{"paper":{"title":"Direct CP violation in $\\bar{B}^0 \\to \\rho^0(\\omega)\\rho^0(\\omega) \\to \\pi^+\\pi^-\\pi^+\\pi^-$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"X.-H. Guo, Z.-H. Zhang","submitted_at":"2007-04-24T07:42:57Z","abstract_excerpt":"We study the direct CP violation in $\\bar{B}^0 \\to \\rho^0(\\omega)\\rho^0(\\omega) \\to \\pi^+\\pi^-\\pi^+\\pi^-$ (with unpolarized $\\rho^0(\\omega)$) via the $\\rho-\\omega$ mixing mechanism which causes a large strong phase difference and consequently a large CP violating asymmetry when the masses of the $\\pi^+\\pi^-$ pairs are in the vicinity of the $\\omega$ resonance. Since there are two $\\rho (\\omega)$ mesons in the intermediate state $\\rho-\\omega$ mixing contributes twice to the first order of isospin violation, leading to an even larger CP violating asymmetry (could be 30% -- 50% larger) than in th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.3132","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"}