{"paper":{"title":"Tree-Penguin Interference and Tests for $\\cos\\gamma < 0$ in Rare $B\\to PP$, $PV$ and $VV$ Decays","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Kwei-Chou Yang, Wei-Shu Hou","submitted_at":"1999-08-02T16:59:59Z","abstract_excerpt":"Recent rare $B \\to PP$, $PV$ decay data suggest that factorization holds well if, contrary to current fits, one has $\\cos\\gamma < 0$ where $\\gamma \\equiv {\\rm arg}(V_{ub}^*)$. We update previous results with light cone sum rule form factors, which seem to work better. We then discuss various $B\\to VV$ modes as well as the $K^{*} \\eta$ modes. Finding the pattern of $\\rho^+\\omega^0 < \\rho^+\\rho^0$, $K^{*+}\\rho^{-,0} > K^{*0}\\rho^+$, $K^{*+}\\omega^0 > K^{*0}\\omega^0$ and $K^{*+}\\eta > K^{*0}\\eta$ would strengthen the support for $\\cos\\gamma < 0$. The electroweak penguin enhances (suppresses) the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9908202","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ph/9908202/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}