{"paper":{"title":"Tetraquark interpretation of the BELLE data on the anomalous $\\Upsilon(1S) \\pi^+\\pi^-$ and $\\Upsilon(2S) \\pi^+\\pi^-$ production near the $\\Upsilon(5S)$ resonance","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Ahmed Ali, Christian Hambrock, M. Jamil Aslam","submitted_at":"2009-12-26T13:29:32Z","abstract_excerpt":"We analyze the Belle data [K. F. Chen {\\it et al.} (Belle Collaboration), Phys.\\ Rev.\\ Lett.\\  {\\bf 100}, 112001 (2008); I. Adachi {\\it et al.}  (Belle Collaboration), arXiv:0808.2445] on the processes $e^+ e^- \\to \\Upsilon(1S)\\; \\pi^+\\pi^-, \\Upsilon(2S)\\; \\pi^+\\pi^-$ near the peak of the $\\Upsilon(5S)$ resonance, which are found to be anomalously large in rates compared to similar dipion transitions between the lower $\\Upsilon$ resonances. Assuming these final states arise from the production and decays of the $J^{PC}=1^{--}$ state $Y_b(10890)$, which we interpret as a bound (diquark-antidiqu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.5016","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"}