A Lattice Study of the Gluon Propagator in the Landau Gauge

We present the results of two high-statistics studies of the gluon propagator in the Landau gauge, at $\beta =6.0$, on different lattice volumes. The dependence of the propagator on the momenta is well described by the expression $G(k^2)=[M^2+Z\cdot k^2(k^2\mathrm{/}{\mathrm{\Lambda }}^2{)}^{\eta }){]}^{-1}$. We obtain a precise determination of $\eta =0.532(12)$, and verify that $M^2$ does not vanish in the infinite volume limit.