Radiative corrections to radiative B decays: Exclusive B → Vγ at NLO

✍ Scribed by G. Buchalla

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 364 KB
• Volume: 116
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(03)80181-0

✦ Synopsis

We discuss a model-independent framework for the analysis of the radiative B-meson decays B ~ K% and B --* tW based on the heavy-quark limit of QCD. We present a factorization formula for the treatment of B --* V~/ matrix elements involving charm (or up-quark) loops, which contribute at leading power in AQCD/mB to the decay amplitude. Annihilation topologies are power suppressed, but still calculable in some cases. The framework of QCD factorization is necessary to compute exclusive b --* s(d)'~ decays systematically beyond the leading logarithmic approximation. Results to next-to-leading order in QCD and to leading order in the heavy-quark limit are given and phenomenological implications are discussed.