PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Heavy Ions
Measurement of collective dynamics in pp, Xe+Xe, and Pb+Pb collisions with the ATLAS detector
T. Bold*  on behalf of the ATLAS Collaboration
Full text: pdf
Pre-published on: November 12, 2022
Published on: June 15, 2023
Abstract
This report discusses ATLAS measurements of collective, flow phenomena in a variety of collision systems, including $pp$ collisions at 13 TeV, Xe+Xe collisions at 5.44 TeV, and Pb+Pb collisions at 5.02 TeV. These include measurements of
$v_n-[p_\mathrm{T}]$ correlations in Xe+Xe and Pb+Pb, which carry important information about the initial-state geometry of the Quark-Gluon Plasma and can potentially shed light on: any quadrupole deformation in the Xe nucleus; measurements of flow decorrelations differential in rapidity, which probe the longitudinal structure of the colliding system; and measurements of the sensitivity of collective behavior in $pp$ collisions to the presence of jets, which seek to distinguish the role that semi-hard processes play in the origin of these phenomena in small systems. These measurements furthermore provide stringent tests of the theoretical understanding of the initial state in heavy-ion collisions.
DOI: https://doi.org/10.22323/1.414.0483
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