D+ → η(')l+νl semileptonic decays in light-cone sum rules

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LI Jing-Wu, XUE Dan-Qing, XU Qing-Qiang and WU Xiang-Yao. D+ → η(')l+νl semileptonic decays in light-cone sum rules[J]. Chinese Physics C, 2011, 35(6): 519-524. doi: 10.1088/1674-1137/35/6/001
LI Jing-Wu, XUE Dan-Qing, XU Qing-Qiang and WU Xiang-Yao. D+ → η(')l+νl semileptonic decays in light-cone sum rules[J]. Chinese Physics C, 2011, 35(6): 519-524.  doi: 10.1088/1674-1137/35/6/001 shu
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Received: 2010-09-10
Revised: 2010-11-19
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D+ → η(')l+νl semileptonic decays in light-cone sum rules

Abstract: 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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