Abstract

The first results of single jet observables in Pb+Pb collisions at sNN = 2.76 TeV measured with the ATLAS detector at the LHC are presented. Full jets are reconstructed with the anti-kt algorithm with R = 0.2 and 0.4, using an event-by-event subtraction procedure to account for the contribution of the underlying event (including elliptic flow) to the reconstructed jet energy. The geometrically-scaled ratio of jet yields in central and peripheral events, RCP, indicates a clear suppression of jets with ET> 100 GeV. No significant change in the level of suppression is found when moving from R = 0.2 to R = 0.4.

Highlights

  • Full jets are reconstructed with the anti-kt algorithm with R = 0.2 and 0.4, using an event-by-event subtraction procedure to account for the contribution of the underlying event to the reconstructed jet energy

  • Energetic jets produced in high energy nuclear collisions serve as probes of the hot, dense medium created there by the phenomenon of “jet quenching” [1]

  • The published RHIC measurements have been limited to using single particles as a proxy for the entire jet, providing only indirect evidence for jet quenching

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Summary

The first results of single jet observables in

TeV measured with the ATLAS detector at the LHC are presented. Full jets are reconstructed with the anti-kt algorithm with R = 0.2 and 0.4, using an event-by-event subtraction procedure to account for the contribution of the underlying event (including elliptic flow) to the reconstructed jet energy. The geometrically-scaled ratio of jet yields in central and peripheral events, RCP, indicates a clear suppression of jets with ET > 100 GeV. No significant change in the level of suppression is found when moving from R = 0.2 to R = 0.4

INTRODUCTION
JET RECONSTRUCTION
RESULTS

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