This analysis examines two-photon decay width in pseudoscalar charmonium, highlighting compatibility with potential models.
We discuss the recent measured partial width of the pseudoscalar charmonium, η-c, into two photons. Predictions for potential models are examined and compared with experimental values. Including radiative corrections, it is found that present measurements are compatible both with a QCD type potential and with a static Coulomb potential, with α-s evaluated at two loops.
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N. et al. (1994) studied this question.
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