2003/01/01 by The OPAL Collaboration, The OPAL collaboration, G. Abbiendi · 40 citations
Physics and Astronomy · #Annihilation #Boson #Electron #Electron–positron annihilation #Event (particle physics) #Hadron #High-Energy Particle Collisions Research #Lepton #Nuclear physics #Pair production #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #hep-ex
paper · pdf · doi:10.1140/epjc/s2003-01467-x
published in The European Physical Journal C 32(3), 303-322 (Springer Science+Business Media) · 34 pages, 10 figures, Submitted to Eur. Phys. J
openalex publication_date 2003/01/01 · arxiv created 2003/10/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A study of Z-boson pair production in e+e- annihilation at center-of-mass energies between 190 GeV and 209 GeV is reported. Final states containing only leptons, (l+l-l+l- and l+l-nn), quark and lepton pairs, (qql+l-, qqnn) and only hadrons (qqqq) are considered. In all states with at least one Z boson decaying hadronically, lifetime, lepton and event-shape tags are used to separate bb pairs from qq final state. Limits on anomalous ZZgamma and ZZZ couplings are derived from the measured cross sections and from event kinematics using an optimal observable method. Limits on low scale gravity with large dimensions are derived from the cross sections and their dependence on polar angle.