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Three-jet events at the CERN intersecting storage rings

  • A. L.S. Angelis
  • , G. Basini
  • , H. J. Besch
  • , R. E. Breedon
  • , L. Camilleri
  • , T. J. Chapin
  • , R. L. Cool
  • , P. T. Cox
  • , C. Von Gagern
  • , C. Grosso-Pilcher
  • , D. S. Hanna
  • , B. M. Humphries
  • , J. T. Linnemann
  • , C. Newman-Holmes
  • , R. B. Nickerson
  • , N. Phinney
  • , B. G. Pope
  • , S. H. Pordes
  • , K. J. Powell
  • , R. W. Rusack
  • C. W. Salgado, A. M. Segar, S. R. Stampke, M. J. Tannenbaum, J. M. Yelton

Research output: Contribution to journal › Article › peer-review

Abstract

Three-jet events have been observed in pp collisions at s = 62.3 GeV. The data were collected using a total neutral energy trigger with a threshold at 25 GeV. These events appear predominantly as two jets, with some appearing as three jets. A novel analysis for the extraction of 2-jet and 3-jet events is described, and some of the event properties are discussed. The relative numbers of two- and three-jet events are studied within the framework of leading-order QCD, and yield a value of αs(K3/K2) = 0.19 ± 0.02 (stat.) ± 0.04 (syst.).

Original languageEnglish (US)
Pages (from-to)569-606
Number of pages38
JournalNuclear Physics, Section B
Volume303
Issue number4
DOIs
StatePublished - Jul 11 1988

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