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

LI Jing-Wu; XUE Dan-Qing; XU Qing-Qiang; WU Xiang-Yao

doi:10.1088/1674-1137/35/6/001

Chinese Physics C> 2011, Vol. 35> Issue(6) : 519-524 DOI: 10.1088/1674-1137/35/6/001

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

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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⁺ν_l decays with the experimental data. By comparing the difference between the results of the branching ratios of D⁺ → η^(')l⁺ν_l 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⁺ν_l decays on the η-η' mixing angle.

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

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Received: 2010-09-10
Revised: 2010-11-19

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2010-09-10

Accepted Date: 2010-11-19

Available Online: 2011-06-05

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⁺ν_l decays with the experimental data. By comparing the difference between the results of the branching ratios of D⁺ → η^(')l⁺ν_l 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⁺ν_l decays on the η-η' mixing angle.

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

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

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