{"paper":{"title":"Phenomenological Evidence for the Gluon Content of $\\eta$ and $\\eta'$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"J.-M. Frere, M. Tytgat, Patricia Ball","submitted_at":"1995-08-23T20:54:43Z","abstract_excerpt":"We discuss the effect of $\\eta$--$\\eta'$ mixing and of axial current anomalies on various decay processes. We describe the 2$\\gamma$ decays of $\\eta$ and $\\eta'$, the radiative decays of low-lying vector mesons as well as the decays $\\eta\\to 3\\pi$, $J/\\psi\\to\\eta\\gamma$ and $J/\\psi\\to\\eta'\\gamma$ in one unified framework, in which they are related to the electromagnetic and strong axial current anomalies, respectively. We also discuss briefly the enhancement of $\\eta'$ in $D_s$ decays and suggest a possible relation to gluon-mediated processes. The importance of the decays of the glueball cand"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9508359","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/hep-ph/9508359/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"}