%0 Journal Article
%T Revisiting $K¦Ð$ puzzle in the pQCD factorization approach
%A Wei Bai
%A Min Liu
%A Ying-Ying Fan
%A Wen-Fei Wang
%A Shan Cheng
%A Zhen-Jun Xiao
%J Physics
%D 2013
%I arXiv
%R 10.1088/1674-1137/38/3/033101
%X In this paper, we calculated the branching ratios and direct CP violation of the four $B\to K\pi$ decays with the inclusion of all currently known next-to-leading order (NLO) contributions by employing the perturbative QCD (pQCD) factorization approach. We found that (a) Besides the 10% enhancement from the NLO vertex corrections, the quark-loops and magnetic penguins, the NLO contributions to the form factors can provide an additional $\sim 15%$ enhancement to the branching ratios, and lead to a very good agreement with the data; (b) The NLO pQCD predictions are $\acp^{dir}(B^0\to K^+\pi^-)=(-6.5\pm 3.1)%$ and $\acp^{dir}(B^+\to K^+ \pi^0)=(2.2\pm 2.0)%$, become well consistent with the data due to the inclusion of the NLO contributions.
%U http://arxiv.org/abs/1305.6103v2