{"paper":{"title":"Sterile neutrinos in leptonic and semileptonic decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Abada, A.M. Teixeira, A. Vicente, C. Weiland","submitted_at":"2013-11-12T16:23:39Z","abstract_excerpt":"We address the impact of a modified $W \\ell \\nu$ coupling on a wide range of observables, such as $\\tau$ leptonic and mesonic decays, leptonic decays of pseudoscalar mesons, as well as semileptonic meson decays. In particular, we concentrate on deviations from lepton flavour universality, focusing on the ratios $R_{P} = \\Gamma (P \\to \\ell \\nu) / \\Gamma (P \\to \\ell' \\nu)$, with $P=K, \\pi, D, D_s$, $R(D)={\\Gamma (B^+ \\to D \\tau^+ \\nu)}/{\\Gamma (B^+ \\to D\\ell^+ \\nu)}$, $R \\tau={\\Gamma (\\tau\\to \\mu\\nu\\nu)}/{\\Gamma (\\tau\\to e\\nu\\nu)}$, $R^{\\ell \\tau}_P=\\Gamma(\\tau\\to P\\nu)/\\Gamma(P\\to \\ell \\nu)$, a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.2830","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":""},"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"}