  We consider double $gg\rightarrow g$ production in the presence of a bias on
the unintegrated gluon distribution of the colliding hadron or nuclei. Such
bias could be due to the selection of configurations with a greater number of
gluons or higher mean transverse momentum squared or, more generally, due to a
modified spectral shape of the gluon distribution in the hadrons. Hence, we
consider reweighted functional averages over the stochastic ensemble of small-x
gluons. We evaluate explicitly the double inclusive gluon transverse momentum
spectrum in high-energy collisions, and their azimuthal correlations, for a few
simple examples of biases.
