W+jets, Z+jets, multijets and new physics searches
  W+jets, Z+jets and QCD multijet production processes at hadron colliders are backgrounds to many searches for physics beyond the Standard Model which involve leptons and missing energy in the final state. We review the current theoretical and experimental status of these processes at the LHC. Furthermore, we discuss several methods that allow for reliable predictions for these processes in the context of new-physics searches. 
Christoph Englert, Erik Gerwick, Tilman Plehn, Peter Schichtel,   Steffen Schumann
hep-ph