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Image showing Leif

Leif Gellersen

Postdoc

Image showing Leif

Matrix element corrections in top quark decays for the tt¯W± process

Author

  • Rikkert Frederix
  • Leif Gellersen
  • Jasmina Nasufi

Summary, in English

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 tt¯W process as an example. This choice allows us to study the impact of decay MECs in the 2SSℓ and 3ℓ final states. We find that jet-related observables receive these corrections unevenly throughout the phase space. They can contribute up to ±6% in certain regions.

Department/s

  • Particle and nuclear physics

Publishing year

2024-04

Language

English

Publication/Series

European Physical Journal C

Volume

84

Issue

4

Document type

Journal article

Publisher

Springer

Topic

  • Computer Vision and Robotics (Autonomous Systems)

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044