Higgs production in association with off-shell top-antitop pairs at NLO EW and QCD at the LHC
Please always quote using this URN: urn:nbn:de:bvb:20-opus-171871
- We present NLO electroweak corrections to Higgs production in association with off-shell top-antitop quark pairs. The full process pp → e +νeµ −ν¯µbb¯H is considered, and hence all interference, off-shell, and non-resonant contributions are taken into account. The electroweak corrections turn out to be below one per cent for the integrated cross section but can exceed 10% in certain phase-space regions. In addition to its phenomenological relevance, the computation constitutes a major technical achievement as the full NLO virtual correctionsWe present NLO electroweak corrections to Higgs production in association with off-shell top-antitop quark pairs. The full process pp → e +νeµ −ν¯µbb¯H is considered, and hence all interference, off-shell, and non-resonant contributions are taken into account. The electroweak corrections turn out to be below one per cent for the integrated cross section but can exceed 10% in certain phase-space regions. In addition to its phenomenological relevance, the computation constitutes a major technical achievement as the full NLO virtual corrections involving up to 9-point functions have been computed exactly. The results of the full computation are supported by two calculations in the double-pole approximation. These also allow to infer the effect of off-shell contributions and emphasise their importance especially for the run II of the LHC. Finally, we present combined predictions featuring both NLO electroweak and QCD corrections in a common set-up that will help the experimental collaborations in their quest of precisely measuring the aforementioned process.…
Author: | Ansgar Denner, Jean-Nicolas Lang, Mathieu Pellen, Sandro Uccirati |
---|---|
URN: | urn:nbn:de:bvb:20-opus-171871 |
Document Type: | Journal article |
Faculties: | Fakultät für Physik und Astronomie / Institut für Theoretische Physik und Astrophysik |
Language: | English |
Parent Title (English): | Journal of High Energy Physics |
Year of Completion: | 2017 |
Issue: | 2 |
Article Number: | 53 |
Source: | Journal of High Energy Physics (2017) 2:53. https://doi.org/10.1007/JHEP02(2017)053 |
DOI: | https://doi.org/10.1007/JHEP02(2017)053 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
Tag: | NLO computations; high energy physics |
Release Date: | 2021/02/03 |
EU-Project number / Contract (GA) number: | PITN-GA-2012-316704 |
OpenAIRE: | OpenAIRE |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |