{"paper":{"title":"Local chiral interactions, the tritium Gamow-Teller matrix element, and the three-nucleon contact term","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"A. Baroni, A. Kievsky, A. Lovato, L.E. Marcucci, L. Girlanda, M. Piarulli, M. Viviani, R. B. Wiringa, R. Schiavilla, S. Pastore, Steven C. Pieper","submitted_at":"2018-06-26T23:23:35Z","abstract_excerpt":"The Gamow-Teller (GT) matrix element contributing to tritium $\\beta$ decay is calculated with trinucleon wave functions obtained from hyperspherical-harmonics solutions of the Schr\\\"odinger equation with the chiral two- and three-nucleon interactions including $\\Delta$ intermediate states that have recently been constructed in configuration space. Predictions up to N3LO in the chiral expansion of the axial current (with $\\Delta$'s) overestimate the empirical value by 1--4 \\%. By exploiting the relation between the low-energy constant (LEC) in the contact three-nucleon interaction and two-body "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.10245","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":""},"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"}