Applicability of perturbative QCD to B ---> D decays

Li, Hsiang-nan

doi:10.1103/PhysRevD.52.3958

Applicability of perturbative QCD to B ---> D decays

Hsiang-nan Li
(
- Taiwan, Natl. Cheng Kung U.
)

Dec, 1994

17 pages

Published in:

Phys.Rev.D 52 (1995) 3958-3965

e-Print:

hep-ph/9412340 [hep-ph]

DOI:

10.1103/PhysRevD.52.3958

Report number:

CCUTH-94-06

View in:

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Abstract:

We examine the applicability of perturbative QCD to

B

meson decays into

D

mesons. We find that the perturbative QCD formalism, which includes Sudakov effects at intermediate energy scales, is applicable to the semi-leptonic decay

B\to D l\nu

, when the

D

meson recoils fast. Following this conclusion, we analyze the two-body non-leptonic decays

B\to D\pi

and

B\to DD_s

. By comparing our predictions with experimental data, we extract the matrix element

|V_{cb}|=0.044

.

B: semileptonic decay
semileptonic decay: B
B: hadronic decay
hadronic decay: B
quantum chromodynamics: perturbation theory
effect: Sudakov
CKM matrix matrix
form factor: factorization
factorization: form factor
radiative correction

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