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

BES Collaboration

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

[1]

BES Collab.. Nucl. Inst. Meth., A344(1994)319.[2] BES合作组, 高能物理与核物理, 19(1995)93.[3] T. Applequist, D. Politzer,Phys. Rev. Lett., 34(1975)43.[4] Particle Data Group, Phys. Rev., D50 Part I (1994).[5] Y. F. Gu . S. F.Tuan, Mod. Phys. Lett., A10(1995)615.[6] S. J. Brodsky, G. P. Lepage, Phys. Rev. D24(1981)2848.

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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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沈阳化工大学材料科学与工程学院沈阳 110142

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