TY - JOUR

T1 - Perturbative QCD study of the B→K* γ decay

AU - Li, Hsiang Nan

AU - Lin, Guey-Lin

PY - 1999/9/1

Y1 - 1999/9/1

N2 - We apply the perturbative QCD factorization theorem developed recently for nonleptonic heavy meson decays to the radiative decay B→K* γ. In this formalism the evolution of the Wilson coefficients from the W boson mass down to the characteristic scale of the decay process is governed by the effective weak Hamiltonian. The evolution from the characteristic scale to a lower hadronic scale is formulated by the Sudakov resummation. In addition to computing the dominant contribution arising from the magnetic-penguin operator O7, we also calculate the contributions of four-quark operators. By fitting our prediction for the branching ratio of the B→K* γ decay to the CLEO data, we determine the B meson wave function that possesses a sharp peak at a low momentum fraction.

AB - We apply the perturbative QCD factorization theorem developed recently for nonleptonic heavy meson decays to the radiative decay B→K* γ. In this formalism the evolution of the Wilson coefficients from the W boson mass down to the characteristic scale of the decay process is governed by the effective weak Hamiltonian. The evolution from the characteristic scale to a lower hadronic scale is formulated by the Sudakov resummation. In addition to computing the dominant contribution arising from the magnetic-penguin operator O7, we also calculate the contributions of four-quark operators. By fitting our prediction for the branching ratio of the B→K* γ decay to the CLEO data, we determine the B meson wave function that possesses a sharp peak at a low momentum fraction.

UR - http://www.scopus.com/inward/record.url?scp=0003148645&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.60.054001

DO - 10.1103/PhysRevD.60.054001

M3 - Article

AN - SCOPUS:0003148645

VL - 60

SP - 1

EP - 10

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 5

ER -