Main Image
Volume 321 - Sixth Annual Conference on Large Hadron Collider Physics (LHCP2018) - Parallel Heavy Ions
New results on soft particle production in heavy-ion collisions with ATLAS
A. Trzupek* on behalf of the ATLAS collaboration
*corresponding author
Full text: pdf
Pre-published on: 2018 October 04
Published on: 2018 December 21
The measurement of flow $v_2$-$v_5$ harmonics in Xe+Xe collisions at the energy of $\sqrt{s_{NN}}$ = 5.44~\TeV\ were recently performed in the ATLAS experiment at the LHC. Results on the $p_T$ and centrality dependence of $v_n$ harmonics are presented. A comparison of the measured $v_n$ to Pb+Pb results and theoretical predictions is shown. The data indicate stronger event-to-event fluctuations of $v_n$ harmonics in the Xe+Xe collision system as compared to Pb+Pb collisions. For Pb+Pb collisions at the energy of $\sqrt{s_{NN}}$ = 5.02 TeV, the modified Pearson's correlation coefficient for event-wise the mean transverse momentum and the square of the magnitude of flow harmonics is also. Significant, non-zero correlation coefficients for $v_2$, $v_3$ and $v_4$ harmonics are obtained. The coefficients weakly depend on the transverse momentum range of the selected particles. The coefficient for the second order harmonic is negative in peripheral events, has a significant positive value for mid-central events and drops in the most central collisions. Measured Pearson's coefficients are compared to model predictions.
Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.