TY - JOUR
T1 - Perturbative QCD analysis of [Formula Presented] decays and power counting
AU - Chen, Chuan Hung
PY - 2001
Y1 - 2001
N2 - We investigate the exclusive nonleptonic B meson decays (Formula presented) in the perturbative QCD formalism. It is shown that the end-point (logarithmic and linear) singularities in the decay amplitudes do not exist, after (Formula presented) 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 (Formula presented) are larger than those (Formula presented) 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.
AB - We investigate the exclusive nonleptonic B meson decays (Formula presented) in the perturbative QCD formalism. It is shown that the end-point (logarithmic and linear) singularities in the decay amplitudes do not exist, after (Formula presented) 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 (Formula presented) are larger than those (Formula presented) 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.
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U2 - 10.1103/PhysRevD.64.112002
DO - 10.1103/PhysRevD.64.112002
M3 - Article
AN - SCOPUS:85038274223
VL - 64
SP - 17
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 11
ER -