Elsevier

Physics Letters B

Volume 67, Issue 4, 25 April 1977, Pages 409-413
Physics Letters B

Sum rules for the decays of the c-even charmonium states

https://doi.org/10.1016/0370-2693(77)90432-4Get rights and content

Abstract

Sum rules for the decays of the C-even charmonium levels (1S0, 3P0, 3P2, 1D2) are derived. These rules are based on the asymptotic freedom of the quantum chromodynamics at small distances and on the analyticity. They refer to the various vacuum amplitudes involving products of charmed quark currents: electromagnetic current as well as currents with quantum numbers JPC=0−+,0++,2++,2−+. The contribution of the continuum to some of the sum rules is small, and they are saturated by the contribution of the lowest charmonium levels. In this way we predict the widths of the two-photon decays of the charmonium states and estimate their total hadronic widths.

References (7)

  • M.A. Shifman et al.

    Phys. Lett.

    (1976)
  • H. Harari

    Phys. Lett.

    (1976)
  • V.A. Novikov et al.

    ITEP-123

    (1976)
There are more references available in the full text version of this article.

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Permanent address: Institute of Nuclear Physics, Novosibirsk 90, USSR.

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