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

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

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

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

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