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Azimuthal angle correlations of charged hadrons were measured in $\sqrts_{NN}$ = 2.76 TeV PbPb collisions by the CMS experiment. The distributionsexhibit anisotropies that are correlated with the event-by-event orientation ofthe reaction plane. Several methods were employed to extract the strength ofthe signal: the event-plane, cumulant and Lee-Yang Zeros methods. These methodshave different sensitivity to correlations that are not caused by thecollective motion in the system (non-flow correlations due to jets, resonancedecays, and quantum correlations). The second Fourier coefficient of thecharged hadron azimuthal distributions was measured as a function of transversemomentum, pseudorapidity and centrality in a broad kinematic range: $0.3 < p_T< 12.0$ GeV/c, $|\eta| < 2.4$, as a function of collision centrality. Inaddition, the third through sixth Fourier components were measured atmidrapidity using selected methods.

Hydrodynamic Flow in PbPb Collisions Observed via Azimuthal Angle Correlations of Charged Hadrons