Experimental Study of f<sub>2</sub>(1270) in the J/ψ Hadronic Decay

BES Collaboration

Chinese Physics C> 1992, Vol. 16> Issue(S4) : 385-393

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

BES Collaboration

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Abstract：
Based on the 2.5 million J/ψ's collected by the Beijing spectrometer at the Beijing electron positron collider, through the hadronic decay J/ψ → ωf₂ (1270),f₂(1270) → π⁺π^-, ω→π⁺π^-π⁰, we studied the properties of the resonance f₂(1270):the mass,width, and branching ratio. The angular distribution is Otted with the maximum likelihood method, determining its spin-parity J^PC=2⁺⁺, and giving for the first time the helicity amplitude ratios of this process as:x=0.99 ±0.29, y=-0.24 ±017, z₁=0.90 ±0,57, z₂=0.56 ±022.
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BES Collaboration. Experimental Study of f₂(1270) in the J/ψ Hadronic Decay[J]. Chinese Physics C, 1992, 16(S4): 385-393.

BES Collaboration. Experimental Study of f₂(1270) in the J/ψ Hadronic Decay[J]. Chinese Physics C, 1992, 16(S4): 385-393. shu

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Received: 1992-09-15

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Supported by the National Natural Science Foundation of China.

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通讯作者: 陈斌, bchen63@163.com

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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 f₂(1270) in the J/ψ Hadronic Decay

BES Collaboration

Received Date: 1992-09-15

Fund Project: Supported by the National Natural Science Foundation of China.

Abstract: Based on the 2.5 million J/ψ's collected by the Beijing spectrometer at the Beijing electron positron collider, through the hadronic decay J/ψ → ωf₂ (1270),f₂(1270) → π⁺π^-, ω→π⁺π^-π⁰, we studied the properties of the resonance f₂(1270):the mass,width, and branching ratio. The angular distribution is Otted with the maximum likelihood method, determining its spin-parity J^PC=2⁺⁺, and giving for the first time the helicity amplitude ratios of this process as:x=0.99 ±0.29, y=-0.24 ±017, z₁=0.90 ±0,57, z₂=0.56 ±022.