An overview of n and n' decays at BESⅢ

  • The world's largest sample of J/ψ events, 1.31 billion events accumulated at the BESⅢ detector, provides a unique opportunity to investigate n and n' physics via two-body J/ψ radiative or hadronic decays. For many n' decay channels the low background data samples are up to three orders of magnitude larger than collected in any previous experiment. Here we review the most significant results on n and n' obtained at BESⅢ so far. The analyses range from detailed studies of common decay dynamics, observations of new radiative and Dalitz decays, and searches for rare/forbidden decays with sensitivity up to B~10-5. Finally, prospects of forthcoming runs at the J/ψ peak for n and n' physics are discussed.
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Shuang-shi Fang, Andrzej Kupsc and Dai-hui Wei. An overview of n and n' decays at BESⅢ[J]. Chinese Physics C, 2018, 42(4): 042002. doi: 10.1088/1674-1137/42/4/042002
Shuang-shi Fang, Andrzej Kupsc and Dai-hui Wei. An overview of n and n' decays at BESⅢ[J]. Chinese Physics C, 2018, 42(4): 042002.  doi: 10.1088/1674-1137/42/4/042002 shu
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Received: 2017-12-15
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    Supported by National Natural Science Foundation of China (NSFC) (11565006, 11675184, 11735014)

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An overview of n and n' decays at BESⅢ

    Corresponding author: Shuang-shi Fang,
    Corresponding author: Andrzej Kupsc,
    Corresponding author: Dai-hui Wei,
  • 1. Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China
  • 2. University of Chinese Academy of Sciences, Beijing 100049, China
  • 3. Guangxi Normal University, Guilin 541004, China
  • 4.  Uppsala University, Box 516, SE-75120 Uppsala, Sweden
  • 5.  Guangxi Normal University, Guilin 541004, China
Fund Project:  Supported by National Natural Science Foundation of China (NSFC) (11565006, 11675184, 11735014)

Abstract: The world's largest sample of J/ψ events, 1.31 billion events accumulated at the BESⅢ detector, provides a unique opportunity to investigate n and n' physics via two-body J/ψ radiative or hadronic decays. For many n' decay channels the low background data samples are up to three orders of magnitude larger than collected in any previous experiment. Here we review the most significant results on n and n' obtained at BESⅢ so far. The analyses range from detailed studies of common decay dynamics, observations of new radiative and Dalitz decays, and searches for rare/forbidden decays with sensitivity up to B~10-5. Finally, prospects of forthcoming runs at the J/ψ peak for n and n' physics are discussed.

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