Azimuthal anisotropies of charged particles with high transverse momentum in Pb+Pb collisions at (Formula presented.) TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1103/d46f-yl4n

Azimuthal anisotropies of charged particles with high transverse momentum in Pb+Pb collisions at (Formula presented.) TeV with the ATLAS detector

ATLAS Collaboration

Instituto de Alta Investigación

Aix-Marseille Université and CNRS/IN2P3
University of Bergen
University of Oklahoma
New York University Abu Dhabi
CERN
School of Agriculture and Science
Department of Mechanical and Aeronautical Engineering
Departamento de Física Teórica y del Cosmos
University of Göttingen
TU Dortmund University
United States Department of Energy
Southern Methodist University
Mohammed V University in Rabat
Tel Aviv University
New York University
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London
Heidelberg University
IN2P3
AGH University of Krakow
SLAC National Accelerator Laboratory
University of Manchester
Northern Illinois University
Istanbul University
Rutherford Appleton Laboratory
University of California at Santa Cruz
The University of Chicago
Institute for High Energy Physics
Johannes Gutenberg University Mainz
Alexandru Ioan Cuza University of Iaşi
Azerbaijan National Academy of Sciences
Royal Holloway University of London
Zhengzhou University
University of Rome Tor Vergata
University of Valencia
University of Hassan II Casablanca
Lund University
Stony Brook University
Waseda University
University of Bonn
Bogazici University
University of Victoria BC
Université Grenoble Alpes
University of Edinburgh
Oklahoma State University
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
University of Geneva
University of Warwick
Czech Technical University in Prague
Lancaster University
Al-Imam Muhammad Ibn Saud Islamic University
The California State University
University of Liverpool
University of Johannesburg
Université Paris-Saclay
University of Sussex
University of Birmingham
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Universidad Nacional de La Plata
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McGill University
Ludwig Maximilian University of Munich
University of Michigan, Ann Arbor
University of Freiburg
University of Toronto
Laboratório de Instrumentação e Física Experimental de Partículas
Aristotle University of Thessaloniki
High Energy Accelerator Research Organization, Tsukuba
University of Oslo
University of Sheffield
University of Texas at Austin
University of Glasgow
University of Milan
National and Kapodistrian University of Athens
Columbia University
The University of Tokyo
German Electron Synchrotron
Brandeis University
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Duke University
University of Montreal
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United Arab Emirates University
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University of Genoa
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Max Planck Institute for Physics (Werner Heisenberg Institute)
Joint Laboratory of Optics
University of Science and Technology of China
University of Oxford
University College London
Universidad Autónoma de Madrid
CAS - Institute of High Energy Physics
An-Najah National University
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University of Innsbruck
Universidad de Buenos Aires
Sorbonne Université
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University of Bern
University of Fribourg
Istinye University
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Harvard University
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Charles University
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University of Trento
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Universidad Nacional de Colombia
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Argonne National Laboratory
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University of Wisconsin-Madison
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University of Ljubljana
University of Udine
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Demokritos National Centre for Scientific Research
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University of Alberta
The University of Georgia, Tbilisi
West University of Timisoara
Sun Yat-Sen University
Henan University
A. Alikhanian Yerevan Institute of Physics
Shinshu University
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The University of Osaka
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National University of Science and Technology POLITEHNICA Bucharest
Azerbaijan State University of Economics
Universidade de São Paulo
Universidad de La Serena
University of Pavia
Yeditepe University
Georgian Academy of Sciences E. Andronikashvili Institute of Physics
Ilia State University
Institute of Science Tokyo
Technion-Israel Institute of Technology
University of the Witwatersrand
Also at Center for Interdisciplinary Research and Innovation (CIRI-AUTH)
Iowa State University
Universidad Andrés Bello
Kobe University
University of the Western Cape
Hellenic Open University
Peking University
Hong Kong University of Science and Technology
University of South Africa
Stellenbosch University
University of Iowa
Institut national polytechnique de Toulouse
Kyushu University
California State University Sacramento
Mohamed I University
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Universidad Antonio Nariño
The University of Sydney
University of Hamburg
Transilvania University of Brasov
National Institute for Research and Development of Isotopic and Molecular Technologies
Universidad de Tarapacá
Bulgarian Academy of Sciences
Washington College
University of West Attica
TOBB University of Economics and Technology
Mongolian Academy of Sciences
Tokyo Metropolitan University
University of California at Berkeley

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

Resumen

A measurement is presented of elliptic (v₂) and triangular (v₃) azimuthal anisotropy coefficients for charged particles produced in Pb+Pb collisions at (Formula presented.) TeV using a dataset corresponding to an integrated luminosity of 0.44 nb⁻¹ collected with the ATLAS detector at the LHC in 2018. The values of v₂ and v₃ are measured for charged particles over a wide range of transverse momentum (p_T), 1–400 GeV, and Pb+Pb collision centrality, 0–60%, using the scalar-product and multiparticle cumulant methods. These methods are sensitive to event-by-event fluctuations and nonflow effects in the measurements of azimuthal anisotropies. Positive values of v₂ are observed up to a p_T of approximately 100 GeV from both methods across all centrality intervals. Positive values of v₃ are observed up to approximately 25 GeV using both methods, though the application of the three-subevent technique to the multiparticle cumulant method leads to significant changes at the highest pT. At high p_T (p_T ⪎ 10 GeV), charged particles are dominantly from jet fragmentation. These jets, and hence the measurements presented here, are sensitive to the path-length dependence of parton energy loss in the quark-gluon plasma produced in Pb+Pb collisions.

Idioma original	Inglés
Número de artículo	024910
Páginas (desde-hasta)	1-34
Número de páginas	34
Publicación	Physical Review C
Volumen	112
N.º	2
DOI	https://doi.org/10.1103/d46f-yl4n
Estado	Publicada - 27 ago 2025

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@article{e98245c437634811bb7a9e1b19298897,

title = "Azimuthal anisotropies of charged particles with high transverse momentum in Pb+Pb collisions at (Formula presented.) TeV with the ATLAS detector",

abstract = "A measurement is presented of elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients for charged particles produced in Pb+Pb collisions at (Formula presented.) TeV using a dataset corresponding to an integrated luminosity of 0.44 nb−1 collected with the ATLAS detector at the LHC in 2018. The values of v2 and v3 are measured for charged particles over a wide range of transverse momentum (pT), 1–400 GeV, and Pb+Pb collision centrality, 0–60\%, using the scalar-product and multiparticle cumulant methods. These methods are sensitive to event-by-event fluctuations and nonflow effects in the measurements of azimuthal anisotropies. Positive values of v2 are observed up to a pT of approximately 100 GeV from both methods across all centrality intervals. Positive values of v3 are observed up to approximately 25 GeV using both methods, though the application of the three-subevent technique to the multiparticle cumulant method leads to significant changes at the highest pT. At high pT (pT ⪎ 10 GeV), charged particles are dominantly from jet fragmentation. These jets, and hence the measurements presented here, are sensitive to the path-length dependence of parton energy loss in the quark-gluon plasma produced in Pb+Pb collisions.",

author = "G. Aad and E. Aakvaag and B. Abbott and S. Abdelhameed and S. Kabana and \{ATLAS Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2025 CERN, for the ATLAS Collaboration",

year = "2025",

month = aug,

day = "27",

doi = "10.1103/d46f-yl4n",

language = "English",

volume = "112",

pages = "1--34",

journal = "Physical Review C",

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T1 - Azimuthal anisotropies of charged particles with high transverse momentum in Pb+Pb collisions at (Formula presented.) TeV with the ATLAS detector

AU - Aad, G.

AU - Aakvaag, E.

AU - Abbott, B.

AU - Abdelhameed, S.

AU - Kabana, S.

AU - ATLAS Collaboration

PY - 2025/8/27

Y1 - 2025/8/27

N2 - A measurement is presented of elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients for charged particles produced in Pb+Pb collisions at (Formula presented.) TeV using a dataset corresponding to an integrated luminosity of 0.44 nb−1 collected with the ATLAS detector at the LHC in 2018. The values of v2 and v3 are measured for charged particles over a wide range of transverse momentum (pT), 1–400 GeV, and Pb+Pb collision centrality, 0–60%, using the scalar-product and multiparticle cumulant methods. These methods are sensitive to event-by-event fluctuations and nonflow effects in the measurements of azimuthal anisotropies. Positive values of v2 are observed up to a pT of approximately 100 GeV from both methods across all centrality intervals. Positive values of v3 are observed up to approximately 25 GeV using both methods, though the application of the three-subevent technique to the multiparticle cumulant method leads to significant changes at the highest pT. At high pT (pT ⪎ 10 GeV), charged particles are dominantly from jet fragmentation. These jets, and hence the measurements presented here, are sensitive to the path-length dependence of parton energy loss in the quark-gluon plasma produced in Pb+Pb collisions.

AB - A measurement is presented of elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients for charged particles produced in Pb+Pb collisions at (Formula presented.) TeV using a dataset corresponding to an integrated luminosity of 0.44 nb−1 collected with the ATLAS detector at the LHC in 2018. The values of v2 and v3 are measured for charged particles over a wide range of transverse momentum (pT), 1–400 GeV, and Pb+Pb collision centrality, 0–60%, using the scalar-product and multiparticle cumulant methods. These methods are sensitive to event-by-event fluctuations and nonflow effects in the measurements of azimuthal anisotropies. Positive values of v2 are observed up to a pT of approximately 100 GeV from both methods across all centrality intervals. Positive values of v3 are observed up to approximately 25 GeV using both methods, though the application of the three-subevent technique to the multiparticle cumulant method leads to significant changes at the highest pT. At high pT (pT ⪎ 10 GeV), charged particles are dominantly from jet fragmentation. These jets, and hence the measurements presented here, are sensitive to the path-length dependence of parton energy loss in the quark-gluon plasma produced in Pb+Pb collisions.

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Azimuthal anisotropies of charged particles with high transverse momentum in Pb+Pb collisions at (Formula presented.) TeV with the ATLAS detector

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