{"paper":{"title":"Can the nature of $a_0(980)$ be tested in the $D_s^{+}\\to \\pi^{+}\\pi^0 \\eta$ decay?","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":["hep-ex","nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Ju-Jun Xie, Jun-Xu Lu, Li-Sheng Geng, Ming-Zhu Liu, Xi-Zhe Ling","submitted_at":"2021-02-10T09:37:56Z","abstract_excerpt":"From the amplitude analysis of the $D^+_s \\to \\pi^+ \\pi^0 \\eta$ decay, the BESIII Collaboration firstly observed the $D^+_s \\to a_0(980)^+\\pi^0$ and $D^+_s \\to a_0(980)^0\\pi^+$ decay modes, which are expected to occur through the pure $W$-annihilation processes. The measured branching fraction $\\mathcal{B}[D_{s}^{+}\\to a_{0}(980)^{+(0)}\\pi^{0(+)},a_{0}(980)^{+(0)}\\to \\pi^{+(0)}\\eta]$ is, however, found to be larger than those of known $W$-annihilation decays by one order of magnitude. This apparent contradiction can be reconciled if the two decays are induced by internal $W$-conversion or exte"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.05349","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2102.05349/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"}