{"paper":{"title":"Experimental evidence for a light and broad scalar resonance in $D^+\\to \\pi^-\\pi^+\\pi^+$ decay","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"E791 collaboration","submitted_at":"2000-07-14T18:09:43Z","abstract_excerpt":"From a sample of $1172 \\pm 61$ $D^+ \\to \\pi^- \\pi^+ \\pi^+$ decay, we find $\\Gamma (D^+ \\to \\pi^- \\pi^+ \\pi^+) / \\Gamma (D^+ \\to K^- \\pi^+ \\pi^+) =\n  0.0311 \\pm 0.0018 ^{+0.0016}_{-0.0026}$. Using a coherent amplitude analysis to fit the Dalitz plot of this decays, we find strong evidence that a scalar resonance of mass $478^{+24}_{-23} \\pm 17$ MeV/$c^2$ and width $324^{+42}_{-40} \\pm 21$ MeV/$c^2$ accounts for approximately half of all decays."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0007028","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":""},"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"}