2019/02/28 by ATLAS Collaboration, M. Aaboud, G. Aad +98
Physics and Astronomy · #Boson #Electron #Gauge (firearms) #Hadron #Higgs boson #Invariant mass #Large Hadron Collider #Lepton #Luminosity #Neutrino Physics Research #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Standard Model (mathematical formulation) #hep-ex
paper · pdf · doi:10.1007/jhep04(2019)048
published as JHEP 04 (2019) 048 · 51 pages in total, author list starting page 35, 15 figures, 3 tables, submitted to JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-09
openalex created_date 2019/03/02 · openalex publication_date 2019/04/01 · arxiv created 2019/06/14 · arxiv updated 2019/06/17 · openalex updated_date 2026/08/06
A bstract A measurement of the four-lepton invariant mass spectrum is made with the ATLAS detector, using an integrated luminosity of 36.1 fb −1 of proton-proton collisions at √(s) <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 13 TeV delivered by the Large Hadron Collider. The differential cross-section is measured for events containing two same-flavour opposite-sign lepton pairs. It exhibits a rich structure, with different mass regions dominated in the Standard Model by single Z boson production, Higgs boson production, and Z boson pair production, and non-negligible interference effects at high invariant masses. The measurement is compared with state-of-the-art Standard Model calculations, which are found to be consistent with the data. These calculations are used to interpret the data in terms of gg → ZZ → 4 ℓ and Z → 4 ℓ subprocesses, and to place constraints on a possible contribution from physics beyond the Standard Model.