On improving NLO merging for t t ¯ W production
(2021) In Journal of High Energy Physics 2021(11).- Abstract
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... (More)
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.
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- author
- Frederix, Rikkert
LU
and Tsinikos, Ioannis LU
- organization
- publishing date
- 2021-11
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- NLO Computations, QCD Phenomenology
- in
- Journal of High Energy Physics
- volume
- 2021
- issue
- 11
- article number
- 29
- publisher
- Springer
- external identifiers
-
- scopus:85118710164
- ISSN
- 1029-8479
- DOI
- 10.1007/JHEP11(2021)029
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021, The Author(s).
- id
- 1dc87a97-ffc3-4358-ae85-30d0e7423593
- date added to LUP
- 2021-11-30 21:28:21
- date last changed
- 2024-04-20 17:47:10
@article{1dc87a97-ffc3-4358-ae85-30d0e7423593, abstract = {{<p>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.</p>}}, author = {{Frederix, Rikkert and Tsinikos, Ioannis}}, issn = {{1029-8479}}, keywords = {{NLO Computations; QCD Phenomenology}}, language = {{eng}}, number = {{11}}, publisher = {{Springer}}, series = {{Journal of High Energy Physics}}, title = {{On improving NLO merging for t t ¯ W production}}, url = {{http://dx.doi.org/10.1007/JHEP11(2021)029}}, doi = {{10.1007/JHEP11(2021)029}}, volume = {{2021}}, year = {{2021}}, }