Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-07-31
Nucl.Phys.Proc.Suppl.163:139-144,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, Invited talk at the First Workshop on Theory, Phenomenology and Experiments in Heavy Flavour Physics, Anacapri, Italy
Scientific paper
10.1016/j.nuclphysbps.2006.09.01
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 $f_B$ and $B\to \pi$ form factor. Employing the LCSR technique, the $B\to \pi\pi$ 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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