Measurement of Jets and Jet Quenching in $oldmath sqrt{s_{mathrm{NN}}}=2.76$~TeV Lead-Lead Collisions with the ATLAS detector at the LHC

Measurement of Jets and Jet Quenching in $oldmath sqrt{s_{mathrm{NN}}}=2.76$~TeV Lead-Lead Collisions with the ATLAS detector at the LHC} author{Aaron Angerami$^dagger$ on behalf of the ATLAS Collaboration} address{$^dagger$Columbia University, Nevis Labs, Irvington, NY, 10533, USA} ead{angerami@cern.ch} egin{abstract} We present the first results of single jet observables in~PbPb collisions at $sqrt{s_{mathrm{NN}}}=2.76$~TeV measured with the ATLAS detector at the LHC. Full jets are reconstructed with anti-kt algorithm with $mathrm{R}= 0.2$ and $0.4$ and an event-by-event subtraction procedure to correct for the effects of the underlying event including elliptic flow. The measured nuclear modification factor,~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 modification of jet's internal structure and no significant reduction in the suppression when moving to the larger jet definition.