ON THE ELECTRIC DIPOLE TRANSITIONS OF ψ(3770)

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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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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

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)→γχcJ and χcJ→γψ(1S)(J=0,1,2),the calculated rates for ψ(3770)→γχcJ 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.

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