Measurement of Jets and Jet Suppression in sqrt(s_NN)=2.76 TeV Lead-Lead Collisions with the ATLAS detector at the LHC

Abstract

The first results of single jet observables in Pb+Pb collisions at sqrt(s_NN)=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 correct for the effects of the underlying event including elliptic flow. The geometrically-scaled ratio of jet yields in central and peripheral events,Rcp, indicates a clear suppression of jets with ET >100 GeV. The transverse and longitudinal distributions of jet fragments is also presented. We find little no substantial change to the fragmentation properties and no significant change in the level of suppression when moving to the larger jet definition.

arXiv comment5 pages, 6 figures, proceedings for Quark Matter 2011, Annecy, France, May 23-28, 2011

References in corpus (4)

• The anti-k_t jet clustering algorithm
• Suppression of Hadrons with Large Transverse Momentum in Central Au+Au Collisions at $sqrt {s sub {sub {NN}}}_ = 130 GeV
• Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at sqrt(S(NN))= 2.76 TeV with the ATLAS Detector at the LHC
• Centrality dependence of high pT hadron suppression in Au+Au collisions at sqrt(sNN)=130 GeV

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• Jet fragmentation transverse momentum measurements from di-hadron correlations in $\sqrt{s}$ = 7 TeV pp and $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV p-Pb collisions
• Centrality dependence of charged particle spectra and RCP in Pb+Pb collisions at \sqrt{s_{NN}}=2.76TeV with the ATLAS detector at the LHC
• High-p_t in heavy ion collisions: an abridged theoretical overview
• Spectra and nuclear modification factor of charged hadrons produced in lead-lead collisions at sqrt(s_NN)=2.76TeV with the ATLAS detector at the LHC
• Jet transverse fragmentation momentum from h-h correlations in pp and p-Pb collisions