Measurement of the Azimuthal Anisotropy of Charged Particle Production in Xe+Xe Collisions at $\sqrt{s_{NN}}$=5.44 TeV with the ATLAS Detector

ATLAS measurements of flow harmonics ($v_{n}$) in Xe+Xe collisions are presented. The measurements are performed using two-particle correlations, multi-particle cumulants and scalar product methods. The measurements are also performed using non-flow subtraction techniques -- recently developed for measurements in proton-nucleus and proton-proton collisions -- to improve the understanding of flow in peripheral collisions. The non-flow removal is shown to have a significant impact on the $v_n$ measurements in peripheral events. By comparing to flow measurements in Pb+Pb collisions, the effects of geometric fluctuations and of viscous effects, both of which are stronger in the smaller Xe+Xe system, are demonstrated.