  Extending previous work on the predictions for the production of
supersymmetric (SUSY) particles at the LHC, we present the fully differential
calculation of the next-to-leading order (NLO) SUSY-QCD corrections to the
production of squark and squark-antisquark pairs of the first two generations.
The NLO cross sections are combined with the subsequent decay of the final
state (anti)squarks into the lightest neutralino and (anti)quark at NLO
SUSY-QCD. No assumptions on the squark masses are made, and the various
subchannels are taken into account independently. In order to obtain realistic
predictions for differential distributions the fixed-order calculations have to
be combined with parton showers. Making use of the Powheg method we have
implemented our results in the Powheg-Box framework and interfaced the NLO
calculation with the parton shower Monte Carlo programs Pythia6 and Herwig++.
The code is publicly available and can be downloaded from the Powheg-Box
webpage. The impact of the NLO corrections on the differential distributions is
studied and parton shower effects are investigated for different benchmark
scenarios.
