| B → A transitions in the light-cone QCD sum rules with the chiral current |
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| 引用本文： | 孙艳军,王志刚,黄涛.B → A transitions in the light-cone QCD sum rules with the chiral current[J].中国物理 C,2012,36(11). |
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| 作者姓名： | 孙艳军 王志刚 黄涛 |
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| 作者单位： | 1. Institute of High Energy Physics and Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences, Beijing 100049, China;;2. Departments of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;;3. Department of Physics, North China Electric Power University, Baoding 071003, China |
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| 摘 要： | In this article, we calculate the form-factors of the transitions B → a1(1260), b1(1235) in the leading-order approximation using the light-cone QCD sum rules. In calculations, we choose the chiral current to interpolate the B-meson, which has the outstanding advantage that the twist-3 light-cone distribution amplitudes of the axial-vector mesons makes no contributions, and the resulting sum rules for the form-factors suffer from far fewer uncertainties. Then we study the semi-leptonic decays B → a1(1260) lvl, b1(1235) lvl (l=e,μ,τ), and make predictions for the differential decay widths and decay widths, which can be compared with the experimental data in the coming future.
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| 关 键 词： | B-meson decay axial-vector mesons light-cone QCD sum rules chiral current |
| 收稿时间： | 2012-2-15 |
| 修稿时间： | 2012-3-14 |
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