Study of D0→π－l+νl Decay

WU Xiang-Yao; LIU Xiao-Jing; GONG Pi-Feng; LI Qi-Lang; SHI Zong-Hua; GUO Yi-Qing

Chinese Physics C> 2006, Vol. 30> Issue(11) : 1048-1052

Study of D⁰→π^－l⁺ν_l Decay

Institute of Physics, Jilin Normal University, Jilin Siping 136000, China2 Institute of Physics and Engineering, Qufu Normal University, Qufu 273165, China3 Department of Mathematics & Physics, Institute of Architecture & Industry, Hefei 230022, China4 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

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Abstract：
In this paper, the D⁰→π^－l⁺ν_l decay process is studied by applying light-cone QCD sum rules. The form factor of D→π transition is calculated by choosing a correlation function with a chiral current to eliminate the effect caused by the uncertainty of the twist-3 function of the pion. Therefore the calculated result of the form factor is improved, and the branching ratio of the D⁰→π^－l⁺ν_l decay process is consistent with the new experimental data.

References

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. Shifman M ., Vainshtein A ., Zakharov V I. Nucl. Phys., 197., B147: 3852. Wise M B. Phys. Lett., 199., B303: 1353. Georgi H. Phys. Lett., 199., B240: 4474. Aubin C, Bernard ., DeTar C et al. Phys. Rev. Lett., 200., 94: 0116015. Richard Hill J. Phys. Rev., 200., D73: 0140126. YANG Mao-Zhi. Phys. Rev., 200., D73: 0340277. Khodjamirian ., Ruckl., Weinzierl S et al. Phys. Lett., 199., B410: 2758. HUANG T, LI Z H. Phys. Rev., 199., D57: 19939. HUANG T, LI Z ., WU X Y. Phys. Rev., 200., D63:094001-110. Khodjamirian A. Nucl. Phys., 200., B605: 55811. Khodjamirian ., Ruckl., Weinzierl S et al. Phys. Rev., 200., D62: 11400212. Hagiward K et al. Phys. Rev., 200., D66: 01000113. Yongsheng G. Semileptonic D Decays from CLEO andBELLE. hep-ex/0411014

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WU Xiang-Yao, LIU Xiao-Jing, GONG Pi-Feng, LI Qi-Lang, SHI Zong-Hua and GUO Yi-Qing. Study of D⁰→π^－l⁺ν_l Decay[J]. Chinese Physics C, 2006, 30(11): 1048-1052.

WU Xiang-Yao, LIU Xiao-Jing, GONG Pi-Feng, LI Qi-Lang, SHI Zong-Hua and GUO Yi-Qing. Study of D⁰→π^－l⁺ν_l Decay[J]. Chinese Physics C, 2006, 30(11): 1048-1052. shu

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Received: 2006-03-10
Revised: 2006-04-28

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Study of D⁰→π^－l⁺ν_l Decay

Corresponding author: WU Xiang-Yao,

Institute of Physics, Jilin Normal University, Jilin Siping 136000, China2 Institute of Physics and Engineering, Qufu Normal University, Qufu 273165, China3 Department of Mathematics & Physics, Institute of Architecture & Industry, Hefei 230022, China4 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2006-03-10
Accepted Date: 2006-04-28
Available Online: 2006-11-05

Abstract: In this paper, the D⁰→π^－l⁺ν_l decay process is studied by applying light-cone QCD sum rules. The form factor of D→π transition is calculated by choosing a correlation function with a chiral current to eliminate the effect caused by the uncertainty of the twist-3 function of the pion. Therefore the calculated result of the form factor is improved, and the branching ratio of the D⁰→π^－l⁺ν_l decay process is consistent with the new experimental data.