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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

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

  • 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'.
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  • References

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

  • 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'.

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