期刊论文

Bai, JZ

中文

中国物理C

1674-1137

2000

24

10

892-900

10.3321/j.issn:0254-3052.2000.10.002

国家自然科学基金资助!(199914 80 1982 5116 196 0 50 0 7) 中国科学院重大及特别支持项目!(KJ95T - 0 3)&&

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利用北京谱仪(BES)收集的7.8×10~6J/ψ事例，对J/ψ→γγV(ρ,φ)衰变道中的η(1430)共振态进行了分析。从J/ψ→γγρ衰变模式得到其质量及衰变宽度分别为1431±17MeV和88±28MeV，衰变分支比Br(J/ψ→γη(1430))Br(η(1430)→γρ)=(1.1±0.5±0.3)×10~(-4)；而从J/ψ→γγφ衰变模式得到其质量及衰变宽度分别为1424±15MeV和73±58MeV，衰变分支比Br(J/ψ→γη(1430))Br(η(1430)→γφ)=(2.0±1.0±0.6)×10~(-4)。

Based on 7.8 x 10(6) J/psi events collected by BES experiment, J/psi radiative decay J/psi-->gamma gamma V(rho, phi) have been studied. The eta(1430) resonance has been observed in these two channels respectively. Its mass,width and branching ratio are 1431 +/- 17MeV, 88 +/- 28MeV, and Br (J/psi-->gamma eta(1430)) Br(eta(1430)-->gamma rho) = (1.1 +/- 0.5 +/- 0.3) x 10(-4) from J/psi-->gamma gamma rho mode,1424 +/- 15MeV, 73 +/- 58MeV, and Br(J/psi-->gamma eta(1430)) Br(eta(1430)-->gamma phi) = (2.0 ...