Azimuthal correlations in Pb--Pb and Xe--Xe collisions with ALICE

Measurements of two- and multiparticle azimuthal correlations provide valuable information on the properties of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Further input can be achieved using the event shape engineering (ESE) technique which allows to select events corresponding to a specific initial geometry in a given centrality class. The elliptic (v(2)) and triangular (v(3)) flow coefficients of inclusive charged hadrons, pi(+/-), K-+/-, p+(p) over bar, K-S(0), Lambda+(Lambda) over bar, and Xi-+(Xi) over bar (+) are measured with ESE in Pb-Pb collisions at root s(NN) = 5.02 TeV recorded by ALICE. In addition, the v(2) of pi(+/-), K-+/-, p+(p) over bar, K-S(0), and Lambda+(Lambda) over bar from Xe-Xe collisions at root s(NN) = 5.44 TeV is presented. The results obtained using the scalar product method are reported as a function of transverse momentum, ?T, within the pseudorapidity (rapidity) range vertical bar eta vertical bar < 0.8 (vertical bar y vertical bar < 0.5) for various centrality classes. The flow coefficients exhibit a particle mass dependence for p(T) < 3 GeV/c and a grouping according to particle type (i.e. mesons and baryons) for 3 < pT < 10 GeV/ 2. The v(2) of pi(+/-), K-+/-, and p+<(p)over bar> is described by MUSIC hydrodynamic calculations for p(T) < 1 GeV/c. The ratios between v(n) for shape selected and unbiased events show a weak dependence on transverse momentum for p(T) < 3 GeV/c and are almost flat at higher p(T), independent on particle species. These measurements provide new and independent constraints for the initial conditions and system properties of nuclear matter created in heavy-ion collisions.