse Beam Spin Asymmetries at Backward Angles in Elastic Electron-Proton and Quasi-elastic Electron-Deuteron Scattering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph","nucl-th"],"primary_cat":"nucl-ex","authors_text":"10 S. K. Phillips, A. Coppens, A. Lung, A. Micherdzinska, B. Pasquini, B. Quinn, C. A. Davis, C. Ellis, C. Furget, C. L. Capuano, D. Androi\\'c, D. Gaskell, D. H. Beck, D. S. Armstrong, D. T. Spayde, E. J. Beise, E. Voutier, F. Benmokhtar, G. Flores, G. Franklin, G. Guillard, G. R. Smith, H. Breuer, H. Mkrtchyan, J. Arvieux, J. Benesch, J. Birchall, J. Grames, J. Hansknecht, J. Liu, J. Mammei, J. Roche, J. Schaub, J.-S. Real, J. W. Martin, L. Bimbot, L. Lee, M. K. Jones, M. L. Pitt, M. Mihovilovic, M. Muether, M. Poelker, M. Stutzman, M. T. W. Gericke, M. Vanderhaeghen, M. Versteegen, N. Simicevic, P. Bosted, P. M. King, P. Pillot, P. Roos, R. D. McKeown, R. Suleiman, S. A. Page, S. A. Wood, S. E. Williamson, S. F. Pate, S. Kox, S. L. Bailey, S. P. Wells, The G0 Collaboration, T. Horn, T. Seva, V. Papavassiliou, V. Tadevosyan, W. D. Ramsay, W. Korsch, W. T. H. van Oers, W. Vulcan, Y.-C. Chao","submitted_at":"2011-03-18T17:11:18Z","abstract_excerpt":"We have measured the beam-normal single-spin asymmetries in elastic scattering of transversely polarized electrons from the proton, and performed the first measurement in quasi-elastic scattering on the deuteron, at backward angles (lab scattering angle of 108 degrees) for Q2 = 0.22 GeV^2/c^2 and 0.63 GeV^2/c^2 at beam energies of 362 MeV and 687 MeV, respectively. The asymmetry arises due to the imaginary part of the interference of the two-photon exchange amplitude with that of single photon exchange. Results for the proton are consistent with a model calculation which includes inelastic int"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.3667","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"}