{"paper":{"title":"$B \\to K^* \\ell^+\\ell^-$ in soft-collinear effective theory","license":"","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"A. Ali, G. Kramer, Guohuai Zhu","submitted_at":"2006-01-05T11:59:55Z","abstract_excerpt":"We study the rare B decay $B \\to K^* \\ell^+ \\ell^-$ using soft-collinear effective theory (SCET). At leading power in $1/m_b$, a factorization formula is obtained valid to all orders in $\\alpha_s$. For phenomenological application, we calculate the decay amplitude including order $\\alpha_s$ corrections, and resum the logarithms by evolving the matching coefficients from the hard scale ${\\cal O}(m_b)$ down to the scale $\\sqrt{m_b \\Lambda_h}$. The branching ratio for $B \\to K^* \\ell^+ \\ell^-$ is uncertain due to the imprecise knowledge of the soft form factors $\\zeta_\\perp (q^2)$ and $\\zeta_\\par"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0601034","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ph/0601034/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"}