Flow harmonics in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV with the ATLAS detector

We report on the measurement of the azimuthal anisotropy of charged particles produced in lead-lead collisions at $\sqrt{s_{NN}}=2.76$ TeV. The Fourier coefficients $\mathrm{v}_{n}$ of the azimuthal angle distribution are obtained using multi-particle cumulants. The results on the transverse momentum and centrality dependence of the elliptic flow ($\mathrm{v}_{2}$) obtained from two-, four-, six- and eight-particle cumulants are presented. Higher-order harmonics, $\mathrm{v}_{3}$ and $\mathrm{v}_{4}$, are also derived using two- and four-particle cumulants and shown as a function of centrality and transverse momentum. A reduction of contributions from correlations not related to the collective flow are discussed. Event-by-event fluctuations of the flow harmonics centrality are also presented as a function of transverse momentum and the collision.