2018/06/15 by Stefan Kallweit, Marius Wiesemann
Physics and Astronomy · #Atlas (anatomy) #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Mixing (physics) #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum chromodynamics #Radiative transfer #hep-ex #hep-ph
paper · pdf · doi:10.1016/j.physletb.2018.10.016
14 pages, 6 figures, 2 tables
arxiv created 2018/06/15 · openalex created_date 2018/06/21 · openalex publication_date 2018/10/11 · arxiv updated 2018/10/17 · openalex updated_date 2026/08/05
We consider QCD radiative corrections to ZZ production for all experimentally relevant leptonic processes. We report on a novel computation of next-to-next-to-leading-order (NNLO) corrections to the diboson signature with two charged leptons and missing transverse energy (ℓℓ+ETmiss). All relevant final states are considered: ℓℓνℓνℓ, ℓℓνℓ′νℓ′ and ℓνℓℓ′νℓ′. We also study processes with four charged leptons: ℓℓℓℓ and ℓℓℓ′ℓ′. For the first time NNLO accuracy is achieved for a process mixing two double-resonant diboson topologies (ZZ/W+W−→ℓℓνℓνℓ). We find good agreement with ATLAS data at 8 TeV. NNLO corrections are large (5–20% and more), and interference effects between ZZ and W+W− resonances turn out to be negligible in most cases.