{"paper":{"title":"Improved neutron lifetime measurement with UCN$\\tau$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-th"],"primary_cat":"nucl-ex","authors_text":"A. Komives, A. R. Young, A. Saunders, A. T. Holley, B. W. Filippone, C. Cude-Woods, C. L. Morris, C. O'Shaughnessy, C. Swank, C.-Y. Liu, D. J. Salvat, E. B. Dees, E. George, E. I. Sharapov, E. M. Fries, F. M. Gonzalez, J. H. Choi, Jr., J. Ramsey, J. Vanderwerp, K. Hoffman, K. P. Hickerson, L. Hayen, L. J. Broussard, M. A. Hoffbauer, M. Blatnik, M. Dawid, M. Makela, N. B. Callahan, P. Geltenbort, P. Walstrom, R. Musedinovic, R. W. Pattie, S. A. Currie, S. M. Clayton, S. Slutsky, T. Bailey, T. M. Ito, V. Su, W. Fox, W. Uhrich, W. Wei, X. Sun, Z. Tang, Z. Wang","submitted_at":"2021-06-18T22:25:46Z","abstract_excerpt":"We report an improved measurement of the free neutron lifetime $\\tau_{n}$ using the UCN$\\tau$ apparatus at the Los Alamos Neutron Science Center. We counted a total of approximately $38\\times10^{6}$ surviving ultracold neutrons (UCN) after storing in UCN$\\tau$'s magneto-gravitational trap over two data acquisition campaigns in 2017 and 2018. We extract $\\tau_{n}$ from three blinded, independent analyses by both pairing long and short storage-time runs to find a set of replicate $\\tau_{n}$ measurements and by performing a global likelihood fit to all data while self-consistently incorporating t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.10375","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/2106.10375/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"}