Jet Quenching in Relativistic Heavy Ion Collisions at the LHC

Understand

Jet production in relativistic heavy ion collisions is studied using Pb+Pb collisions at a center of mass energy of 2.76 TeV per nucleon.

• The measurements reported here utilize data collected with the ATLAS detector at the LHC from the 2010 Pb ion run corresponding to a total integrated luminosity of 7 inverse microbarns.
• The results are obtained using fully reconstructed jets using the anti-kt algorithm with a per-event background subtraction procedure.
• A centrality-dependent modification of the dijet asymmetry distribution is observed, which indicates a higher rate of asymmetric dijet pairs in central collisions relative to peripheral and pp collisions.