{"paper":{"title":"Study of the rare hyperon decay Omega \\to Xi \\pi^+ \\pi^-","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"hep-ex","authors_text":"A. Chakravorty, C. Durandet, C. G. White, C. James, C. M. Jenkins, D. M. Kaplan, D. Rajaram, E. C. Dukes, G. Gidal, H. A. Rubin, H. K. Park, H. R. Gustafson, HyperCP Collaboration: O. Kamaev, J. Felix, J.-P. Perroud, J. Volk, K.-B. Luk, K. Clark, K. S. Nelson, L. C. Lu, M. Huang, M. J. Longo, N. Solomey, P. Zyla, R. A. Burnstein, S. L. White, T. D. Jones, T. Holmstrom, W. Luebke, W.-S. Choong, Y. C. Chen, Y. Fu","submitted_at":"2010-08-25T22:55:56Z","abstract_excerpt":"We report a new measurement of the decay \\Omega^- \\to \\Xi^- \\pi^+ \\pi^- with 76 events and a first observation of the decay \\Omega^+ \\to \\Xi^+ \\pi^+ \\pi^- with 24 events, yielding a combined branching ratio (3.74 ^{+0.67}_{-0.56}) \\times 10^{-4}. This represents a factor 25 increase in statistics over the best previous measurement. No evidence is seen for CP violation, with B(\\Omega^- \\to \\Xi^- \\pi^+ \\pi^-)=4.04^{+0.83}_{-0.71} \\times 10^{-4} and B(\\Omega^+ \\to \\Xi^+ \\pi^+ \\pi^-)=3.15^{+1.12}_{-0.89} \\times 10^{-4}. Contrary to theoretical expectation, we see little evidence for the decays \\Om"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.4405","kind":"arxiv","version":1},"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"}