Charmonium production in e+e- to psi + X(cbar c) and e+e- to D*D_J
classification
✦ hep-ph
keywords
productionamplitudechannelscharmoniumdatadiscusseddominanceeffective
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The dominance of chi_0 in the data for e+e- to psi + chi_J(c\bar{c}) is shown to violate OZI factorization. Single gluon exchange gives a non-factorizing effective S.L interaction that generates a large scalar production amplitude. This also has observable effects near threshold in e+e- to D*D_J, where enhancements of D*D_0 and DD_1 channels are predicted. Further tests and implications are discussed.
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