{"paper":{"title":"Observation of a new excited beauty strange baryon decaying to $\\Xi^-_\\mathrm{b} \\pi^+ \\pi^-$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"CMS Collaboration","submitted_at":"2021-02-08T20:42:30Z","abstract_excerpt":"The $\\Xi^-_\\mathrm{b} \\pi^+ \\pi^-$ invariant mass spectrum is investigated with an event sample of proton-proton collisions at $\\sqrt{s} = $ 13 TeV, collected by the CMS experiment at the LHC in 2016-2018 and corresponding to an integrated luminosity of 140 fb$^{-1}$. The ground state $\\Xi^-_\\mathrm{b}$ is reconstructed via its decays to J$/\\psi$ $\\Xi^-$ and J$/\\psi$ $\\Xi^-$ $\\Lambda$ K$^-$. A narrow resonance, labeled $\\Xi_\\mathrm{b}$(6100)$^-$, is observed at a $\\Xi^-_\\mathrm{b} \\pi^+ \\pi^-$ invariant mass of 6100.3 $\\pm$ 0.2 (stat) $\\pm$ 0.1 (syst) $\\pm$ 0.6 ($\\Xi^-_\\mathrm{b}$) MeV, where "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.04524","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/2102.04524/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"}