The state of Art Of Monte Carlo for tt+W and tt+Z Processes

The production of top quark in association with heavy boson is important as a signal and background. Due to the large mass of the top quark its Yukawa coupling is about unitary, ttH production offers a unique opportunity for direct measuring of such coupling which is essential to understand elector weak symmetry breaking and could give hints for new physics. ttH multi-lepton channel is the most sensitive channel for ttH and to improve the precision of this channel needs an improving of the modeling of ttV signal. This report study the modeling of the ttV using different Monte Carlo generators.