{"paper":{"title":"First Measurement of the Neutral Current Excitation of the Delta Resonance on a Proton Target","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Coppens, A. Lung, A. Micherdzinska, B. Quinn, C. A. Davis, C. Ellis, C. Furget, C. L. Capuano, D. Gaskell, D. H. Beck, D. S. Armstrong, D. T. Spayde, E. J. Beise, E. Voutier, F. Benmokhtar, G0 Collaboration: D. Androic, 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. 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. K. Phillips, S. L. Bailey, S. P. Wells, 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":"2012-12-07T15:57:41Z","abstract_excerpt":"The parity-violating asymmetry arising from inelastic electron-nucleon scattering at backward angle (~95 degrees) near the Delta(1232) resonance has been measured using a hydrogen target. From this asymmetry, we extracted the axial transition form factor G^A_{N\\Delta}, a function of the axial Adler form factors C^A_i. Though G^A_{N\\Delta} has been previously studied using charged current reactions, this is the first measurement of the weak neutral current excitation of the Delta using a proton target. For Q^2 = 0.34 (GeV/c)^2 and W = 1.18 GeV, the asymmetry was measured to be -33.4 \\pm (5.3)_{"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.1637","kind":"arxiv","version":1},"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"}