Chinese Physics C > 1993, Vol. 17 > Issue(2): 97-106

Experimental Study of Resonance f₂(1270) in the J/ψ Hadronic Decay

BES Collaboration

Institute of High Energy Physics,Acadamia Sinica,Beijing 100039

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Abstract：
Based on the 2.5 million J/ψ's collected by the BES at BEPC,through the hadronic decay J/ψ→ωf ₂(1270),f ₂(1270)→π ⁺π ^－,ω→π ⁺π ^－π ⁰,the properties of the resonance f ₂(1270) are studied:its mass,width,and branching ratio.the angular distribution is fitted with maximum likelihood methood,determining its.J ^PC=2 ⁺⁺and giving in the first time the helicity amplitude ratios of this process as:x=0.99±0.29; y=－0.24±0.17; z ₁=0.90±0.57;z ₂=0.56±0.22.

References

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BES Collaboration. Experimental Study of Resonance f ₂(1270) in the J/ψ Hadronic Decay[J]. Chinese Physics C, 1993, 17(2): 97-106.

BES Collaboration. Experimental Study of Resonance f ₂(1270) in the J/ψ Hadronic Decay[J]. Chinese Physics C, 1993, 17(2): 97-106. 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

Experimental Study of Resonance f₂(1270) in the J/ψ Hadronic Decay

BES Collaboration

Institute of High Energy Physics,Acadamia Sinica,Beijing 100039

Received Date:1900-01-01
Accepted Date:1900-01-01
Available Online:1993-02-05

Abstract:Based on the 2.5 million J/ψ's collected by the BES at BEPC,through the hadronic decay J/ψ→ωf₂(1270),f₂(1270)→π⁺π^－,ω→π⁺π^－π⁰,the properties of the resonance f₂(1270) are studied:its mass,width,and branching ratio.the angular distribution is fitted with maximum likelihood methood,determining its.J^PC=2⁺⁺and giving in the first time the helicity amplitude ratios of this process as:x=0.99±0.29; y=－0.24±0.17; z₁=0.90±0.57;z₂=0.56±0.22.