{"paper":{"title":"Branching Ratio and Polarization of $B\\to\\rho(\\omega)\\rho(\\omega)$ Decays in Perturbative QCD Approach","license":"","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Cai-Dian Lu, Ying Li","submitted_at":"2005-08-02T13:39:59Z","abstract_excerpt":"In this work, we calculated the branching ratios, polarization fractions and CP asymmetry of decay modes $B\\to\\rho(\\omega)\\rho(\\omega)$ in the Perturbative QCD approach, which is based on $\\mathbf{k}_T$ factorization. After calculation, we find the the branching ratios of $B^0 \\to \\rho^+ \\rho^-$, $B^+ \\to \\rho^+ \\rho^0$ and $B^+ \\to \\rho^+ \\omega$ are at the order of $10^{-5}$, and their longitudinal polarization fractions are more than 90%. The above results agree with BarBar's measurements. We also predict the branching ratios and polarizations of $B^0 \\to \\rho^0 \\rho^0$, $B^0 \\to \\rho^0 \\om"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0508032","kind":"arxiv","version":4},"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"}