{"paper":{"title":"QCD factorization of the four-lepton decay $B^-\\rightarrow \\ell \\bar{\\nu}_\\ell \\ell^{(\\prime)} \\bar{\\ell}^{(\\prime)}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Kimberley Keri Vos, Martin Beneke, Panagiotis Rigatos, Philipp B\\\"oer","submitted_at":"2021-02-19T17:42:05Z","abstract_excerpt":"Motivated by the first search for the rare charged-current $B$ decay to four leptons, $\\ell \\bar{\\nu}_\\ell \\ell^{(\\prime)} \\bar{\\ell}^{(\\prime)}$, we calculate the decay amplitude with factorization methods. We obtain the $B\\to \\gamma^*$ form factors, which depend on the invariant masses of the two lepton pairs, at leading power in an expansion in $\\Lambda_{\\rm QCD}/m_b$ to next-to-leading order in $\\alpha_s$, and at $\\mathcal{O}(\\alpha_s^0)$ at next-to-leading power. Our calculations predict branching fractions of a few times $10^{-8}$ in the $\\ell^{(\\prime)} \\bar{\\ell}^{(\\prime)}$ mass-squar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.10060","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/2102.10060/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"}