Standard Model Higgs boson production in association with a top anti-top   pair at NLO with parton showering
  We present predictions for the production cross section of a Standard Model Higgs boson in association with a top-antitop pair at next-to-leading order accuracy using matrix elements obtained from the HELAC-Oneloop package. The NLO prediction was interfaced to the PYTHIA and HERWIG shower Monte Carlo programs with the help of POWHEG-Box, allowing for decays of massive particles, showering and hadronization, thus leading to final results at the hadron level. 
M.V. Garzelli, A. Kardos, C.G. Papadopoulos, Z. Trocsanyi
hep-ph hep-ex