Evidence for the Collective Nature of Radial Flow in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>Pb</mml:mi> <mml:mo>+</mml:mo> <mml:mi>Pb</mml:mi> </mml:mrow> </mml:math> Collisions with the ATLAS De

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, direct experimental evidence for the global and collective nature of radial flow fluctuations has been lacking. This Letter presents the first measurement of transverse momentum (p_{T}) dependence of radial flow fluctuations (v_{0}(p_{T})) over 0.5<p_{T}<10 GeV and demonstrates its collective nature using a two-particle correlation method in Pb+Pb collisions at sqrt[s_{NN}]=5.02 TeV. The data reveal three key features supporting the collective nature of radial flow: long-range correlation in pseudorapidity, factorization in p_{T}, and centrality-independent shape in p_{T}. The comparison with a hydrodynamic model demonstrates the sensitivity of v_{0}(p_{T}) to bulk viscosity, a crucial transport property of the QGP. These findings establish a new, powerful tool for probing collective dynamics and properties of the QGP.

Authors

Institutions

Publication Details

Journal
Physical Review Letters
Published
2025-11-14
DOI
https://doi.org/10.1103/ldcn-r2lq
Citations
1
Primary Topic
High-Energy Particle Collisions Research
Type
article
Field-Weighted Citation Impact
1.87

Funders

Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
article

Evidence for the Collective Nature of Radial Flow in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>Pb</mml:mi> <mml:mo>+</mml:mo> <mml:mi>Pb</mml:mi> </mml:mrow> </mml:math> Collisions with the ATLAS De

Karl J. Friston
1 citations
Physical Review Letters
High-Energy Particle Collisions Research
1.87
article

Evidence for the Collective Nature of Radial Flow in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>Pb</mml:mi> <mml:mo>+</mml:mo> <mml:mi>Pb</mml:mi> </mml:mrow> </mml:math> Collisions with the ATLAS De

Karl J. Friston
article en
1 citations

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, direct experimental evidence for the global and collective nature of radial flow fluctuations has been lacking. This Letter presents the first measurement of transverse momentum (p_{T}) dependence of radial flow fluctuations (v_{0}(p_{T})) over 0.5<p_{T}<10 GeV and demonstrates its collective nature using a two-particle correlation method in Pb+Pb collisions at sqrt[s_{NN}]=5.02 TeV. The data reveal three key features supporting the collective nature of radial flow: long-range correlation in pseudorapidity, factorization in p_{T}, and centrality-independent shape in p_{T}. The comparison with a hydrodynamic model demonstrates the sensitivity of v_{0}(p_{T}) to bulk viscosity, a crucial transport property of the QGP. These findings establish a new, powerful tool for probing collective dynamics and properties of the QGP.

Physical Review LettersVol. 136(3)
Universidade Federal de Juiz de Fora (BR), Northern Illinois University (US), Tbilisi State University (GE), University of Pisa (IT), University of Geneva (CH), University of Rome Tor Vergata (IT), University of Bern (CH), Roma Tre University (IT), Tufts University (US), Universidade Federal do Rio de Janeiro (BR), Uppsala University (SE), University of Copenhagen (DK), Universidade Federal da Bahia (BR), University of Iowa (US), Mohammed V University (MA), University of Science and Technology of China (CN), Azerbaijan National Academy of Sciences (AZ), Jagiellonian University (PL), California State University System (US), Argonne National Laboratory (US), Rutherford Appleton Laboratory (GB), University of Udine (IT), The University of Sydney (AU), A. Alikhanyan National Laboratory (AM), TOBB University of Economics and Technology (TR), University of Bonn (DE), Kyushu University (JP), University of Arizona (US), Alexandru Ioan Cuza University (RO), High Energy Accelerator Research Organization (JP), Universidad Andrés Bello (CL), University of Bucharest (RO), University of Lisbon (PT), University of British Columbia (CA), University of Salento (IT), University of Tsukuba (JP), University of Liverpool (GB), Lawrence Berkeley National Laboratory (US), Ankara University (TR), Waseda University (JP), Consejo Nacional de Investigaciones Científicas y Técnicas (AR), University of Ljubljana (SI), Shandong University (CN), University of Alberta (CA), University of Cape Town (ZA), Sun Yat-sen University (CN), Universitat de València (ES), University of Freiburg (DE), Stockholm University (SE), Pontificia Universidad Católica de Chile (CL), University of Sussex (GB), Tel Aviv University (IL), The University of Melbourne (AU), Queen Mary University of London (GB), University of Wuppertal (DE), University of Pittsburgh (US), Duke University (US), Iowa State University (US), Technion – Israel Institute of Technology (IL), National Technical University of Athens (GR), Khalifa University of Science and Technology (AE), Chinese University of Hong Kong (HK), Southern Methodist University (US), Université Fédérale de Toulouse Midi-Pyrénées (FR), Universidade de São Paulo (BR), Simon Fraser University (CA), Shanghai Jiao Tong University (CN), Royal Holloway University of London (GB), University of Oslo (NO), University of California, Santa Cruz (US), University of Toronto (CA), University of Tarapacá (CL), Lund University (SE), University of Milan (IT), The University of Texas at Arlington (US), Universität Innsbruck (AT), York University (CA), University of the Witwatersrand (ZA), University of Trento (IT), Johannes Gutenberg University Mainz (DE), Chinese Academy of Sciences (CN), Université Clermont Auvergne (FR), Millennium Institute (BR), TU Dortmund University (DE), Justus-Liebig-Universität Gießen (DE), Hong Kong University of Science and Technology (HK), National and Kapodistrian University of Athens (GR), Brookhaven National Laboratory (US), University of Washington (US), United Arab Emirates University (AE), National Centre of Scientific Research "Demokritos" (GR), University of California, Irvine (US), Université Paris Cité (FR), University of Siegen (DE), Slovak Academy of Sciences (SK), University of Victoria (CA), Charles University (CZ), Aristotle University of Thessaloniki (GR), Aix-Marseille Université (FR), Kyoto University (JP), Heidelberg University (DE), University of Johannesburg (ZA), University of Cambridge (GB), Universidad de Buenos Aires (AR), University of Pavia (IT), National Tsing Hua University (TW), University of Würzburg (DE), Ochanomizu University (JP), Université Paris-Saclay (FR), University of Michigan (US), LIP - Laboratory of Instrumentation and Experimental Particle Physics (PT), Folkwang University of the Arts (DE), Harvard University Press (US), Deutsches Elektronen-Synchrotron DESY (DE), University of Illinois System (US), SLAC National Accelerator Laboratory (US), University of California System (US), University of Manchester (GB), University of Sharjah (AE), West University of Timişoara (RO), Université Ibn-Tofail (MA), Transylvania University of Brașov (RO), National University of Science and Technology (ZW), Yale University (US), Universidad Nacional de Colombia (CO), California University of Pennsylvania (US), Zhengzhou University (CN), Humboldt-Universität zu Berlin (DE), University of Warwick (GB), Sorbonne Université (FR), Universidade do Estado do Rio de Janeiro (BR), University of Oxford (GB), University of Chicago (US), University of Belgrade (RS), Shanghai Institute for Science of Science (CN), iThemba Laboratory (ZA), Max Planck Institute for Physics (DE), Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre (IT), Institute of Experimental Physics of the Slovak Academy of Sciences (SK), Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering (RO), Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications (IT), National Institute for Subatomic Physics (NL), University of West Attica (GR), Istituto Nazionale di Fisica Nucleare, Sezione di Lecce (IT), Universidad Antonio Nariño (CO), Institute of Nuclear Physics, Polish Academy of Sciences (PL), Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Pavia (IT), Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata (IT), The Polytechnic University of Japan (JP), Istinye University (TR), FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT), Université Mohammed VI Polytechnique (MA), Oklahoma State University Oklahoma City (US), Barcelona Institute of Science and Technology (ES), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (IT), Universidad Técnica Federico Santa María (EC), Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT), Centro Nacional de Microelectrónica (ES), National Institute for Research and Development of Isotopic and Molecular Technologies (RO), Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (IT), Istituto Nazionale di Fisica Nucleare, Sezione di Roma I (IT), Institut de Microelectrònica de Barcelona (ES), Istituto Nazionale di Fisica Nucleare, Sezione di Pisa (IT), Ōtani University (JP), University of Chinese Academy of Sciences (CN), Laboratoire Médiations (FR), Institute of Science and Technology, Institut des langues et cultures d'Europe, Amérique, Afrique, Asie et Australie (FR), Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Udine, Boğaziçi University (TR), University of Bergen (NO), Czech Technical University in Prague (CZ), University College London (GB), University of Calabria (IT), McGill University (CA), The Ohio State University (US), Weizmann Institute of Science (IL), The University of Adelaide (AU), New York University (US), Indiana University (US), Stony Brook University (US), Gaziantep University (TR), Nagoya University (JP), Universidad Autónoma de Madrid (ES), Kobe University (JP), Carleton University (CA), European Organization for Nuclear Research (CH), Lancaster University (GB), Istanbul University (TR), AGH University of Krakow (PL), Brandeis University (US), Tokyo Metropolitan University (JP), Palacký University Olomouc (CZ), Université Savoie Mont Blanc (FR), Université de Montréal (CA), University of Göttingen (DE), Comenius University Bratislava (SK), The University of Tokyo (JP), University of La Serena (CL), Premier University (BD), University of Coimbra (PT), Columbia University (US), Technische Universität Dresden (DE), University of Glasgow (GB), University of Birmingham (GB), Ludwig-Maximilians-Universität München (DE), University of Genoa (IT), Sapienza University of Rome (IT), The University of Texas at Austin (US), University of Oklahoma (US), KTH Royal Institute of Technology (SE), University of the Philippines Diliman (PH), Michigan State University (US), Universidad Nacional de La Plata (AR), Nanjing University (CN), University of Hong Kong (HK), Université Grenoble Alpes (FR), University of Sheffield (GB), Louisiana Tech University (US), University of Bologna (IT), University of Edinburgh (GB), Tsinghua University (CN), University of Hassan II Casablanca (MA), University of Minho (PT)
CERN
Openalex Percentile: Top 10%
High-Energy Particle Collisions Research
1.87
DOIOpen Access PDFOpenAlex
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.