W and Z/gamma* boson production in association with a bottom-antibottom   pair
  We present a study of l\nu b\bar{b} and l+ l- b\bar{b} production at hadron colliders. Our results, accurate to the next-to-leading order in QCD, are based on automatic matrix-element calculations performed by MadLoop and MadFKS, and are given at both the parton level, and after the matching with the Herwig event generator, achieved with aMC@NLO. We retain the complete dependence on the bottom-quark mass, and include exactly all spin correlations of final-state leptons. We discuss the cases of several observables at the LHC which highlight the importance of accurate simulations. 
Rikkert Frederix, Stefano Frixione, Valentin Hirschi, Fabio Maltoni,   Roberto Pittau, Paolo Torrielli
hep-ph