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Measurements of four-lepton production in pp collisions at √s=8 TeV with the ATLAS detector

Aad, G.
•
Abbott, B.
•
Abdallah, J.
altro
GIORDANI, Mario
2016
  • journal article

Periodico
PHYSICS LETTERS. SECTION B
Abstract
The four-lepton (4l, l=e, μ) production cross section is measured in the mass range from 80 to 1000 GeV using 20.3 fb-1 of data in pp collisions at s=8 TeV collected with the ATLAS detector at the LHC. The 4l events are produced in the decays of resonant Z and Higgs bosons and the non-resonant ZZ continuum originating from qq-, gg, and qg initial states. A total of 476 signal candidate events are observed with a background expectation of 26.2±3.6 events, enabling the measurement of the integrated cross section and the differential cross section as a function of the invariant mass and transverse momentum of the four-lepton system. In the mass range above 180 GeV, assuming the theoretical constraint on the qq- production cross section calculated with perturbative NNLO QCD and NLO electroweak corrections, the signal strength of the gluon-fusion component relative to its leading-order prediction is determined to be μgg=2.4±1.0 (stat.)±0.5 (syst.)±0.8 (theory)
DOI
10.1016/j.physletb.2015.12.048
WOS
WOS:000368783600077
Archivio
http://hdl.handle.net/11390/1109752
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85042561006
Diritti
metadata only access
Scopus© citazioni
25
Data di acquisizione
Jun 7, 2022
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Web of Science© citazioni
22
Data di acquisizione
Mar 23, 2024
Visualizzazioni
1
Data di acquisizione
Apr 19, 2024
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