2018/08/31 by M. Aaboud, ATLAS Collaboration, G. Aad +98
Physics and Astronomy · #Boson #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Muon #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Standard Model (mathematical formulation) #hep-ex
paper · pdf · doi:10.1016/j.physletb.2018.09.048
published as Phys. Lett. B 786 (2018) 223 · 38 pages in total, author list starting page 22, 3 figures, 3 tables, submitted to Phys. Lett. B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2017-06/
openalex publication_date 2018/09/26 · openalex created_date 2018/09/27 · arxiv created 2018/10/10 · arxiv updated 2018/10/11 · openalex updated_date 2026/08/06
A measurement of off-shell Higgs boson production in the Z Z → 4 ℓ and Z Z → 2 ℓ 2 ν decay channels, where ℓ stands for either an electron or a muon, is performed using data from proton–proton collisions at a centre-of-mass energy of s = 13 TeV. The data were collected by the ATLAS experiment in 2015 and 2016 at the Large Hadron Collider, and they correspond to an integrated luminosity of 36.1 fb − 1 . An observed (expected) upper limit on the off-shell Higgs signal strength, defined as the event yield normalised to the Standard Model prediction, of 3.8 (3.4) is obtained at 95% confidence level (CL). Assuming the ratio of the Higgs boson couplings to the Standard Model predictions is independent of the momentum transfer of the Higgs production mechanism considered in the analysis, a combination with the on-shell signal-strength measurements yields an observed (expected) 95% CL upper limit on the Higgs boson total width of 14.4 (15.2) MeV.