{"paper":{"title":"Nonresonant explanation for the Y(4260) structure observed in the $e^+e^-\\to J/\\psi\\pi^+\\pi^-$ process","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Dian-Yong Chen, Jun He, Xiang Liu","submitted_at":"2010-12-24T08:29:54Z","abstract_excerpt":"In this work, we proposed a nonresonant explanation for the Y(4260) structure observed in the $e^+e^-\\to J/\\psi\\pi^+\\pi^-$ process, i.e., Y(4260) is not a genuine resonance. Our result indicates that the Y(4260) structure can be reproduced by the interference of production amplitudes of the $e^+e^-\\to J/\\psi\\pi^+\\pi^-$ processes via direct $e^+e^-$ annihilation and through intermediate charmonia $\\psi(4160)/\\psi(4415)$. Besides describing Y(4260) line shape in $e^+e^-\\to J/\\psi\\pi^+\\pi^-$ well, such a nonresonant explanation for the Y(4260) structure naturally answers why there is no evidence "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.5362","kind":"arxiv","version":4},"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"}