NLO QCD predictions for ttbb production in association with a light-jet at the LHC
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https:\\/\\/zoom.us\\/j\\/286831423
Precise measurements of Higgs boson production in association with top-quark pairs allow for constraints on the top-quark Yukawa coupling, which in turn is crucial to fully characterise the scalar sector of the Standard Model and could also open a window on Beyond-the-Standard-Model interactions. At the LHC, searches for ttH production in the dominant H->bb channel are plagued by a large QCD background, which is dominated by top-anti top production in association with a bottom-anti bottom pair. The detailed understanding of this multi-particle and multi-scale background process is of crucial importance for the sensitivity of ttH(->bb) analyses. Motivated by the fact that state-of-the-art Monte Carlo simulations for this background suffer from uncertainties related to the modelling of extra light-jet radiation, we present a study for ttbb+jet production at NLO QCD. The focus is on effects and uncertainties on observables relevant for ttH(bb) analyses.