  We formulate a framework to determine the mass of glueball states of Landau
gauge Yang-Mills theory in the continuum. To this end we derive a
Bethe-Salpeter equation for two gluon bound states including the effects of
Faddeev-Popov ghosts. We construct a suitable approximation scheme such that
the interactions in the bound state equation match a corresponding successful
approximation of the Dyson-Schwinger equations for the Landau gauge ghost and
gluon propagators. Based upon a recently obtained solution for the propagators
in the complex momentum plane we obtain results for the mass of the scalar and
pseudoscalar glueballs. In the scalar channel we find a mass value in agreement
with lattice gauge theory.
