Abnormal Suppression of Vector-Tensor Decays of ψ(2S)

BES Collaboration

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2024年10月30日

Chinese Physics C> 1997, Vol. 21> Issue(1) : 89-96

Abnormal Suppression of Vector-Tensor Decays of ψ(2S)

BES Collaboration

Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039

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Abstract：
The hadronic decays ψ(2S)→ρα₂ and K^*0K₂^*0+c.c. have been studied in a sample of 3.6×10⁶ ψ(2S) events.Measurements of their branching fractions are presented.Both channels violate the “15% rule” predicted by perturbative QCD compared with the corresponding J/ψ decays.These results serve as new examples of abnormal suppression of ψ(2S) decays into vector-tensor final states that was first observed in ψ(2S)→ωf₂

References

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[11]	WANG Ping , YUAN Chang-Zheng , MO Xiao-Hu . Contribution of One-Photon Annihilation at ψ(2S) in e⁺e^－ Experiment. Chinese Physics C, 2003, 27(6): 465-473.
[12]	MO Xiao-Hu , ZHU Yong-Sheng . Determination of Decay Width Error and Luminosity in ψ(2S) Scan. Chinese Physics C, 2001, 25(12): 1133-1139.
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[14]	Li Xinhua , Gu Yifan . Comments on the Ratio of Hadronic Decay Rates of ψ(2S)to J/ψ. Chinese Physics C, 1998, 22(4): 293-298.
[15]	BES Collaboration . Determination of J/ψ Leptonic Branching Fraction Via ψ(2S)→π⁺π^－J/ψ. Chinese Physics C, 1996, 20(2): 97-106.
[16]	BES Collaboration . Study of ψ(2S)Decays into pπ and KK. Chinese Physics C, 1996, 20(6): 481-490.
[17]	BES Collaboration . Study of ψ(2S) Decay to τ Lepton Pairs. Chinese Physics C, 1995, 19(7): 577-584.
[18]	BES Collaboration . New Suppression Mode of the ψ(2S) Hadronic Decay. Chinese Physics C, 1995, 19(1): 93-96.
[19]	BES Collaboration . Experimental Study of Resonance f₂(1270) in the J/ψ Hadronic Decay. Chinese Physics C, 1993, 17(2): 97-106.
[20]	YUE Chongxing , LU Gongru . Investigation of Technivector Mesons Decay. Chinese Physics C, 1993, 17(11): 1002-1010.

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BES Collaboration. Abnormal Suppression of Vector-Tensor Decays of ψ(2S)[J]. Chinese Physics C, 1997, 21(1): 89-96.

BES Collaboration. Abnormal Suppression of Vector-Tensor Decays of ψ(2S)[J]. Chinese Physics C, 1997, 21(1): 89-96. shu

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Received: 1900-01-01
Revised: 1900-01-01

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Abnormal Suppression of Vector-Tensor Decays of ψ(2S)

BES Collaboration

Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1997-01-05

Abstract: The hadronic decays ψ(2S)→ρα₂ and K^*0K₂^*0+c.c. have been studied in a sample of 3.6×10⁶ ψ(2S) events.Measurements of their branching fractions are presented.Both channels violate the “15% rule” predicted by perturbative QCD compared with the corresponding J/ψ decays.These results serve as new examples of abnormal suppression of ψ(2S) decays into vector-tensor final states that was first observed in ψ(2S)→ωf₂