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...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-11-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP11(2021)029 |
| _version_ | 1818724354554331136 |
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| author | Rikkert Frederix Ioannis Tsinikos |
| author_facet | Rikkert Frederix Ioannis Tsinikos |
| author_sort | Rikkert Frederix |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-17T21:25:05Z |
| format | Article |
| id | doaj.art-89c3362bb95a4d59b2d83a30d8652d2e |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-17T21:25:05Z |
| publishDate | 2021-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-89c3362bb95a4d59b2d83a30d8652d2e2022-12-21T21:32:04ZengSpringerOpenJournal of High Energy Physics1029-84792021-11-0120211112310.1007/JHEP11(2021)029On improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ productionRikkert Frederix0Ioannis Tsinikos1Department of Astronomy and Theoretical Physics, Lund UniversityDepartment of Astronomy and Theoretical Physics, Lund UniversityAbstract 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.https://doi.org/10.1007/JHEP11(2021)029NLO ComputationsQCD Phenomenology |
| spellingShingle | Rikkert Frederix Ioannis Tsinikos On improving NLO merging for t t ¯ W $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production Journal of High Energy Physics NLO Computations QCD Phenomenology |
| title | 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_short | 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 |
| topic | NLO Computations QCD Phenomenology |
| url | https://doi.org/10.1007/JHEP11(2021)029 |
| work_keys_str_mv | AT rikkertfrederix onimprovingnlomergingforttwmathrmtoverlinemathrmtmathrmwproduction AT ioannistsinikos onimprovingnlomergingforttwmathrmtoverlinemathrmtmathrmwproduction |