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S波自旋单态底夸克偶素衰变到粲夸克对

孙佳佳 张玉洁 熊畅

孙佳佳, 张玉洁, 熊畅等 . S波自旋单态底夸克偶素衰变到粲夸克对[J]. 北京航空航天大学学报, 2019, 45(1): 212-217. doi: 10.13700/j.bh.1001-5965.2018.0267
引用本文: 孙佳佳, 张玉洁, 熊畅等 . S波自旋单态底夸克偶素衰变到粲夸克对[J]. 北京航空航天大学学报, 2019, 45(1): 212-217. doi: 10.13700/j.bh.1001-5965.2018.0267
SUN Jiajia, ZHANG Yujie, XIONG Changet al. S-wave spin singlet bottomonium decay to charm quark pair[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(1): 212-217. doi: 10.13700/j.bh.1001-5965.2018.0267(in Chinese)
Citation: SUN Jiajia, ZHANG Yujie, XIONG Changet al. S-wave spin singlet bottomonium decay to charm quark pair[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(1): 212-217. doi: 10.13700/j.bh.1001-5965.2018.0267(in Chinese)

S波自旋单态底夸克偶素衰变到粲夸克对

doi: 10.13700/j.bh.1001-5965.2018.0267
基金项目: 中央高校基本科研业务费专项资金
详细信息
    作者简介:

    孙佳佳  女, 硕士研究生。主要研究方向:物理学

    熊畅  女, 博士, 实验员。主要研究方向:物理学

    通讯作者:

    熊畅, E-mail: 09434@buaa.edu.cn

  • 中图分类号: O572.24;O572.22

S-wave spin singlet bottomonium decay to charm quark pair

Funds: the Fundamental Research Funds for the Central Universities
More Information
  • 摘要:

    对S波自旋单态底夸克偶素衰变到粲夸克对进行了研究,同时还研究了S波自旋单态和自旋三重态底夸克偶素衰变到D介子对。利用BaBar实验组测量得到的自旋三重态底夸克偶素衰变到D介子分支比的数据,发现自旋三重态底夸克偶素的色八重态矩阵元远小于理论预言,理论预言要比实验上限大20倍以上;得到S波自旋单态底夸克偶素衰变到粲夸克对的分支比的理论预言,可以进行实验测量从而研究色八重态矩阵元;得到S波自旋单态底夸克偶素衰变到D介子对的分支比的理论预言,与其他理论预言差异较大。这些预言可以通过BelleⅡ的实验进行验证,从而得到更多强子化的信息。

     

  • 图 1  ηb→cc的费曼图

    Figure 1.  Feynman diagram of ηb→cc

    图 2  ηb(1S01)→ccg的费曼图

    Figure 2.  Feynman diagram of ηb(1S01)→ccg

    图 3  归一化后相对的Br[ηb→ccg]对于胶子能量的分布

    Figure 3.  Distribution of gluon energy of normalized relative Br[ηb→ccg]

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出版历程
  • 收稿日期:  2018-05-10
  • 录用日期:  2018-05-18
  • 刊出日期:  2019-01-20

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