Monte Carlo updates on color coherence at 7 TeV

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An important feature of quantum chromodynamics (QCD) is the effects of color coherence. Color coherence manifests as a color connection between the outgoing partons produced in hard interactions, leading to a suppression of particle radiation between the two leading jets of a three-jet event. The angular distribution of the third jet around the second jet was measured in ee+ and pp collisions. The latest result for the color coherence effect is from the Compact Muon Solenoid (CMS) experiment with a center-of-mass energy of 7 TeV. At the time, none of the Monte Carlo (MC) models was shown to be able to describe the data successfully. This study shows the results of the latest MC models describing the color coherence effect and compares them to the CMS 7 TeV data. The latest MC models are able to describe the CMS data much more satisfactorily.

Original languageEnglish
Pages (from-to)465-468
Number of pages4
JournalJournal of the Korean Physical Society
Issue number5
StatePublished - 1 Mar 2017


  • Color coherence
  • Fragmentation
  • Jet
  • QCD


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