{"paper":{"title":"Final Analysis of Proton Form Factor Ratio Data at $\\mathbf{Q^2 = 4.0}$, 4.8 and 5.6 GeV$\\mathbf{^2}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"nucl-ex","authors_text":"A. Glamazdin, A. J. R. Puckett, A. Saha, B. A. Raue, B. B. Wojtsekhowski, B. D. Milbrath, C. Cavata, C.-C. Chang, C. F. Perdrisat, C. Glashausser, C. Salgado, C. W. de Jager, D. Higinbotham, D. J. Margaziotis, D. Lhuillier, D. Neyret, E. Chudakov, E. J. Brash, E. Tomasi-Gustafsson, F. Benmokhtar, F. Garibaldi, F. Marie, G. J. Lolos, G. Kumbartzki, G. M. Huber, G. M. Urciuoli, H. Voskanyan, I. Sitnik, J. Gao, J. Gomez, J. J. Lerose, J.-O. Hansen, J. P. Chen, J. R. Calarco, K. A. Aniol, K. G. Fissum. H. Fonvieille, K. McCormick, K. M. Kramer, K. Wijesooriya, L. Bimbot, L. Pentchev, L. Todor, L. Zhu (The Jefferson Lab Hall A Collaboration), M. B. Epstein, M. Iodice, M. Khandaker, M. K. Jones, M. Rvachev, N. Liyanage, N. M. Piskunov, O. Gayou, P. Markowitz, R. A. Lindgren, R. De Leo, R. D. Ransome, R. Endres, R. Gilman, R. Michaels, R. Roch\\'e, S. Dieterich, S. Escoffier, S. Frullani, S. Gilad, S. K. Nanda, S. Kozlov, S. Sirca, S. Strauch, T. Averett, T. Chang, V. Punjabi, W. Bertozzi, X. Jiang, X. Zheng, Z. Chai","submitted_at":"2011-02-28T18:52:02Z","abstract_excerpt":"Precise measurements of the proton electromagnetic form factor ratio $R = \\mu_p G_E^p/G_M^p$ using the polarization transfer method at Jefferson Lab have revolutionized the understanding of nucleon structure by revealing the strong decrease of $R$ with momentum transfer $Q^2$ for $Q^2 \\gtrsim 1$ GeV$^2$, in strong disagreement with previous extractions of $R$ from cross section measurements. In particular, the polarization transfer results have exposed the limits of applicability of the one-photon-exchange approximation and highlighted the role of quark orbital angular momentum in the nucleon "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.5737","kind":"arxiv","version":4},"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"}