Evidence for the collective nature of radial flow in Pb+Pb collisions with the ATLAS detector

2025/03/31 by ATLAS Collaboration · 6 citations
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex)

paper · doi:10.48550/arxiv.2503.24125

Abstract

Anisotropic flow and radial flow are two key probes of the expansion dynamics and properties of the quark-gluon plasma (QGP). While anisotropic flow has been extensively studied, radial flow, which governs the system's radial expansion, has received less attention. Notably, experimental evidence for the global and collective nature of radial flow has been lacking. This Letter presents the first measurement of transverse momentum (p_T) dependence of radial flow fluctuations (v₀(p_T)) over 0.5

Cited by

• Kinematic and dynamical origins of mean-p_T fluctuations in heavy-ion collisions
• Observation of partonic collectivity via p_{\rm T}-differential radial flow fluctuations in Au+Au collisions at √s_{\rm NN} = 200 GeV
• Observation of suppressed charged-particle production in ultrarelativistic oxygen-oxygen collisions
• Tracing pT-differential radial flow from blast-wave analytics to quark coalescence
• Few is different: deciphering many-body dynamics in mesoscopic quantum gases
• Characterizing radial flow fluctuations in relativistic heavy-ion collisions at top RHIC and LHC energies

Related

• Understanding radial flow fluctuations through event-by-event momentum rescaling
• Long-range transverse momentum correlations and radial flow in Pb-Pb collisions at the LHC with ALICE
• Transverse momentum decorrelation of the flow vector in Pb-Pb collisions at √s_{\rm NN} = 5.02 TeV
• Novel Probes of Quark-Gluon Plasma Evolution in Heavy-Ion Collisions With the ATLAS Detector: From Structure of Colliding Nuclei to Collective Expansion of Medium
• Onset of radial flow in p+p collisions