{"paper":{"title":"Precision Determination of the Neutral Weak Form Factor of $^{48}$Ca","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"nucl-ex","authors_text":"23 M. McCaughan, A. Camsonne, A. Deshpande, A. Narayan, A. Rathnayake, A. Shahinyan, A. Yoon, A. Zec, B. Blaikie, B. Pandey, B. Quinn, B.T. Reed, B. Wojtsekhowski, B. Yale, C. Ayerbe Gayoso, C. Clarke, C. Feldman, C. Gal, C. Ghosh, C. Jantzi, C.J. Horowitz, C. Keppel, C. Metts, C. Palatchi, D. Adhikari, D. Androic, D. Bhatta Pathak, D. Bhetuwal, D.C. Jones, D. Dutta (9), D.E. King, D. Gaskell, D. McNulty, D. Meekins, D. Nikolaev, D.S. Armstrong, E. Fuchey, E.W. Wertz, F. Hauenstein, G.D. Cates, G. Leverick, G.M. Urciuoli, H. Albataineh, H. Bhatt, H. Liu, I. Halilovic, J. Boyd, J.C. Cornejo, J.F. Benesch, J. Mammei, J. Napolitano, J.-O. Hansen, J. Pan, J. Zhang, K.A. Aniol, K.D. Paschke, K.S. Kumar, M. Gericke, M.L. Pitt, M. M. Dalton, M. Mihovilovic, M.M. Mondal, M.N.H. Rashad, M. Petrusky, M. Thiel, N. Lashley-Colthirst, N. Liyanage, O. Hassan, P. Datta, P.E. Reimer, P.M. King, P. Souder, Q. Campagna, R. Mammei, R. Michaels, R. Radloff, R. Richards, R.S. Beminiwattha, S. Covrig Dusa, S. Jian, S. Johnston, S. Kakkar, S. Katugampola, S.K. Barcus, S. Park, S. Premathilake, S. Rahman, S. Riordan, S. Seeds, T. Averett, T. Gautam, T. Kutz, T. Ye, V. Bellini, V. Owen, W. Henry, W. Xiong, W. Zhang, X. Zheng, Y. Chen, Y.R. Roblin, Y. Tian","submitted_at":"2022-05-23T19:46:18Z","abstract_excerpt":"We report a precise measurement of the parity-violating asymmetry $A_{\\rm PV}$ in the elastic scattering of longitudinally polarized electrons from $^{48}{\\rm Ca}$. We measure $A_{\\rm PV} =2668\\pm 106\\ {\\rm (stat)}\\pm 40\\ {\\rm (syst)}$ parts per billion, leading to an extraction of the neutral weak form factor $F_{\\rm W} (q=0.8733$ fm$^{-1}) = 0.1304 \\pm 0.0052 \\ {\\rm (stat)}\\pm 0.0020\\ {\\rm (syst)}$ and the charge minus the weak form factor $F_{\\rm ch} - F_{\\rm W} = 0.0277\\pm 0.0055$. The resulting neutron skin thickness $R_n-R_p=0.121 \\pm 0.026\\ {\\rm (exp)} \\pm 0.024\\ {\\rm (model)}$~fm is re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.11593","kind":"arxiv","version":2},"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/2205.11593/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"}