{"paper":{"title":"The $\\eta^\\prime g^* g^{(*)}$ Vertex Including the $\\eta^\\prime$-Meson Mass","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Ali (CERN), A.Ya. Parkhomenko (Univ. Bern)","submitted_at":"2003-07-07T16:19:38Z","abstract_excerpt":"The $\\eta^\\prime g^* g^{(*)}$ effective vertex function is calculated in the QCD hard-scattering approach, taking into account the $\\eta^\\prime$-meson mass. We work in the approximation in which only one non-leading Gegenbauer moment for both the quark-antiquark and the gluonic light-cone distribution amplitudes for the $\\eta^\\prime$-meson is kept. The vertex function with one off-shell gluon is shown to have the form (valid for $| q_1^2 | > m_{\\eta^\\prime}^2$) $F_{\\eta^\\prime g^* g} (q_1^2, 0, m_{\\eta^\\prime}^2) = m_{\\eta^\\prime}^2 H(q_1^2)/(q_1^2 - m_{\\eta^\\prime}^2)$, where $H(q_1^2)$ is a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0307092","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":""},"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"}