Looking for new physics via semi-leptonic and leptonic rare decays of D and D<sub>s</sub>

Xing-Dao Guo; Xi-Qing Hao; Hong-Wei Ke; Ming-Gang Zhao; Xue-Qian Li

doi:10.1088/1674-1137/41/9/093107

Chinese Physics C> 2017, Vol. 41> Issue(9) : 093107 DOI: 10.1088/1674-1137/41/9/093107

Looking for new physics via semi-leptonic and leptonic rare decays of D and D_s

Xing-Dao Guo ^1,4,, ,
Xi-Qing Hao ^2,, ,
Hong-Wei Ke ^3,, ,
Ming-Gang Zhao ^4,, ,
Xue-Qian Li ^4,,

1.
School of Physics and Math, Xuzhou University of Technology, Xuzhou 221111, China
2.
Department of Physics, Nankai University, Tianjin 300071, China
3.
Physics Department, Henan Normal University, Xinxiang 453007, China
4.
School of Science, Tianjin University, Tianjin 300072, China
5.
Department of Physics, Nankai University, Tianjin 300071, China

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Abstract：
It is well recognized that looking for new physics at lower energy colliders is a path which is complementary to high energy machines such as the LHC. Using the large volume of data collected by BESⅢ, we may have a unique opportunity to tackle this. In this paper we calculate the branching ratios of the semi-leptonic processes D_s⁺ → K⁺ e^-e⁺ and D_s⁺ →K⁺ e^-μ⁺, and the leptonic processes D⁰ → e^-e⁺ and D⁰ → e^-μ⁺, in the frameworks of the U(1)' model, 2HDM and unparticle model. It is found that both the U(1)' model and 2HDM may influence the semi-leptonic decay rates, but only the U(1)' model offers substantial contributions to the pure leptonic decays, and the resultant branching ratio of D⁰ → e^-μ⁺ can be as large as 10^-7~10^-8. This might be observed at the future super τ-charm factory.
- rare decay ,
- D meson ,
- LFV

References

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Xing-Dao Guo, Xi-Qing Hao, Hong-Wei Ke, Ming-Gang Zhao and Xue-Qian Li. Looking for new physics via semi-leptonic and leptonic rare decays of D and D_s[J]. Chinese Physics C, 2017, 41(9): 093107. doi: 10.1088/1674-1137/41/9/093107

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Received: 2017-04-10

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Supported by National Natural Science Foundation of China (11675082, 11375128, 11405046) and Special Grant of the Xuzhou University of Technology (XKY2016211)

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沈阳化工大学材料科学与工程学院沈阳 110142

Looking for new physics via semi-leptonic and leptonic rare decays of D and D_s

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