2002/09/06 by Christian Schwanenberger
Physics and Astronomy · #hep-ex
published as Acta Phys.Polon. B33 (2002) 3153-3158 · 5 pages, talk given at 10th International Workshop on Deep Inelastic Scattering (DIS 2002), Cracow, May 2002, to appear in the proceedings
arxiv created 2002/09/06 · arxiv updated 2009/11/30
Three-jet production has been studied 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.