On improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production
Abstract We introduce an improvement to the FxFx matrix element merging procedure for pp → t t ¯ W $$ t\overline{t}W $$ 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-mom...
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2021
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oai:doaj.org-article:89c3362bb95a4d59b2d83a30d8652d2e2021-11-08T11:16:35ZOn improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production10.1007/JHEP11(2021)0291029-8479https://doaj.org/article/89c3362bb95a4d59b2d83a30d8652d2e2021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)029https://doaj.org/toc/1029-8479Abstract We introduce an improvement to the FxFx matrix element merging procedure for pp → t t ¯ W $$ t\overline{t}W $$ 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 t t ¯ W $$ t\overline{t}W $$ 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 t t ¯ W $$ t\overline{t}W $$ 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.Rikkert FrederixIoannis TsinikosSpringerOpenarticleNLO ComputationsQCD PhenomenologyNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-23 (2021) |
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DOAJ |
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DOAJ |
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EN |
| topic |
NLO Computations QCD Phenomenology Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 |
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NLO Computations QCD Phenomenology Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Rikkert Frederix Ioannis Tsinikos On improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production |
| description |
Abstract We introduce an improvement to the FxFx matrix element merging procedure for pp → t t ¯ W $$ t\overline{t}W $$ 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 t t ¯ W $$ t\overline{t}W $$ 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 t t ¯ W $$ t\overline{t}W $$ 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. |
| format |
article |
| author |
Rikkert Frederix Ioannis Tsinikos |
| author_facet |
Rikkert Frederix Ioannis Tsinikos |
| author_sort |
Rikkert Frederix |
| title |
On improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production |
| title_short |
On improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production |
| title_full |
On improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production |
| title_fullStr |
On improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production |
| title_full_unstemmed |
On improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production |
| title_sort |
on improving nlo merging for t t ¯ w $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{w} $$ production |
| publisher |
SpringerOpen |
| publishDate |
2021 |
| url |
https://doaj.org/article/89c3362bb95a4d59b2d83a30d8652d2e |
| work_keys_str_mv |
AT rikkertfrederix onimprovingnlomergingforttwmathrmtoverlinemathrmtmathrmwproduction AT ioannistsinikos onimprovingnlomergingforttwmathrmtoverlinemathrmtmathrmwproduction |
| _version_ |
1718442259987300352 |