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Chinese Physics C> 2007, Vol. 31> Issue(7) : 686-701 

Study of the ρπ Puzzle in Charmonium Decays

  •  Institute of High Energy Physics, CAS, Beijing 100049, China

  • The theoretical explanations about the "ρπ" in charmonium decays are reviewed extensively, and the comparison of theoretical predications with experimental data is made whenever possible. Three methods to estimate the ratio of the branching fractions of J/ψ and ψ′ decays are also discussed. It is pointed out that in order to understand the ρπ puzzle, and the dynamics of charmonium decays, systematic studies should be made in theory, phenomenology and experiment aspects.
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MO Xiao-Hu, YUAN Chang-Zheng and WANG Ping. Study of the ρπ Puzzle in Charmonium Decays[J]. Chinese Physics C, 2007, 31(7): 686-701.
MO Xiao-Hu, YUAN Chang-Zheng and WANG Ping. Study of the ρπ Puzzle in Charmonium Decays[J]. Chinese Physics C, 2007, 31(7): 686-701. shu
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Received: 2006-11-16
Revised: 2006-12-20
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Study of the ρπ Puzzle in Charmonium Decays

    Corresponding author: YUAN Chang-Zheng,
  • Institute of High Energy Physics, CAS, Beijing 100049, China
  • Received Date: 2006-11-16
  • Accepted Date: 2006-12-20
  • Available Online: 2007-07-05

Abstract: The theoretical explanations about the "ρπ" in charmonium decays are reviewed extensively, and the comparison of theoretical predications with experimental data is made whenever possible. Three methods to estimate the ratio of the branching fractions of J/ψ and ψ′ decays are also discussed. It is pointed out that in order to understand the ρπ puzzle, and the dynamics of charmonium decays, systematic studies should be made in theory, phenomenology and experiment aspects.

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