{"paper":{"title":"Amplitude Analyses of $D^0 \\to {\\pi^+\\pi^-\\pi^+\\pi^-}$ and $D^0 \\to {K^+K^-\\pi^+\\pi^-}$ Decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"Claire Prouve, Evelina Gersabeck, Jack Benton, Jeremy Dalseno, Jonas Rademacker, Nicola Skidmore, Paras Naik, Philippe d'Argent, Sam Harnew","submitted_at":"2017-03-24T16:56:53Z","abstract_excerpt":"The resonant substructure of $D^0 \\to \\pi^+\\pi^-\\pi^+\\pi^-$ decays is studied using data collected by the CLEO-c detector. An amplitude analysis is performed in order to disentangle the various intermediate state contributions. To limit the model complexity a data driven regularization procedure is applied. The prominent contributions are the decay modes $D^0\\to a_1(1260)^+\\pi^-$, $D^0\\to \\sigma f_0(1370)$ and $D^0 \\to \\rho(770)^0 \\rho(770)^0$. The broad resonances $a_1(1260)^+$, $\\pi(1300)^+$ and $a_1(1640)^+$ are studied in detail, including quasi-model-independent parametrizations of their "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.08505","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"}