We use spinor helicity methods to calculate the azimuthal
angular correlations between three partons produced in Deep Inelstic
Scattering (DIS) at small Bjorken x. We show that gluon saturation
effects in the proton or nucleus target lead to a broadening and
disappearance of the two away side peaks. We show how our results
may be used to include the effects of fully coherent cold matter
energy loss in di-jet production in DIS at small x
