{"paper":{"title":"The $\\eta^\\prime$ transition form factor from space- and time-like experimental data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Pablo Sanchez-Puertas, Pere Masjuan, Rafel Escribano, Sergi Gonzalez-Solis","submitted_at":"2015-12-23T15:43:37Z","abstract_excerpt":"The $\\eta^\\prime$ transition form factor is reanalyzed in view of the recent BESIII first observation of the Dalitz decay $\\eta^\\prime\\to\\gamma e^+e^-$ in both space- and time-like regions at low and intermediate energies using the Pad\\'e approximants method. The present analysis provides a suitable parameterization for reproducing the measured form factor in the whole energy region and allows to extract the corresponding low-energy parameters together with a prediction of its values at the origin, related to $\\Gamma_{\\eta^\\prime\\to\\gamma\\gamma}$, and the asymptotic limit. The $\\eta$-$\\eta^\\pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.07520","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":""},"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"}