Associated production of a top pair and a W boson at   next-to-next-to-leading logarithmic accuracy
  We consider soft gluon emission corrections to the production of a top-antitop pair in association with a W boson at the Large Hadron Collider. We obtain a soft-gluon resummation formula for this production process which is valid up to next-to-next-to-leading logarithmic accuracy. We evaluate the soft gluon resummation formula in Mellin space by means of an in-house parton level Monte Carlo code which allows us to obtain predictions for the total cross section as well as for several differential distributions. We study the impact of the soft-gluon resummation corrections in comparison to fixed order calculations. 
Alessandro Broggio, Andrea Ferroglia, Giovanni Ossola and Ben D.   Pecjak
hep-ph