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《中国物理C》(英文)编辑部
2024年10月30日

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

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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 Ds[J]. Chinese Physics C, 2017, 41(9): 093107. doi: 10.1088/1674-1137/41/9/093107
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 Ds[J]. Chinese Physics C, 2017, 41(9): 093107.  doi: 10.1088/1674-1137/41/9/093107 shu
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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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Looking for new physics via semi-leptonic and leptonic rare decays of D and Ds

    Corresponding author: Xing-Dao Guo,
    Corresponding author: Xi-Qing Hao,
    Corresponding author: Hong-Wei Ke,
    Corresponding author: Ming-Gang Zhao,
    Corresponding author: Xue-Qian Li,
  • 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
Fund Project:  Supported by National Natural Science Foundation of China (11675082, 11375128, 11405046) and Special Grant of the Xuzhou University of Technology (XKY2016211)

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 Ds+ → K+ e-e+ and Ds+ →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.

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