2015/09/30 by G. Aad, ATLAS Collaboration, B. Abbott +98
Physics and Astronomy · #Boson #Electroweak interaction #Gluon #Higgs boson #High-Energy Particle Collisions Research #Invariant mass #Large Hadron Collider #Lepton #Muon #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Standard Model (mathematical formulation) #hep-ex
paper · pdf · doi:10.1016/j.physletb.2015.12.048
published as Physics Letters B 753 (2016) 552-572 · 20 pages plus author list + cover pages (37 pages total), 5 figures, 6 tables, submitted to Physics Letters B, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2014-15/
openalex publication_date 2015/12/18 · arxiv created 2016/01/12 · arxiv updated 2016/01/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/08
The four-lepton (4 ℓ , 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 4 ℓ events are produced in the decays of resonant Z and Higgs bosons and the non-resonant ZZ continuum originating from q q ¯ , 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 q q ¯ 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 μ g g = 2.4 ± 1.0 ( stat. ) ± 0.5 ( syst. ) ± 0.8 ( theory ) .