Event generators for η/η' decays at BESⅢ

  • The light unflavoured meson η/η' decays are valuable for testing non-perturbative quantum chromodynamics and exploring new physics beyond the Standard Model. This paper describes a series of event generators, including η/η'→γl+l-, η/η'→γπ+π-, η'→ωe+e-, η→π+π-π0, η/η'→π0π0π0, η'→ηππ and η'→π+π-π+π-+π-π0π0, which have been developed for investigating η/η decay dynamics. For most of these generators, their usability has been validated in BESⅢ analyses for determining the detection efficiency, and background studies. The consistency between data and Monte Carlo shows that these generators work well in the BESⅢ simulation, and will also be useful for ongoing BESⅢ analyses and other experiments for studying η/η physics.
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Nian Qin, Zhen-Yu Zhang, Shuang-Shi Fang, Xiang Zhou, Lin-Lin Du and Hao-Xue Qiao. Event generators for η/η' decays at BESⅢ[J]. Chinese Physics C, 2018, 42(1): 013001. doi: 10.1088/1674-1137/42/1/013001
Nian Qin, Zhen-Yu Zhang, Shuang-Shi Fang, Xiang Zhou, Lin-Lin Du and Hao-Xue Qiao. Event generators for η/η' decays at BESⅢ[J]. Chinese Physics C, 2018, 42(1): 013001.  doi: 10.1088/1674-1137/42/1/013001 shu
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Received: 2017-04-01
Revised: 2017-07-29
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    Supported by National Natural Science Foundation of China (NSFC) (11205117, 11575133, 11675184), the China Scholarship Council (201506275156), the Wuhan University PhD Short-time Mobility Program 2016, the Joint Funds of the NSFC and Henan Province (U1504112)

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Event generators for η/η' decays at BESⅢ

    Corresponding author: Zhen-Yu Zhang,
  • 1.  Hubei Nuclear Solid Physics Key Laboratory, Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan 430072, China
  • 2. Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China
  • 3. University of Chinese Academy of Sciences, Beijing 100049, China
  • 4.  College of Phyics and Materials, Henan Normal University, Xinxiang 453000, China
Fund Project:  Supported by National Natural Science Foundation of China (NSFC) (11205117, 11575133, 11675184), the China Scholarship Council (201506275156), the Wuhan University PhD Short-time Mobility Program 2016, the Joint Funds of the NSFC and Henan Province (U1504112)

Abstract: The light unflavoured meson η/η' decays are valuable for testing non-perturbative quantum chromodynamics and exploring new physics beyond the Standard Model. This paper describes a series of event generators, including η/η'→γl+l-, η/η'→γπ+π-, η'→ωe+e-, η→π+π-π0, η/η'→π0π0π0, η'→ηππ and η'→π+π-π+π-+π-π0π0, which have been developed for investigating η/η decay dynamics. For most of these generators, their usability has been validated in BESⅢ analyses for determining the detection efficiency, and background studies. The consistency between data and Monte Carlo shows that these generators work well in the BESⅢ simulation, and will also be useful for ongoing BESⅢ analyses and other experiments for studying η/η physics.

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