Rare decaysB0→D(*)+sD(*)−sandB0s→D(*)+D(*)−in perturbative QCD approach
نویسندگان
چکیده
منابع مشابه
Rare Radiative B Decays in Perturbative Qcd
We report on recent progress on perturbative QCD calculations of certain exclusive rare weak B meson decays involving hard photons. In the limit of a photon energy Eγ much larger than ΛQCD , the amplitudes for such processes can be analyzed in a twist expansion in powers of Λ/Eγ . The leading twist amplitude is given by the convolution of a hard scattering amplitude with the B meson light-cone ...
متن کاملV decays in the perturbative QCD approach
Two-body non-leptonic charmed decays B(s) → D(s)P , D (s)P , D(s)V and D (s)V are analyzed in perturbative QCD approach, where P and V denote the light pseudoscalar meson and vector meson, respectively. We test the D meson wave function by a χ fit with experimental data of six B → DP channels. We give the branching ratios of all the charmed B decay channels, most of which agree with experiments...
متن کاملPerturbative and non-perturbative QCD
In these lectures we give a concise introduction to the ideas of renormalon calculus in QED and QCD. We focus in particular on the example of the Adler D function of vacuum polarization, and on relations between perturbative renormalon ambiguities and corresponding non-perturbative Operator Product Expansion (OPE) ambiguities. Recent work on infrared freezing of Euclidean observables is also di...
متن کاملProgress in Perturbative Qcd
We briefly summarize some recent theoretical developments in perturbative QCD, emphasizing new ideas which have led to widening the domain of applicability of perturbation theory. In particular, it is now possible to calculate efficiently processes with many partons; the high order behavior of perturbation theory can be at least partly understood by going beyond leading twist accuracy; factoriz...
متن کاملDevelopments in Perturbative Qcd
A brief review of key recent developments and ongoing projects in perturbative QCD theory, with emphasis on conceptual advances that have the potential for impact on LHC studies. Topics covered include: twistors and new recursive calculational techniques; automation of one-loop predictions; developments concerning NNLO calculations; the status of Monte Carlo event generators and progress in mat...
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: Journal of Physics G: Nuclear and Particle Physics
سال: 2005
ISSN: 0954-3899,1361-6471
DOI: 10.1088/0954-3899/31/3/007