Pseudoscalar mixing in J/ψ and ψ(2S) decay

  • Based on the branching fractions of J/ψ(ψ(2S))→VP from different collaborations, pseudoscalar mixing is extensively discussed with a well established phenomenological model. The mixing angle is determined to be -14° by fitting to the new world average if only quark content is considered. After taking into account the gluonic content in η and η′ simultaneously, the investigation shows that η favors only consisting of light quarks, while the gluonic content of η′ is Zη′2=0.30±0.24.

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WEI Dai-Hui and YANG Yong-Xu. Pseudoscalar mixing in J/ψ and ψ(2S) decay[J]. Chinese Physics C, 2010, 34(12): 1785-1790. doi: 10.1088/1674-1137/34/12/002
WEI Dai-Hui and YANG Yong-Xu. Pseudoscalar mixing in J/ψ and ψ(2S) decay[J]. Chinese Physics C, 2010, 34(12): 1785-1790.  doi: 10.1088/1674-1137/34/12/002 shu
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Received: 2010-07-23
Revised: 2010-08-17
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Pseudoscalar mixing in J/ψ and ψ(2S) decay

    Corresponding author: WEI Dai-Hui,

Abstract: 

Based on the branching fractions of J/ψ(ψ(2S))→VP from different collaborations, pseudoscalar mixing is extensively discussed with a well established phenomenological model. The mixing angle is determined to be -14° by fitting to the new world average if only quark content is considered. After taking into account the gluonic content in η and η′ simultaneously, the investigation shows that η favors only consisting of light quarks, while the gluonic content of η′ is Zη′2=0.30±0.24.

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