{"paper":{"title":"Final results for the neutron $\\beta$-asymmetry parameter $A_0$ from the UCNA experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"nucl-ex","authors_text":"A. Garcia, A. Hawari, A. Knecht, A.L. Sallaska, A. Perez Galvan, A. Pichlmaier, A.R. Young, A. Saunders, A.T. Holley, B. Allgeier, B.A. Zeck, B. Hona, B. Plaster, B. Tipton, B. VornDick, B. Wehring, B.W. Filippone, C. Cude-Woods, C.L. Morris, C. Servicky, C. Swank, C. Terai, C. Wrede, C.-Y. Liu, D.B. Berguno, D.G. Phillips, D.J. Clark, D.J. Salvat, D. Melconian, D. Smith, E. Adamek, E.B. Dees, E.I. Sharapov, E. Tatar, G.E. Hogan, G. Swift, H.O. Back, H. Yan, J. Anaya, J.C. Ramsey, J.G. Boissevain, J. Hoagland, J. Liu, J. Wexler, J.W. Martin, J. Yuan, K. Kirch, K.P. Hickerson, K. Sabourov, L.J. Broussard, M. A.-P. Brown, M. Blatnik, M. Hino, M.L. Pitt, M. Makela, M.P. Mendenhall, M. Utsuro, N. Meier, N. Nouri, P. Geltenbort, R.B. Vogelaar, R. Carr, R. Hill, R. Hong, R. Mortensen, R. Picker, R. Rios, R.R. Mammei, R. Russell, R. Schmid, R.W. Pattie, S.A. Hoedl, S. Clayton, S. Currie, S.D. Moore, S. Du, S. Hasan, S.J. Seestrom, S. Kitagaki, S.K. Lamoreaux, S.K.L. Sjue, S. Nepal, S. Slutsky, T.J. Bowles, T. Kawai, T.M. Ito, T. Womack, W.E. Sondheim, W. Teasdale, X. Ding, X. Sun, Y. Bagdasarova, Y.P. Xu, Z. Wang","submitted_at":"2019-04-10T20:51:10Z","abstract_excerpt":"The UCNA experiment was designed to measure the neutron $\\beta$-asymmetry parameter $A_0$ using polarized ultracold neutrons (UCN). UCN produced via downscattering in solid deuterium were polarized via transport through a 7 T magnetic field, and then directed to a 1 T solenoidal electron spectrometer, where the decay electrons were detected in electron detector packages located on the two ends of the spectrometer. A value for $A_0$ was then extracted from the asymmetry in the numbers of counts in the two detector packages. We summarize all of the results from the UCNA experiment, obtained duri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.05432","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1904.05432/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"}