QCD aspects of exclusive B meson decays
نویسندگان
چکیده
منابع مشابه
Perturbative QCD analysis of exclusive B meson decays
We review the perturbative QCD formalism for exclusive heavy meson decays, concentrating on the three-scale factorization theorem for nonleptonic processes. The formalism is then extended to the radiative decay B → Kγ, which occurs through penguin diagrams. It is observed that the contributions from the operators other than the penguin one b → sγ are not negligible. From the best fit to the exp...
متن کاملExclusive non-leptonic B meson decays from QCD
Exclusive non-leptonic decays play a crucial part in the on-going programme to clarify the sources of CP violation and rare flavour-changing phenomena. As regards CP violation this is illustrated by the fact that there exists a fair knowledge of the length of each of the sides of the unitarity triangle from semi-leptonic B decays and BB̄ mixing. Since recently, the angle β (more precisely, sin 2...
متن کاملExclusive Semileptonic and Rare B Meson Decays in QCD
We present first complete results for the semileptonic and rare radiative form factors of B mesons weak decay into a light vector meson (ρ, ω,K, φ) in the light-cone sum rule approach. The calculation includes radiative corrections, higher twist corrections and SU(3) breaking effects. The theoretical uncertainty is investigated in detail. A simple parametrization of the form factors is given in...
متن کاملExclusive Radiative B Meson Decays
We have investigated exclusive, radiative B meson decays to charmless mesons (ρ, ω, φ, K(892), K 2 (1430)) in 9.7× 106 BB̄ decays accumulated with the CLEO detector. The B → K(892)γ branching fractions are determined to be B(B0 → K∗0(892)γ) = (4.55 +0.72 −0.68 ± 0.34)×10−5 and B(B+ → K∗+(892)γ) = (3.76 +0.89 −0.83 ± 0.28)×10−5. We have searched for CP asymmetry in B → K(892)γ decays and measure ...
متن کاملPQCD analysis of exclusive B meson decays
Recently, perturbative QCD (PQCD) has been proposed to be an alternative approach to the study of heavy hadron decays [1{3], which complements the heavy quark e ective theory (HQET) [4] for inclusive processes and the Bauer-Stech-Wirbel (BSW) method [5] for exclusive processes. The basic idea is the factorization theorem, which states that nonperturbative dynamics involved in a physical quantit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Progress in Particle and Nuclear Physics
سال: 2003
ISSN: 0146-6410
DOI: 10.1016/s0146-6410(03)90013-5