articlePhysical Review LettersDec 13, 2010LVHYBRID OA

Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at s NN = 2.76     TeV with the ATLAS Detector at the LHC

University of Freiburg · University of Oklahoma · +229 more institutions

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Abstract

By using the ATLAS detector, observations have been made of a centrality-dependent dijet asymmetry in the collisions of lead ions at the Large Hadron Collider. In a sample of lead-lead events with a per-nucleon center of mass energy of 2.76 TeV, selected with a minimum bias trigger, jets are reconstructed in fine-grained, longitudinally segmented electromagnetic and hadronic calorimeters. The transverse energies of dijets in opposite hemispheres are observed to become systematically more unbalanced with increasing event centrality leading to a large number of events which contain highly asymmetric dijets. This is the first observation of an enhancement of events with such large dijet asymmetries, not observed…

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Topics & keywords

Keywords
  • Physics
  • Centrality
  • Asymmetry
  • Particle physics
  • Combinatorics
  • Mathematics
UN Sustainable Development Goals
  • Affordable and clean energy
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