Perturbative QCD analysis of B→φK decays and power counting

Chuan Hung Chen, Yong Yeon Keum, Hsiang Nan Li

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104 Citations (Scopus)


We investigate the exclusive nonleptonic B meson decays B→φK in the perturbative QCD formalism. It is shown that the end-point (logarithmic and linear) singularities in the decay amplitudes do not exist, after kT and threshold resummations are included. Power counting for emission and annihilation topologies of diagrams, including both factorizable and nonfactorizable ones, is discussed with Sudakov effects taken into account. Our predictions for the branching ratios B(B→φK)∼10×10-6 are larger than those (≤4×10-6) from the factorization approach because of dynamical enhancement of penguin contributions. Whether this enhancement is essential for penguin-dominated modes can be justified by experimental data.

Original languageEnglish
Article number112002
JournalPhysical Review D
Issue number11
Publication statusPublished - 2001 Dec 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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