{"paper":{"title":"Precision Measurements of $A_1^n$ in the Deep Inelastic Regime","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Camsonne, A. Deur, A. Kelleher, A. Kolarkar, A. Lukhanin, A. Narayan, A. Rakhman, A. Saha, A. Shahinyan, B. Moffit, B. Norum, B. Sawatzky, B. Wojtsekhowski, B. Zhao, C. Chen, C. Dutta, C. Hyde, C. W. de Jager, D. Flay, D. McNulty, D. S. Parno, D. Wang, D. W. Higinbotham, E. Chudakov, E. Long, F. Benmokhtar, F. Cusanno, F. Garibaldi, G. B. Franklin, G. D. Cates, G. Jin, G. Kumbartzki, H. F. Ibrahim, H. Gao, H. Yao, J. C. Peng, J. Gomez, J. Huang, J. J. Lerose, J. Katich, J.-P. Chen, K. Allada, L. El Fassi, L. Guo, L. Yuan, M. Canan, M. Friend, M. H. Shabestari, M. M. Dalton, M. Mihovilovi\\v{c}, M. Posik, N. Liyanage, N. Muangma, Nuruzzaman, O. Glamazdin, O. Hansen, P. Solvignon, R. Gilman, R. Lindgren, R. Michaels, R. Subedi, S. Choi, S. Gilad, S. Golge, S. Nanda, S. Riordan, S. \\v{S}irca, T. Averett, T. Holmstrom, V. Mamyan, V. Nelyubin, V. Sulkosky, W. Armstrong, W. A. Tobias, W. Bertozzi, W. Deconinck, W. Korsch, W. Troth, X. Deng, X. Jiang, X. Qian, X. Yan, X. Zhan, X. Zheng (The Jefferson Lab Hall A Collaboration), Y. Oh, Y. Qiang, Y. Wang, Y.-W. Zhang, Y. Ye, Y. Zhang, Z.-E. Meziani, Z. Ye","submitted_at":"2014-06-04T20:46:13Z","abstract_excerpt":"We have performed precision measurements of the double-spin virtual-photon asymmetry $A_1$ on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer. Our data cover a wide kinematic range $0.277 \\leq x \\leq 0.548$ at an average $Q^2$ value of 3.078~(GeV/c)$^2$, doubling the available high-precision neutron data in this $x$ range. We have combined our results with world data on proton targets to extract the ratio of polarized-to-unpolarized parton distribution functions for up quarks and for down quarks in the same kinematic range. Our data ar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.1207","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1406.1207/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"}