Speaker
Description
This talk presents a comprehensive overview of recent ATLAS measurements of collective flow phenomena in a variety of collision systems. Measurements of the mean, variance, and skewness of the distribution of event-by-event per- particle average transverse momentum, [pT] are reported for Pb+Pb collisions at 5.02 TeV and Xe+Xe collisions at 5.44 TeV. These measurements give insight into the nature of the spatial energy fluctuations in the QGP produced in heavy- ion collisions. Measurements of the azimuthal anisotropy of high-pT particles in Pb+Pb collisions, using two and four-particle cumulants are presented. The high-pT vn measurements provide information on the path-length dependence of parton energy loss in the QGP. Two sets of measurements that investigate if the presence of jets affects the flow-like behavior observed in pp collisions are also presented.
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