Revisiting the Kπ puzzle in the pQCD factorization approach |
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引用本文: | 白玮,刘敏,樊莹莹,王文飞,程山,肖振军.Revisiting the Kπ puzzle in the pQCD factorization approach[J].中国物理 C,2014,38(3):3-8. |
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作者姓名: | 白玮 刘敏 樊莹莹 王文飞 程山 肖振军 |
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作者单位: | Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210023, China |
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基金项目: | Supported by National Natural Science Foundation of China(10975074,11235005) |
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摘 要: | In this paper,we calculated the branching ratios and direct CP violation of the four B→Kπ 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~15%enhancement to the branching ratios,and lead to a very good agreement with the data;(b) The NLO pQCD predictions are A_(CP)~(dir)(B~0→K~+π~0)=(-6.5±3.1)%and A_(CP)~(dir)(B~+→K~+π~0)=(2.2±2.0)%,become well consistent with the data due to the inclusion of the NLO contributions.
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关 键 词: | the pQCD factorization approach B meson decays branching ratio CP violation |
收稿时间: | 2013-5-3 |
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