Chinese Physics C > 2000, Vol. 24 > Issue(10): 892-900

Study of Decay J/ψ→γγV(ρ,φ)

BESCollaboration

Institute of High Energy Physics,CAS,Beijing 100039,China

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Abstract：
Based on 7.8×10 ⁶J/ψ events collected by BES experiment,J/ψ radiative decay J/ψ→γγV(ρ,φ) have been studied. The η(1430) resonance has been observed in these two channels respectively. Its mass,width and branching ratio are 1431±17MeV,88±28MeV,and Br(J/ψ→γη(1430)) Br(η(1430)→γρ)=(1.1±0.5±0.3)×10 ^－4from J/ψ→γγρ mode,1424±15MeV,73±58MeV,and Br(J/ψ→γη(1430))Br(η(1430)→γφ)=(2.0±1.0±0.6)×10 ^－4from J/ψ→γγφ mode.

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BESCollaboration. Study of Decay J/ψ→γγV(ρ,φ)[J]. Chinese Physics C, 2000, 24(10): 892-900.

BESCollaboration. Study of Decay J/ψ→γγV(ρ,φ)[J]. Chinese Physics C, 2000, 24(10): 892-900. shu

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Received: 2000-03-28
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

Study of Decay J/ψ→γγV(ρ,φ)

BESCollaboration

Institute of High Energy Physics,CAS,Beijing 100039,China

Received Date:2000-03-28
Accepted Date:1900-01-01
Available Online:2000-10-05

Abstract:Based on 7.8×10⁶J/ψ events collected by BES experiment,J/ψ radiative decay J/ψ→γγV(ρ,φ) have been studied. The η(1430) resonance has been observed in these two channels respectively. Its mass,width and branching ratio are 1431±17MeV,88±28MeV,and Br(J/ψ→γη(1430)) Br(η(1430)→γρ)=(1.1±0.5±0.3)×10^－4from J/ψ→γγρ mode,1424±15MeV,73±58MeV,and Br(J/ψ→γη(1430))Br(η(1430)→γφ)=(2.0±1.0±0.6)×10^－4from J/ψ→γγφ mode.