{"paper":{"title":"Form factors for $\\mathrm B_\\mathrm s \\to \\mathrm K \\ell \\nu$ decays in Lattice QCD","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"hep-lat","authors_text":"Alberto Ramos, Anosh Joseph, Fabio Bernardoni, Felix Bahr, Hubert Simma, John Bulava, Rainer Sommer","submitted_at":"2014-11-14T14:21:18Z","abstract_excerpt":"We present the current status of the computation of the form factor $f_+ (q^2)$ for the semi-leptonic decay $\\mathrm B_\\mathrm s \\to \\mathrm K \\ell \\nu$ by the ALPHA collaboration. We use gauge configurations which were generated as part of the Coordinated Lattice Simulations (CLS) effort. They have $N_\\mathrm f=2$ non-perturbatively $O(a)$ improved Wilson fermions, and pion masses down to $\\approx 250 \\,\\mathrm {MeV}$ with $m_\\pi L \\geq 4$. The heavy quark is treated in non-perturbative Heavy Quark Effective Theory (HQET).\n  We discuss how to extract the form factors from the correlation func"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.3916","kind":"arxiv","version":1},"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"}