D+ → η(')l+νl semileptonic decays in light-cone sum rules |
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作者姓名: | 李竞武 薛丹青 徐庆强 吴向尧 |
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作者单位: | 1. Department of Physics, Xuzhou Normal University, Xuzhou 221116, China;;2. Institute of Physics, Jilin Normal University, Siping 136000, China |
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摘 要: | We calculate the D → η transition form factor in light-cone sum rules by taking improved current correlators to avoid the pollution from the twist-3 wave function. We get consistent results of the D+ → η(')l+νl decays with the experimental data. By comparing the difference between the results of the branching ratios of D+ → η(')l+νl from a two-pole parameterization model and from a BZ parameterization model, we find that the two-pole model and the BZ model are comparably believable. One way is supposed for the determination of the η-η' mixing angle from the dependence of the branching ratios of D+ → η(')l+νl decays on the η-η' mixing angle.
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关 键 词: | form factor chiral current correlator light-cone sum rules η-η |
收稿时间: | 2010-09-10 |
修稿时间: | 2010-11-19 |
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