{"paper":{"title":"Further tests of lepton flavour universality from the charged lepton energy distribution in $b\\to c$ semileptonic decays: The case of $\\Lambda_b\\to \\Lambda_c \\ell \\bar\\nu_\\ell$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Eliecer Hern\\'andez, Juan Nieves, Neus Penalva","submitted_at":"2019-08-06T19:03:39Z","abstract_excerpt":"In a general framework, valid for any $H\\to H'\\ell^-\\bar\\nu_\\ell$ semileptonic decay, we analyze the $d^2\\Gamma/(d\\omega d\\cos\\theta_\\ell)$ and $d^2\\Gamma/ (d\\omega dE_\\ell)$ distributions, with $\\omega$ being the product of the hadron four-velocities, $\\theta_\\ell$ the angle made by the three-momenta of the charged lepton and the final hadron in the $W^-$ center of mass frame and $E_\\ell$ the charged lepton energy in the decaying hadron rest frame. Within the Standard Model (SM), $ d^2\\Gamma/(d\\omega dE_\\ell)\\propto \\left(c_0(\\omega)+c_1(\\omega)E_\\ell/M+c_2(\\omega)E^2_\\ell/M^2\\right)$, with $"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02328","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.02328/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"}