PoS - Proceedings of Science
Volume 416 - Loops and Legs in Quantum Field Theory (LL2022) - Plenary 1
Production and decay of a heavy boson in association with top quarks
M. Worek
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Published on: October 20, 2022
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.
DOI: https://doi.org/10.22323/1.416.0001
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