{"paper":{"title":"Observation of Y(2175) in $J/\\psi\\to \\eta\\phi f_0(980)$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"BES Collaboration: M. Ablikim, et al","submitted_at":"2007-12-07T13:57:08Z","abstract_excerpt":"The decays of $J/\\psi\\to \\eta\\phi f_0(980) (\\eta\\to \\gamma\\gamma, \\phi \\to K^+K^-, f_0(980)\\to\\pi^+\\pi^-)$ are analyzed using a sample of $5.8 \\times 10^{7}$ $J/\\psi$ events collected with the BESII detector at the Beijing Electron-Positron Collider (BEPC). A structure at around $2.18 $GeV/$c^2$ with about $5\\sigma$ significance is observed in the $\\phi f_0(980)$ invariant mass spectrum. A fit with a Breit-Wigner function gives the peak mass and width of $m=2.186\\pm 0.010 (stat)\\pm 0.006 (syst) $GeV/$c^2$ and $\\Gamma=0.065\\pm 0.023 (stat)\\pm 0.017 (syst) $GeV/$c^2$, respectively, that are cons"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0712.1143","kind":"arxiv","version":5},"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/0712.1143/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"}