Volume 476 - 42nd International Conference on High Energy Physics (ICHEP2024) - Top Quark and Electroweak Physics
$t\bar{t}t\bar{t}$: NLO QCD corrections in production and decays for the $4\ell$ channel
N. Dimitrakopoulos
Full text: pdf
Pre-published on: December 17, 2024
Published on: April 29, 2025
Abstract
We briefly summarise the results for the four top-quark production process in the 4$\ell$ decay channel at NLO accuracy in perturbative QCD. We employ the narrow-width approximation for the treatment of the unstable particles, preserving spin correlations to NLO accuracy throughout our computations. The NLO QCD corrections are applied to both the production and decays of the four tops. We investigate the overall size of the NLO QCD corrections and the impact of neglecting higher-order effects in top-quark decays.
DOI: https://doi.org/10.22323/1.476.0367
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