A strangeonium potential model with completeO(v 2/c 2) hyperfine splittings

We model the strangeonium system by numerically solving the Schrödinger equation with a Coulomb plus linear scalar confining potential. All hyperfine terms toO(v ²/c ²) are treated in detail; we show that neglect of spin-independent terms is unjustified. The model is fit to the ?(1019.6) andf′ (1516), and masses for excitedss states are predicted: the strangeonium parameters are contrasted with the values found in charmonium.