{"paper":{"title":"Precise determination of the pole position of the exotic $Z_c(3900)$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Feng-Kun Guo, Meng-Lin Du, Yun-Hua Chen","submitted_at":"2023-10-24T16:05:52Z","abstract_excerpt":"We perform a unified description of the experimental data of the $\\pi^+\\pi^-$ and $J/\\psi\\pi^\\pm$ invariant mass spectra for $e^+e^- \\rightarrow J/\\psi \\pi^+\\pi^-$ and the $D^0 D^{\\ast-}$ mass spectrum for $e^+e^- \\rightarrow D^0 D^{\\ast-} \\pi^+$ at $e^+e^-$ center-of-mass energies 4.23 and 4.26 GeV. The analysis takes into account open-charm meson loops that contain triangle singularities, the $J/\\psi\\pi$-$D\\bar D^*$ coupled-channel interaction respecting unitarity, and the strong $\\pi\\pi$-$K\\bar K$ final state interaction using dispersion relations. The analysis leads to a precise determinat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.15965","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2310.15965/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"}