Measurement of the distributions of event-by-event flow harmonics in Pb-Pb Collisions at sqrt(snn)=2.76 TeV with the ATLAS detector
Abstract
The event-by-event distributions of harmonic flow coefficients vn for n=2-4 are measured in Pb-Pb collisions at sqrt(snn)=2.76 TeV with the ATLAS detector, using charged particles with pT > 0.5 GeV and |η|<2.5. The shape of the vn distributions is consistent with Gaussian fluctuations in central collisions for v2 and over the measured centrality range for v3 and v4. When these distributions are rescaled to have the same <vn>, the resulting shapes are nearly the same for pT>1 GeV and 0.5<pT<1 GeV. The vn distributions are compared with the eccentricity distributions from two initial geometry models: Glauber and the MC-KLN model. Both fail to describe the v2 data consistently over the full centrality range
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