{"paper":{"title":"New Precision Limit on the Strange Vector Form Factors of the Proton","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Camsonne, A. Deur, A. Giusa, A. Glamazdin, A. Narayan, A. Rakhman, A. Saha, B. Quinn, B. Sawatzky, B. Waidyawansa, B. Wojtsekhowski, B. Zhao, C. Dutta, C. E. Hyde, C. M. Jen, C. M. Sutera, C. Munoz-Camacho, C. W. de Jager, D. G. Meekins, D. Jones, D. Margaziotis, D. McNulty, D. Parno, D. S. Armstrong, D. Wang, D. W. Higinbotham, E. Chudakov, E. Cisbani, E. Long, F. Benmokhtar, F. Garibaldi, F. Meddi, G. B. Franklin, G. D. Cates, G. Jin, G. M. Urciuoli, G. Russo, HAPPEX collaboration: Z. Ahmed, H. Kang, H. Yao, J. Arrington, J. Benesch, J. H. Lee, J. Huang, J. J. Lerose, J.-P. Chen, J. Roche, J. Rubin, J. Wexler, K. A. Aniol, K. Allada, K. D. Paschke, K. E. Myers, K. Grimm, K. Pan, K. Rider, K. Saenboonruang, K. S. Kumar, L. Mercado, L. Ye, M. Canan, M. Friend, M. Huang, M. M. Dalton, M. Mihovilovic, M. Sperduto, N. Liyanage, N. Muangma, Nuruzzaman, O. Hansen, P. A. Souder, P. Baturin, P. Decowski, P. E. Reimer, P. King, R. Beminiwattha, R. De Leo, R. Holmes, R. Michaels, R. Silwal, R. Subedi, R. Suleiman, R. Wilson, S. Frullani, S. Golge, S. Kowalski, S. K. Phillips, S. Nanda, S. Riordan, S. Sirca, T. Holmstrom, V. Bellini, V. Nelyubin, V. Sulkosky, W. A. Tobias, W. Deconinck, X. Deng, X. Qian, X. Yan, X. Zhan, X. Zheng, Y. Oh, Y. Qiang, Z.-E. Meziani","submitted_at":"2011-07-05T16:08:33Z","abstract_excerpt":"The parity-violating cross-section asymmetry in the elastic scattering of polarized electrons from unpolarized protons has been measured at a four-momentum transfer squared Q2 = 0.624 GeV and beam energy E =3.48 GeV to be A_PV = -23.80 +/- 0.78 (stat) +/- 0.36 (syst) parts per million. This result is consistent with zero contribution of strange quarks to the combination of electric and magnetic form factors G_E^s + 0.517 G_M^s = 0.003 +/- 0.010 (stat) +/- 0.004 (syst) +/- 0.009 (ff), where the third error is due to the limits of precision on the electromagnetic form factors and radiative corre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.0913","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"}