{"paper":{"title":"Neutron Lifetime and Axial Coupling Connection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Alberto Sirlin, Andrzej Czarnecki, William J. Marciano","submitted_at":"2018-02-06T05:30:04Z","abstract_excerpt":"Experimental studies of neutron decay, $n\\to pe\\bar\\nu$, exhibit two anomalies. The first is a 8.6(2.1)s, roughly $4\\sigma$ difference between the average beam measured neutron lifetime, $\\tau_n^\\text{beam}=888.0(2.0)$s, and the more precise average trapped ultra cold neutron determination, $\\tau_n^\\text{trap}=879.4(6)$s. The second is a $5\\sigma$ difference between the pre2002 average axial coupling, $g_A$, as measured in neutron decay asymmetries $g_A^\\text{pre2002}=1.2637(21)$, and the more recent, post2002, average $g_A^\\text{post2002}=1.2755(11)$, where, following the UCNA collaboration d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.01804","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":""},"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"}