https://doi.org/10.1140/epjc/s10052-024-12737-2
Regular Article - Theoretical Physics
Matrix element corrections in top quark decays for the 
process
1
Division of Particle and Nuclear Physics, Department of Physics, Lund University, Box 118, 221 00, Lund, Sweden
2
Axis Communications, Lund, Sweden
Received:
28
February
2024
Accepted:
29
March
2024
Published online:
22
April
2024
We present a method that allows enabling matrix element corrections (MECs) in Pythia8 with MC@NLO matching, without incurring double counting. MECs are an interesting feature that may contribute to the accuracy of theoretical predictions, alongside matching and merging. We directly compare our method to a specific choice of settings in Pythia8, which can remove double-counting for MECs in certain processes. We show results by taking the 
process as an example. This choice allows us to study the impact of decay MECs in the 
and 
final states. We find that jet-related observables receive these corrections unevenly throughout the phase space. They can contribute up to 
in certain regions.
© The Author(s) 2024
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