| Issue |
EPJ Web Conf.
Volume 364, 2026
XXXI International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions “Quark Matter 2025”
|
|
|---|---|---|
| Article Number | 05005 | |
| Number of page(s) | 4 | |
| Section | Correlations & Fluctuations | |
| DOI | https://doi.org/10.1051/epjconf/202636405005 | |
| Published online | 17 April 2026 | |
https://doi.org/10.1051/epjconf/202636405005
Evidence for the collective nature of radial flow in Pb+Pb collisions with the ATLAS detector
Stony Brook University, Stony Brook NY, USA
* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 17 April 2026
Abstract
In heavy-ion collisions, the isotropic radial expansion of the formed Quark-Gluon Plasma (QGP) has been studied using its influence on other experimental observables. This proceeding summarizes the first direct evidence for the collective nature of radial flow fluctuations, using a transverse momentum (pT) differential observable, v0(pT), measured in Pb+Pb collisions at √sNN = 5.02TeV by the ATLAS Collaboration [1]. The measurement reveals three key signatures of the collective behavior of radial flow: factorization, longrange pseudorapidity correlations, and a centrality-independent shape. Comparisons with hydrodynamic model calculations show that v0(pT) is highly sensitive to the bulk viscosity of the QGP.
© The Authors, published by EDP Sciences, 2026
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