2001/06/20 by H1 Collaboration, C. Adloff, V. Andreev +97 · 29 citations
Physics and Astronomy · #Cross section (physics) #Deep inelastic scattering #HERA #High-Energy Particle Collisions Research #Inelastic scattering #Jet (fluid) #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Phase space #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Range (aeronautics) #Scattering #hep-ex
paper · pdf · doi:10.1016/s0370-2693(01)00805-x
published in Physics Letters B 515(1-2), 17-29 (Elsevier BV) · 17 pages, 5 figures, 1 table
arxiv created 2001/06/20 · openalex publication_date 2001/08/01 · arxiv updated 2010/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Three-jet production is studied for the first time in deep-inelastic positron-proton scattering. The measurement carried out with the H1 detector at HERA covers a large range of four-momentum transfer squared 5 < Q2 < 5000 GeV2 and invariant three-jet masses 25 < M_(3jet) < 140 GeV. Jets are defined by the inclusive kT algorithm in the Breit frame. The size of the three-jet cross section and the ratio of the three-jet to the dijet cross section R_(3/2) are described over the whole phase space by the predictions of perturbative QCD in next-to-leading order. The shapes of angular jet distributions deviate significantly from a uniform population of the available phase space but are well described by the QCD calculation.