Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-04-18
Phys.Rev.D63:054008,2001
Physics
High Energy Physics
High Energy Physics - Phenomenology
Latex, 57 pages including 3 tables and 13 figures
Scientific paper
10.1103/PhysRevD.63.054008
We compute branching ratios of $B\to K\pi$ decays in the framework of perturbative QCD factorization theorem. Decay amplitudes are classified into the topologies of tree, penguin and annihilation, all of which contain both factorizable and nonfactorizable contributions. These contributions are expressed as the convolutions of hard $b$ quark decay amplitudes with universal meson wave functions. It is shown that (1) matrix elements of penguin operators are dynamically enhanced compared to those employed in the factorization assumption; (2) annihilation diagrams are not negligible, contrary to common belief; (3) annihilation diagrams contribute large strong phases; (4) the uncertainty of current data of the ratio $R={\cal B}(B_d^0\to K^\pm\pi^\mp)/{\cal B}(B^\pm\to K^0\pi^\pm)$ and of CP asymmetries is too large to give a constraint of $\phi_3$. Assuming $\phi_3=90^o$ which is extracted from the best fit to the data of $R$, predictions for the branching ratios of the four $B\to K\pi$ modes are consistent with data.
Keum Yong-Yeon
Li Hsiang-nan
Sanda A. I.
No associations
LandOfFree
Penguin Enhancement and $B\to Kπ$ decays in perturbative QCD does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Penguin Enhancement and $B\to Kπ$ decays in perturbative QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Penguin Enhancement and $B\to Kπ$ decays in perturbative QCD will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-6897