Exclusive Charmless B Decays in QCD
Alexander Khodjamirian
Abstract
The problem of hadronic input in charmless nonleptonic B decays is discussed. QCD sum rules and their light-cone versions (LCSR) provide an important part of this input, such as the decay constant fB and B π form factor. Employing the LCSR technique, the B ππ hadronic matrix elements with emission, penguin and annihilation topologies are calculated, with no evidence for large nonfactorizable effects and/or strong phases.
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