NLO QCD+EW predictions for tHj and tZj production at the LHC
Abstract In this work we calculate the cross sections for the hadroproduction of a single top quark or antiquark in association with a Higgs (tHj) or Z boson (tZj) at NLO QCD+EW accuracy. In the case of tZj production we consider both the case of the Z boson undecayed and the complete final state tℓ...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-08-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP08(2020)082 |
| _version_ | 1818048583608303616 |
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| author | Davide Pagani Ioannis Tsinikos Eleni Vryonidou |
| author_facet | Davide Pagani Ioannis Tsinikos Eleni Vryonidou |
| author_sort | Davide Pagani |
| collection | DOAJ |
| description | Abstract In this work we calculate the cross sections for the hadroproduction of a single top quark or antiquark in association with a Higgs (tHj) or Z boson (tZj) at NLO QCD+EW accuracy. In the case of tZj production we consider both the case of the Z boson undecayed and the complete final state tℓ + ℓ − j, including off-shell and non-resonant effects. We perform our calculation in the five-flavour-scheme (5FS), without selecting any specific production channel (s-, t- or tW associated). Moreover, we provide a more realistic estimate of the theory uncertainty by carefully including the differences between the four-flavour-scheme (4FS) and 5FS predictions. The difficulties underlying this procedure in the presence of EW corrections are discussed in detail. We find that NLO EW corrections are in general within the NLO QCD theory uncertainties only if the flavour scheme uncertainty (4FS vs. 5FS) is taken into account. For the case of tℓ + ℓ − j production we also investigate differences between NLO QCD+EW predictions and NLO QCD predictions matched with a parton shower simulation including multiple photon emissions. |
| first_indexed | 2024-12-10T10:24:00Z |
| format | Article |
| id | doaj.art-f787ed6a2acd4436963c7a964b96ca3c |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-10T10:24:00Z |
| publishDate | 2020-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-f787ed6a2acd4436963c7a964b96ca3c2022-12-22T01:52:46ZengSpringerOpenJournal of High Energy Physics1029-84792020-08-012020813310.1007/JHEP08(2020)082NLO QCD+EW predictions for tHj and tZj production at the LHCDavide Pagani0Ioannis Tsinikos1Eleni Vryonidou2Theory Group, DESYTheoretical Particle Physics, Department of Astronomy and Theoretical Physics, Lund UniversityTheoretical Physics Department, CERNAbstract In this work we calculate the cross sections for the hadroproduction of a single top quark or antiquark in association with a Higgs (tHj) or Z boson (tZj) at NLO QCD+EW accuracy. In the case of tZj production we consider both the case of the Z boson undecayed and the complete final state tℓ + ℓ − j, including off-shell and non-resonant effects. We perform our calculation in the five-flavour-scheme (5FS), without selecting any specific production channel (s-, t- or tW associated). Moreover, we provide a more realistic estimate of the theory uncertainty by carefully including the differences between the four-flavour-scheme (4FS) and 5FS predictions. The difficulties underlying this procedure in the presence of EW corrections are discussed in detail. We find that NLO EW corrections are in general within the NLO QCD theory uncertainties only if the flavour scheme uncertainty (4FS vs. 5FS) is taken into account. For the case of tℓ + ℓ − j production we also investigate differences between NLO QCD+EW predictions and NLO QCD predictions matched with a parton shower simulation including multiple photon emissions.http://link.springer.com/article/10.1007/JHEP08(2020)082NLO ComputationsQCD Phenomenology |
| spellingShingle | Davide Pagani Ioannis Tsinikos Eleni Vryonidou NLO QCD+EW predictions for tHj and tZj production at the LHC Journal of High Energy Physics NLO Computations QCD Phenomenology |
| title | NLO QCD+EW predictions for tHj and tZj production at the LHC |
| title_full | NLO QCD+EW predictions for tHj and tZj production at the LHC |
| title_fullStr | NLO QCD+EW predictions for tHj and tZj production at the LHC |
| title_full_unstemmed | NLO QCD+EW predictions for tHj and tZj production at the LHC |
| title_short | NLO QCD+EW predictions for tHj and tZj production at the LHC |
| title_sort | nlo qcd ew predictions for thj and tzj production at the lhc |
| topic | NLO Computations QCD Phenomenology |
| url | http://link.springer.com/article/10.1007/JHEP08(2020)082 |
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