ON THE ELECTRIC DIPOLE TRANSITIONS OF ψ(3770)

QIN Dan-Hua; DING Yi-Bing; ZHAO Guang-Da

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2024年10月30日

Chinese Physics C> 1990, Vol. 14> Issue(4) : 380-384

ON THE ELECTRIC DIPOLE TRANSITIONS OF ψ(3770)

Department of Physics,Peking University2 Department of Physics,Graduate School,Academia Sinica

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Abstract：
Various E1 transition rates for cc states are calculated in a QCD-motivated potential model.Relativistic corrections are found to be substantial.While a good agreement between theory and experiment is achieved for the rates of ψ(2s)→γχ_cJ and χ_cJ→γψ(1S)(J=0,1,2),the calculated rates for ψ(3770)→γχ_cJ are smaller by a factor of～2 than their experimental values obtained by the MarkⅢ collaboration.The effect of the 2³S₁—1³D1 mixing is possibly important and needed to be considered.

References

[1]

R. H. Schindler, SLAC-PUB-4694 (1988).[2] G. P. Yost et al., Particle Data Group, Phys. Lett., 204B(1988);1.[3] For a recent review see W. Kwong, J. L. Roser, and C. Quigg Annu. Rev. Nucl. Pari, Sci., 37(1987), 325.[4] Y. B. Ding, J. He, S. O. Cai, D. H. Qing, and K. T. Chao, in Proc of the Int. Sym. on Particle and Nuclear Physics, Beijing, Sept 2-7 1985 (World Scientific, Singapore) P. 88.[5] S. W. Otto and J. D. Stack, Phys. Rev. Lett, 52(1984), 2328.D. Barkai, K. J. M. Moriarty, and C. Rebbi, Phys. Rev., D30 (1984), 1293.[6] E. Laermann et al., Phys. Lett., 173B (1986), 437.[7] M .G. Olsson and C. J. Suchyta, Phys. Rev. Lett., 57 (1986), 37[8] R. McClary and N. Byers, Phys. Rev., D28 (1983), 1692.[9] E. Eichten, K. Gottfried, T. Kinoshita, K. D. Lane, and T. M. Yan, Phys. Rev., D21 (1980) 203; D17;(1978), 3090[10] P.Moxhay and J. L. Rosner Phys. Rev., D28 (1983), 1132.[11] S. N. Gupta, S. Radford and S. Repko, Phys. Rev., D31 (1985), 160.

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[20]	LIU Xian-Hui , LI Yang-Guo . QUADRUPOLE TRANSITION WITH π-NUCLEUS DOUBLE CHARGE EXCHANGE. Chinese Physics C, 1983, 7(2): 197-202.

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QIN Dan-Hua, DING Yi-Bing and ZHAO Guang-Da. ON THE ELECTRIC DIPOLE TRANSITIONS OF ψ(3770)[J]. Chinese Physics C, 1990, 14(4): 380-384.

QIN Dan-Hua, DING Yi-Bing and ZHAO Guang-Da. ON THE ELECTRIC DIPOLE TRANSITIONS OF ψ(3770)[J]. Chinese Physics C, 1990, 14(4): 380-384. shu

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Received: 1900-01-01
Revised: 1900-01-01

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

ON THE ELECTRIC DIPOLE TRANSITIONS OF ψ(3770)

Corresponding author: QIN Dan-Hua,

Department of Physics,Peking University2 Department of Physics,Graduate School,Academia Sinica

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1990-04-05

Abstract: Various E1 transition rates for cc states are calculated in a QCD-motivated potential model.Relativistic corrections are found to be substantial.While a good agreement between theory and experiment is achieved for the rates of ψ(2s)→γχ_cJ and χ_cJ→γψ(1S)(J=0,1,2),the calculated rates for ψ(3770)→γχ_cJ are smaller by a factor of～2 than their experimental values obtained by the MarkⅢ collaboration.The effect of the 2³S₁—1³D1 mixing is possibly important and needed to be considered.