{"paper":{"title":"Long-distance weak annihilation contribution to the $B^{\\pm}\\to (\\pi^{\\pm},K^{\\pm}) \\ell^+\\ell^-$ decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"A. Guevara, G. L\\'opez Castro, P. Roig, S. L. Tostado","submitted_at":"2015-03-24T01:47:06Z","abstract_excerpt":"We propose an alternative evaluation of the long-distance weak annihilation (WA, also called one-photon exchange in this paper) contribution to the rare semileptonic $B^{\\pm}\\to (\\pi^{\\pm},K^{\\pm})\\ell^+\\ell^-$ ($\\ell=e,\\,\\mu$) decays. This hadronic description at low energies is matched at intermediate energies to its short-distance counterpart in terms of quark and gluon degrees of freedom.\n  Although the WA contribution does not contribute to solve the possible breaking of lepton-universality observed by LHCb in the $B^{\\pm}\\to K^{\\pm}(\\mu^+\\mu^-/e^+e^-)$ ratio, nor provides an important ha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.06890","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":""},"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"}