Measurements of the Branching Ratios for the Decays J/ψ→γπ<SUP>0</SUP>,γη, γη'→ 3γ at BES

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> 1997, Vol. 21> Issue(5) : 385-392

Measurements of the Branching Ratios for the Decays J/ψ→γπ⁰,γη, γη'→ 3γ at BES

BES Collaboration

Institute of High Energy Physics, The Chinese Academy of Scinces, Beijing 100039

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Abstract：
Decays of the J/ψ resonance into the final states with three photons are investigated.Branching ratios for the decays of J/ψ→γπ⁰ and J/ψ→γη'are determined to be Br (J/ψ→γπ⁰)=(4.6±1.1)×10^－5 and. Br(J/ψ→γη')＝(4.12±0.82)×10^－3. The ratio of the two decay rates,(J/ψ→γη')/(J/ψ→γη),is 4.79±0.85. Within experimental errors, this value agrees well with the predictions of two theoretical models'.

References

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丁慧良等、高能物理与核物理，16（1992）769,[2]周月华等，高能物理与核物理，13（1989）973.[3]过雅南、郁忠强等，高能物理与核物理，14（1990）1057.[4]M,Krammer et al.,Nucl.Phys.,B229（1983）115.[5]T.F.Walsh,Nuow.Cim Lett.,14（1975）290.[6]E.D.Bloom,G.W.Peck,Ann.Rev.Nucl.and Part.Scie,33（1983）143.[7]H.Fritzsch et.al.,Phys.Lett.,B66（1977）365.[8]郁宏，高能物理与核物理，12（1988）754.[9]R.M.Bamett et al.,physical Review,D54（1996）1.

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BES Collaboration. Measurements of the Branching Ratios for the Decays J/ψ→γπ⁰,γη, γη'→ 3γ at BES[J]. Chinese Physics C, 1997, 21(5): 385-392.

BES Collaboration. Measurements of the Branching Ratios for the Decays J/ψ→γπ⁰,γη, γη'→ 3γ at BES[J]. Chinese Physics C, 1997, 21(5): 385-392. 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

Measurements of the Branching Ratios for the Decays J/ψ→γπ⁰,γη, γη'→ 3γ at BES

BES Collaboration

Institute of High Energy Physics, The Chinese Academy of Scinces, Beijing 100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1997-05-05

Abstract: Decays of the J/ψ resonance into the final states with three photons are investigated.Branching ratios for the decays of J/ψ→γπ⁰ and J/ψ→γη'are determined to be Br (J/ψ→γπ⁰)=(4.6±1.1)×10^－5 and. Br(J/ψ→γη')＝(4.12±0.82)×10^－3. The ratio of the two decay rates,(J/ψ→γη')/(J/ψ→γη),is 4.79±0.85. Within experimental errors, this value agrees well with the predictions of two theoretical models'.