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Flavor-singlet B-decay amplitudes in QCD factorization

2003; Elsevier BV; Volume: 651; Issue: 1-2 Linguagem: Inglês

10.1016/s0550-3213(02)01091-x

1873-1562

Martin Beneke, Matthias Neubert,

Medical Imaging Techniques and Applications

Exclusive hadronic B-meson decays into two-body final states consisting of a light pseudoscalar or vector meson along with an η or η′ meson are of great phenomenological interest. Their theoretical analysis involves decay mechanisms that are unique to flavor-singlet states, such as their coupling to gluons or their "intrinsic charm" content. These issues are studied systematically in the context of QCD factorization and the heavy-quark expansion. Theory can account for the experimental data on the B→K(∗)η(′) branching fractions, albeit within large uncertainties.