{"paper":{"title":"Semileptonic Decays of $\\Lambda \\to p \\ell^{-} \\bar{\\nu}_{\\ell}$ in the Light-Front Dynamics","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex","hep-th"],"primary_cat":"hep-ph","authors_text":"Chao-Qiang Geng, Chong-Chung Lih","submitted_at":"2026-06-01T06:50:13Z","abstract_excerpt":"We investigate the exclusive semileptonic decays of $\\Lambda \\to p \\ell^{-} \\bar{\\nu}_{\\ell}~(\\ell=e,\\mu)$ within the Standard Model using the light-front quark model. The transition form factor behaviors of $\\Lambda \\to p$ are obtained from the effective treatment of nonvalence contributions in addition to the valence ones in the Drell-Yan-West frame due to the Bethe-Salpeter formalism. Based on these form factors, we obtain that the branching ratios of $\\Lambda\\to p e^{-} \\bar{\\nu}_{e}$ and $p \\mu^{-} \\bar{\\nu}_{\\mu}$, including nonvalence contributions, are around $8.32\\times 10^{-4}$ and $"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.01768","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/2606.01768/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"}