{"paper":{"title":"$\\Lambda_b \\to \\Lambda^*(1520)\\ell^+\\ell^-$ form factors from lattice QCD","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-ph"],"primary_cat":"hep-lat","authors_text":"Gumaro Rendon, Stefan Meinel","submitted_at":"2020-09-19T22:45:27Z","abstract_excerpt":"We present the first lattice QCD determination of the $\\Lambda_b \\to \\Lambda^*(1520)$ vector, axial vector, and tensor form factors that are relevant for the rare decays $\\Lambda_b \\to \\Lambda^*(1520)\\ell^+\\ell^-$. The lattice calculation is performed in the $\\Lambda^*(1520)$ rest frame with nonzero $\\Lambda_b$ momenta, and is limited to the high-$q^2$ region. An interpolating field with covariant derivatives is used to obtain good overlap with the $\\Lambda^*(1520)$. The analysis treats the $\\Lambda^*(1520)$ as a stable particle, which is expected to be a reasonable approximation for this narr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.09313","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2009.09313/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"}