Rikkert Frederix
Senior lecturer
On improving NLO merging for t t ¯ W production
Author
Summary, in English
We introduce an improvement to the FxFx matrix element merging procedure for pp →tt¯ W production at NLO in QCD with one and/or two additional jets. The main modification is an improved treatment of jets that are not logarithmically enhanced in the low transverse-momentum regime. We provide predictions for the inclusive cross section and the tt¯ W differential distributions including parton-shower effects. Taking also the NLO EW corrections into account, this results in the most-accurate predictions for this process to date. We further proceed to include the on-shell LO decays of the tt¯ W including the tree-level spin correlations within the narrow-width approximation, focusing on the multi-lepton signatures studied at the LHC. We find a ∼30% increase over the NLO QCD prediction and large non-flat K-factors to differential distributions.
Department/s
- Theoretical Particle Physics - Has been reorganised
Publishing year
2021-11
Language
English
Publication/Series
Journal of High Energy Physics
Volume
2021
Issue
11
Document type
Journal article
Publisher
Springer
Topic
- Subatomic Physics
Keywords
- NLO Computations
- QCD Phenomenology
Status
Published
ISBN/ISSN/Other
- ISSN: 1029-8479