Production and decay of a heavy boson in association with top quarks

Abstract

We briefly report on NLO QCD corrections to the $pp\to t\bar{t}B+X$ process, where $B$ stands for $H,W^{\pm }$ or $Z$. In the calculation all double-, single and non-resonant Feynman diagrams, interferences and finite-width effects are included for the top quark and $W^{\pm }/Z$ gauge bosons. Numerical results are shown at the differential cross section level for various factorisation and renormalisation scale settings and a few PDF sets. The main theoretical uncertainties associated with neglected higher-order terms in the perturbative expansion and with different parametrisations of the PDFs are also discussed. Furthermore, we compare our complete predictions for $pp\to t\bar{t}B+X$ in multi-lepton final states to the calculation in the narrow-width approximation.

Comments: 9 pages, 4 figures, Loops and Legs in Quantum Field Theory - LL2022, 25-30 April, 2022, Ettal, Germany. arXiv admin note: text overlap with arXiv:2005.09427