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

Kallweit, Stefan; Wiesemann, Marius

doi:10.1016/j.physletb.2018.10.016

Article
Report number	arXiv:1806.05941 ; CERN-TH-2018-127
Title	$ZZ$ production at the LHC: NNLO predictions for $2\ell2\nu$ and $4\ell$ signatures
Author(s)	Kallweit, Stefan (CERN) ; Wiesemann, Marius (CERN)
Publication	2018-11-10
Imprint	2018-06-15
Number of pages	8
Note	14 pages, 6 figures, 2 tables
In:	Phys. Lett. B 786 (2018) 382-389
DOI	10.1016/j.physletb.2018.10.016 (publication)
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Abstract	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.
Copyright/License	publication: (License: CC-BY-4.0) preprint: (License: arXiv nonexclusive-distrib 1.0) The Authors

$Born-level Feynman diagrams for the production of two charged leptons and two neutrinos: (a-b) topologies of \zz{} production contributing to the process $pp\to\ell^+\ell^-\,\nu_{\ell'}\bar\nu_{\ell'}$ ($\elle\neq\elle^\prime$); (c-e) topologies of \ww{} production contributing to the process $pp\to\ell^+\nu_{\ell}\,\ell'^-\bar\nu_{\ell'}$ ($\elle\neq\elle^\prime$); for $\elle = \elle^\prime$ all diagrams contribute to the process $pp\to\ell^+\ell^-\,\nu_{\ell}\bar\nu_{\ell}$, thereby mixing \zz{} and \ww{} topologies.$ $Born-level Feynman diagrams for \zz{} production with four charged final-state leptons.$ $Born-level Feynman diagrams for the production of two charged leptons and two neutrinos: (a-b) topologies of \zz{} production contributing to the process $pp\to\ell^+\ell^-\,\nu_{\ell'}\bar\nu_{\ell'}$ ($\elle\neq\elle^\prime$); (c-e) topologies of \ww{} production contributing to the process $pp\to\ell^+\nu_{\ell}\,\ell'^-\bar\nu_{\ell'}$ ($\elle\neq\elle^\prime$); for $\elle = \elle^\prime$ all diagrams contribute to the process $pp\to\ell^+\ell^-\,\nu_{\ell}\bar\nu_{\ell}$, thereby mixing \zz{} and \ww{} topologies.$ Show more plots

Corresponding record in: Inspire

Back to search

Записът е създаден на 2018-06-19, последна промяна на 2021-07-16

Подобни записи

Article from SCOAP3:

PDF

Пълен текст:

PDF

Добавяне в личната кошница
Export as BibTeX, MARC, MARCXML, DC, EndNote, NLM, RefWorks

CERN Document Server

Access articles, reports and multimedia content in HEP

Main menu

CERN Accelerating science