{"paper":{"title":"Y(4260) --> gamma + X(3872) in the diquarkonium picture","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A.D. Polosa, H.-X. Chen, L. Maiani, V. Riquer","submitted_at":"2015-10-13T11:21:14Z","abstract_excerpt":"The observed Y(4260)\\to \\gamma + X(3872) decay is a natural consequence of the diquark-antidiquark description of Y and X resonances. In this note we attempt an estimate of the transition rate, \\Gamma_{\\rm rad}, by a non-relativistic calculation of the electric dipole term of a diquarkonium bound state. We compute \\Gamma_{\\rm rad} for generic composition values of the isospin of X and Y. Specializing to I=0 for X(3872), we find \\Gamma_{\\rm rad}= 496~keV for Y(4260) with I=0 and \\Gamma_{\\rm rad}= 179~keV for I=1. Combining with BESIII data, we derive upper bounds to B(Y\\to J/\\Psi+\\pi+\\pi) and t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.03626","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"}