  Correlations in the azimuthal angle between the two largest transverse
momentum jets have been measured using the D0 detector in pp-bar collisions at
a center-of-mass energy sqrt(s)=1.96 TeV. The analysis is based on an inclusive
dijet event sample in the central rapidity region corresponding to an
integrated luminosity of 150 pb-1. Azimuthal correlations are stronger at
larger transverse momenta. These are well-described in perturbative QCD at
next-to-leading order in the strong coupling constant, except at large
azimuthal differences where soft effects are significant.
