  We present the next-to-next-to-leading order (NNLO) QCD corrections to dijet
production in the purely gluonic channel retaining the full dependence on the
number of colours. The sub-leading colour contribution in this channel first
appears at NNLO and, as expected, increases the NNLO correction by around 10%
and exhibits a pT dependence, rising from 8% at low pT to 15% at high pT . The
present calculation demonstrates the utility of the antenna subtraction method
for computing the full colour NNLO corrections to dijet production at the Large
Hadron Collider.
