Three-jet DIS final states from kt-dependent parton showers
  Experimental measurements of angular correlations in three-jet final states have recently been performed in DIS.   Next-to-leading-order QCD results for these observables are affected by large theoretical uncertainties in the kinematic region of the data. We discuss the effects of multiple QCD radiation at higher order using parton-shower methods based on transverse-momentum dependent parton distributions and matrix elements. We present Monte-Carlo results for azimuthal two-jet and three-jet distributions, and discuss the comparison with experimental data. 
F. Hautmann and H. Jung