{"paper":{"title":"$B^{(*)}\\bar B^{(*)}$ intermediate state contribution to $\\Upsilon(4S,5S)\\to \\eta_b+\\gamma$ radiative decay","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Hong-Wei Ke, Xiang Liu, Xue-Qian Li","submitted_at":"2010-06-08T01:41:28Z","abstract_excerpt":"In this work, we investigate the re-scattering effects in the radiative decay $\\Upsilon(5S)\\to\\eta_b+\\gamma$, which were suggested to be crucially important for understanding the anomalous largeness of the branching ratios $B(\\Upsilon(5S)\\to \\Upsilon(1S)+\\pi\\pi)$ and $B(\\Upsilon(5S)\\to \\Upsilon(1S)+\\eta)$. Our calculations show that the re-scattering effects may enhance $\\Gamma(\\Upsilon(10860)\\to \\eta_b+\\gamma)$ by four orders, but the tetraquark structure does not. Recently the BaBar and CLEO collaborations have measured the mass of ${\\eta_b}$ and the branching ratios $\\mathcal{B}(\\Upsilon(2S"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.1437","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"}