Glueball spectrum from a potential model

The spectrum of two-gluon glueballs below 3 GeV is investigated in a potential model with a dynamical gluon mass using the variational method. The short-distance potential is approximated by one-gluon exchange, while the long-distance part is taken as a breakable string. The mass and size of the radial as well as orbital excitations up to a principle quantum number $n=3\mathrm{}$ are evaluated. The predicted mass ratios are compared with experimental candidates and lattice results.