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arXiv · hep-ph/0006022

$B\to ππ, K π$ Decays in QCD Improved Factorization Approach

Taizo Muta·Akio Sugamoto·Mao-Zhi Yang·Ya-Dong Yang
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Abstract

Motivated by recent measurements, we investigate $B\to ππ, K π$ 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\to K^0 π^0 $. We also discuss in detail the strong penguin contributions and the ${\cal O}(α_s)$ corrections to the chirally enhanced terms. We find that the weak phase $γ$ lies in the region $120^{\circ}<γ<240^{\circ}$, which is mainly constrained by $B\to π^- π^+ $.

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Taizo Muta, Akio Sugamoto, Mao-Zhi Yang, Ya-Dong Yang. 2000-08-23. $B\to ππ, K π$ Decays in QCD Improved Factorization Approach. https://doi.org/10.1103/physrevd.62.094020

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