Charmonium-the 1P1 state

Lai Him Chan, Louisiana State University
R. F. O'Connell, Louisiana State University


Based on a model which gives agreement with the observed hyperfine and fine splitting of the charmonium states, we predict the mass of 1p1 to be 3372 MeV, substantially lower than any previous predicted values. We have also estimated branching ratios and decay rates for the production of this state via channels which become accessible because of its low mass. © 1978.