{"paper":{"title":"Observation of the $Y(4140)$ structure in the $J/\\psi\\,\\phi$ Mass Spectrum in $B^\\pm\\to J/\\psi\\,\\phi K$ cays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"the CDF Collaboration","submitted_at":"2011-01-31T19:46:14Z","abstract_excerpt":"The observation of the $Y(4140)$ structure in $B^\\pm\\rightarrow J/\\psi\\,\\phi K^\\pm$ decays produced in $\\bar{p} p $ collisions at $\\sqrt{s}=1.96~\\TeV$ is reported with a statistical significance greater than 5 standard deviations. A fit to the $J/\\psi\\,\\phi$ mass spectrum is performed assuming the presence of a Breit-Wigner resonance. The fit yields a signal of $19^{+6}_{-5}$ resonance events, and resonance mass and width of\n  $4143.4^{+2.9}_{-3.0}(\\mathrm{stat})\\pm0.6(\\mathrm{syst})~\\MeVcc$ and $15.3^{+10.4}_{-6.1}(\\mathrm{stat})\\pm2.5(\\mathrm{syst})~\\MeVcc$ respectively. The parameters of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.6058","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"}