$ZZ$ production at the LHC: NNLO predictions for $2\ell2\nu$ and $4\ell$ signatures

We consider QCD radiative corrections to ZZ production for all experimentally relevant leptonic processes. We report on a novel computation of next-to-next-to-leading-order (NNLO) corrections to the diboson signature with two charged leptons and missing transverse energy ( ℓℓ+ETmiss ). All relevant...

Descripción completa

Detalles Bibliográficos
Autores principales: Kallweit, Stefan, Wiesemann, Marius
Lenguaje:eng
Publicado: 2018
Materias:
hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2018.10.016
http://cds.cern.ch/record/2624793
_version_ 1780958765360611328
author Kallweit, Stefan
Wiesemann, Marius
author_facet Kallweit, Stefan
Wiesemann, Marius
author_sort Kallweit, Stefan
collection CERN
description We consider QCD radiative corrections to ZZ production for all experimentally relevant leptonic processes. We report on a novel computation of next-to-next-to-leading-order (NNLO) corrections to the diboson signature with two charged leptons and missing transverse energy ( ℓℓ+ETmiss ). All relevant final states are considered: ℓℓνℓνℓ , ℓℓνℓ′νℓ′ and ℓνℓℓ′νℓ′ . We also study processes with four charged leptons: ℓℓℓℓ and ℓℓℓ′ℓ′ . For the first time NNLO accuracy is achieved for a process mixing two double-resonant diboson topologies ( ZZ/W+W−→ℓℓνℓνℓ ). We find good agreement with ATLAS data at 8 TeV. NNLO corrections are large (5–20% and more), and interference effects between ZZ and W+W− resonances turn out to be negligible in most cases.
id cern-2624793
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
record_format invenio
spelling cern-26247932021-07-16T01:07:38Zdoi:10.1016/j.physletb.2018.10.016http://cds.cern.ch/record/2624793engKallweit, StefanWiesemann, Marius$ZZ$ production at the LHC: NNLO predictions for $2\ell2\nu$ and $4\ell$ signatureshep-exParticle Physics - Experimenthep-phParticle Physics - PhenomenologyWe consider QCD radiative corrections to ZZ production for all experimentally relevant leptonic processes. We report on a novel computation of next-to-next-to-leading-order (NNLO) corrections to the diboson signature with two charged leptons and missing transverse energy ( ℓℓ+ETmiss ). All relevant final states are considered: ℓℓνℓνℓ , ℓℓνℓ′νℓ′ and ℓνℓℓ′νℓ′ . We also study processes with four charged leptons: ℓℓℓℓ and ℓℓℓ′ℓ′ . For the first time NNLO accuracy is achieved for a process mixing two double-resonant diboson topologies ( ZZ/W+W−→ℓℓνℓνℓ ). We find good agreement with ATLAS data at 8 TeV. NNLO corrections are large (5–20% and more), and interference effects between ZZ and W+W− resonances turn out to be negligible in most cases.We consider QCD radiative corrections to $ZZ$ production for all experimentally relevant leptonic processes. We report on a novel computation of next-to-next-to-leading-order (NNLO) corrections to the diboson signature with two charged leptons and missing transverse energy ($\ell\ell$+$E_T^{\rm miss}$). All relevant final states are considered: $\ell\ell\nu_\ell\nu_\ell$, $\ell\ell\nu_{\ell'}\nu_{\ell'}$ and $\ell\nu_{\ell}\ell'\nu_{\ell'}$. We also study processes with four charged leptons: $\ell\ell\ell\ell$ and $\ell\ell\ell'\ell'$. For the first time NNLO accuracy is achieved for a process mixing two double-resonant diboson topologies ($ZZ/W^+W^-\to\ell\ell\nu_\ell\nu_\ell$). We find good agreement with ATLAS data at 8 TeV. NNLO corrections are large (5-20% and more), and interference effects between $ZZ$ and $W^+W^-$ resonances turn out to be negligible in most cases.arXiv:1806.05941CERN-TH-2018-127oai:cds.cern.ch:26247932018-06-15
spellingShingle hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
Kallweit, Stefan
Wiesemann, Marius
$ZZ$ production at the LHC: NNLO predictions for $2\ell2\nu$ and $4\ell$ signatures
title $ZZ$ production at the LHC: NNLO predictions for $2\ell2\nu$ and $4\ell$ signatures
title_full $ZZ$ production at the LHC: NNLO predictions for $2\ell2\nu$ and $4\ell$ signatures
title_fullStr $ZZ$ production at the LHC: NNLO predictions for $2\ell2\nu$ and $4\ell$ signatures
title_full_unstemmed $ZZ$ production at the LHC: NNLO predictions for $2\ell2\nu$ and $4\ell$ signatures
title_short $ZZ$ production at the LHC: NNLO predictions for $2\ell2\nu$ and $4\ell$ signatures
title_sort $zz$ production at the lhc: nnlo predictions for $2\ell2\nu$ and $4\ell$ signatures
topic hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.physletb.2018.10.016
http://cds.cern.ch/record/2624793
work_keys_str_mv AT kallweitstefan zzproductionatthelhcnnlopredictionsfor2ell2nuand4ellsignatures
AT wiesemannmarius zzproductionatthelhcnnlopredictionsfor2ell2nuand4ellsignatures

Ejemplares similares