10–17 Jul 2019
Ghent
Europe/Brussels timezone

Azimuthal anisotropy in Pb+Pb, Xe+Xe and p+Pb collisions and vn-pt correlations in Pb+Pb and p+Pb collisions with the ATLAS experiment

13 Jul 2019, 11:48
20m
ICC - Baekeland 3 (Ghent)

ICC - Baekeland 3

Ghent

Parallel talk Heavy Ion Physics Heavy Ion Physics

Speaker

Tomasz Bold (AGH Univ. of Science and Technology, Krakow)

Description

ATLAS measurements of differential and global Fourier harmonics of charged particles ($v_{n}$) in 5.02 TeV Pb+Pb and 5.44 TeV Xe+Xe collisions in a wide range of transverse momenta (up to 60 GeV), pseudorapidity (|$\eta$|<2.5) and collision centrality (0-80%) are presented. The higher order harmonics, sensitive to fluctuations in the initial state, are measured up to n=7 using the two-particle correlation, cumulant and scalar-product methods. The elliptic and triangular flow harmonics show an interesting universal $p_{T}$-scaling. The flow results allow to improve the understanding of initial conditions of nuclear collisions, hydrodynamical behavior of quark-gluon plasma and parton energy loss. The dynamic properties of the QGP can also be studied using a modified Pearson's correlation coefficient, $\rho(v_{n},p_{T})$, that quantifies correlation between the mean transverse momentum and the magnitude of the flow vector. The $\rho$ coefficient is presented for 5.02 TeV Pb+Pb and p+Pb collisions. Azimuthal anisotropy in Pb+Pb collisions is also compared with new measurements in pp and p+Pb collisions.

Primary author

Presentation materials