Recent Results on Flow and Correlations in Heavy Ion Collisions from the ATLAS Experiment

Measurements of soft particle production have provided valuable insight on properties of the Quark Gluon Plasma created in Pb+Pb collisions at the LHC. In particular, measurements of flow harmonics based on the azimuthal angle distributions of low-p_T particles probe the strongly coupled dense medium and test hydrodynamic model descriptions. Recently, the ATLAS experiment obtained results on flow harmonics and on the correlations between harmonics of different order, using charged particles produced in p+Pb and Pb+Pb collisions. Results were obtained with the two-particle correlation method and the multi-particle cumulants, both well suited to probe the collective dynamics of the system. Comparison of measurements in p+Pb and Pb+Pb collisions suggests the presence of collective flow in small systems such as p+Pb collisions.