B→ππ,Kπ decays in the QCD improved factorization approach
PR_D62_e094020.pdf 131 KB
Motivated by recent measurements, we investigate B→ππ,Kπ decay modes in the framework of QCD improved factorization, which was recently proposed by Beneke et al. We find that all the measured branching ratios are well accommodated in the reasonable parameter space except for B→K0π0. We also discuss in detail the strong penguin contributions and the O(αs) corrections to the chirally enhanced terms. We find that the weak phase γ lies in the region 120°<γ<240°, which is mainly constrained by B→π-π+.
Physical review D
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American Physical Society
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Graduate School of Science