Matching N3LO QCD calculations to parton showers
Abstract The search for new interactions and particles in high-energy collider physics relies on precise background predictions. This has led to many advances in combining precise fixed-order cross-section calculations with detailed event generator simulations. In recent years, fixed-order qcd calcu...
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2021
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oai:doaj.org-article:b93de9999fea4ddba41e92d890426e722021-11-14T12:40:31ZMatching N3LO QCD calculations to parton showers10.1007/JHEP11(2021)0411029-8479https://doaj.org/article/b93de9999fea4ddba41e92d890426e722021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)041https://doaj.org/toc/1029-8479Abstract The search for new interactions and particles in high-energy collider physics relies on precise background predictions. This has led to many advances in combining precise fixed-order cross-section calculations with detailed event generator simulations. In recent years, fixed-order qcd calculations of inclusive cross sections at n3lo precision have emerged, followed by an impressive progress at producing differential results. Once differential results become publicly available, it would be prudent to embed these into event generators to allow the community to leverage these advances. This note offers some concrete thoughts on me+ps matching at third order in qcd. As a method for testing these thoughts, a toy calculation of e + e − → u u ¯ $$ \overline{u} $$ at O $$ \mathcal{O} $$ ( α s 3 $$ {\alpha}_s^3 $$ ) is constructed, and combined with an event generator through unitary matching. The toy implementation may serve also as blueprint for high-precision qcd predictions at future lepton colliders. As a byproduct of the n3lo matching formula, a new nnlo+ps formula for processes with “additional” jets is obtained.Stefan PrestelSpringerOpenarticlePerturbative QCDResummationNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-69 (2021) |
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DOAJ |
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DOAJ |
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Perturbative QCD Resummation Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 |
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Perturbative QCD Resummation Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Stefan Prestel Matching N3LO QCD calculations to parton showers |
| description |
Abstract The search for new interactions and particles in high-energy collider physics relies on precise background predictions. This has led to many advances in combining precise fixed-order cross-section calculations with detailed event generator simulations. In recent years, fixed-order qcd calculations of inclusive cross sections at n3lo precision have emerged, followed by an impressive progress at producing differential results. Once differential results become publicly available, it would be prudent to embed these into event generators to allow the community to leverage these advances. This note offers some concrete thoughts on me+ps matching at third order in qcd. As a method for testing these thoughts, a toy calculation of e + e − → u u ¯ $$ \overline{u} $$ at O $$ \mathcal{O} $$ ( α s 3 $$ {\alpha}_s^3 $$ ) is constructed, and combined with an event generator through unitary matching. The toy implementation may serve also as blueprint for high-precision qcd predictions at future lepton colliders. As a byproduct of the n3lo matching formula, a new nnlo+ps formula for processes with “additional” jets is obtained. |
| format |
article |
| author |
Stefan Prestel |
| author_facet |
Stefan Prestel |
| author_sort |
Stefan Prestel |
| title |
Matching N3LO QCD calculations to parton showers |
| title_short |
Matching N3LO QCD calculations to parton showers |
| title_full |
Matching N3LO QCD calculations to parton showers |
| title_fullStr |
Matching N3LO QCD calculations to parton showers |
| title_full_unstemmed |
Matching N3LO QCD calculations to parton showers |
| title_sort |
matching n3lo qcd calculations to parton showers |
| publisher |
SpringerOpen |
| publishDate |
2021 |
| url |
https://doaj.org/article/b93de9999fea4ddba41e92d890426e72 |
| work_keys_str_mv |
AT stefanprestel matchingn3loqcdcalculationstopartonshowers |
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1718429126355845120 |