{"paper":{"title":"On the structure of the pi pi invariant mass spectra of the Upsilon(4S)-->Upsilon(1S,2S) pi^+ pi^- decays","license":"","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Feng-Kun Guo, Huan-Ching Chiang, Peng-Nian Shen, Rong-Gang Ping","submitted_at":"2006-01-16T05:24:44Z","abstract_excerpt":"We perform a model-independent analysis for recently reported data of the $\\pi^+\\pi^-$ invariant mass spectra in the $\\Upsilon(4S)\\to\\Upsilon(1S,2S)\\pi^+\\pi^-$ decays and point out that there does exist a broad peak below 0.6 GeV in the data of the $\\Upsilon(4S)\\to\\Upsilon(1S)\\pi^+\\pi^-$ decay, which is analogous to that in the $\\Upsilon(3S)\\to\\Upsilon(1S)\\pi^+\\pi^-$ decay. With the data of $\\Upsilon(4S)$ decays, we further test our model developed for studying the puzzle in the $\\Upsilon(3S)\\to\\Upsilon(1S)\\pi^+\\pi^-$ decay. The result shows that with such a model, all the $\\pi^+\\pi^-$ invaria"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0601120","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/hep-ph/0601120/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"}