New Suppression Mode of the ψ(2S) Hadronic Decay

BES Collaboration

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 1995, Vol. 19> Issue(1) : 93-96

New Suppression Mode of the ψ(2S) Hadronic Decay

BES Collaboration

Institute of High Enerty Physics, Acadamia Scinica, Beijing 100039

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Abstract：
The hadronic decays ,and ωf2(1270) have been studied in a sample of 1.27 million produced.Measurements of their branching fractions are presented. While obeys the "14% rule" predicted by theory, →ωf2 (1270) is suppressed comparing with the corresponding decay. As a vector-tensor pair combination, the ωf2 mode is the first example of a non-vector-pseudoscalar decay of charmonium which violates the above mentioned rule.

References

[1]	北京谱仪合作组，丁慧良等，高能物理与核物理，16（1992）769.[2]M.E.B.Franklinetal.,Phys.Rev.Letter,51（1983）963.[3]W.Toki,1989 International Symposium on Heavy Quark Physics,Cornell University,Ithaca,NY,June13-17,1989.[4]Particle Data Group,K.Hikasaetal.,Phys.Rev,D45（1992）.

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[16]	BES Collaboration . Abnormal Suppression of Vector-Tensor Decays of ψ(2S). Chinese Physics C, 1997, 21(1): 89-96.
[17]	BES Collaboration . Determination of J/ψ Leptonic Branching Fraction Via ψ(2S)→π⁺π^－J/ψ. Chinese Physics C, 1996, 20(2): 97-106.
[18]	BES Collaboration . Study of ψ(2S)Decays into pπ and KK. Chinese Physics C, 1996, 20(6): 481-490.
[19]	BES Collaboration . Study of ψ(2S) Decay to τ Lepton Pairs. Chinese Physics C, 1995, 19(7): 577-584.
[20]	BES Collaboration . Experimental Study of Resonance f₂(1270) in the J/ψ Hadronic Decay. Chinese Physics C, 1993, 17(2): 97-106.

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BES Collaboration. New Suppression Mode of the ψ(2S) Hadronic Decay[J]. Chinese Physics C, 1995, 19(1): 93-96.

BES Collaboration. New Suppression Mode of the ψ(2S) Hadronic Decay[J]. Chinese Physics C, 1995, 19(1): 93-96. 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

New Suppression Mode of the ψ(2S) Hadronic Decay

BES Collaboration

Institute of High Enerty Physics, Acadamia Scinica, Beijing 100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1995-01-05

Abstract: The hadronic decays ,and ωf2(1270) have been studied in a sample of 1.27 million produced.Measurements of their branching fractions are presented. While obeys the "14% rule" predicted by theory, →ωf2 (1270) is suppressed comparing with the corresponding decay. As a vector-tensor pair combination, the ωf2 mode is the first example of a non-vector-pseudoscalar decay of charmonium which violates the above mentioned rule.