Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN =5.02 TeV proton-lead collisions with the ATLAS detector

ATLAS Collaboration

doi:10.1103/PhysRevC.90.044906

Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s_NN =5.02 TeV proton-lead collisions with the ATLAS detector

ATLAS Collaboration

Physics

Aix-Marseille Université
University of Oklahoma
Academia Sinica - Institute of Physics
Université Paris-Saclay
Azerbaijan National Academy of Sciences
University of Amsterdam
Oklahoma State University
Michigan State University
University of Toronto
Tel Aviv University
Technion-Israel Institute of Technology
CERN
Stockholm University
Oskar Klein Centre
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London
AGH University of Science and Technology
Brookhaven National Laboratory
Yale University
Ludwig Maximilian University of Munich
Rutherford Appleton Laboratory
University of Belgrade
Laboratório de Instrumentação e Física Experimental de Partículas
University of Granada
University of Bern
Boston University
Joint Institute for Nuclear Research
University of Rome Tor Vergata
Lund University
The University of Tokyo
RAS - P.N. Lebedev Physics Institute
University of Bologna
University of Victoria BC
Université Grenoble Alpes
Consejo Nacional de Investigaciones Científicas y Técnicas
Horia Hulubei National Institute of Physics and Nuclear Engineering
University of Geneva
National Technical University of Athens
University of Udine
The University of Chicago
University of Birmingham
Lancaster University
University of Liverpool
University of Manchester
University of Naples Federico II
University of Copenhagen
Queen Mary University of London
Columbia University
High Energy Accelerator Research Organization, Tsukuba
Universidade Federal do Rio de Janeiro
Brandeis University
University of Michigan, Ann Arbor
University of Coimbra
University of Lisbon
University of Freiburg
University of Sheffield
Heidelberg University
University of Milan
National and Kapodistrian University of Athens
Technische Universität Dresden
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Moscow Engineering Physics Institute
Slovak Academy of Sciences
University of Oxford
SLAC National Accelerator Laboratory
Duke University
University of Montreal
German Electron Synchrotron
Bogazici University
Universidad Autónoma de Madrid
University of Cambridge
University of Bonn
Alikhanov Institute for Theoretical and Experimental Physics
Argonne National Laboratory
Comenius University
University of Illinois
University of Siegen
Czech Technical University in Prague
University of Johannesburg
TRIUMF
Roma Tre University
CEA-IRFU/CNRS/Université Paris Diderot
Aristotle University of Thessaloniki
University of Rome La Sapienza
CAS - Institute of High Energy Physics
Charles University
Cracow
University of Wisconsin-Madison
University of Wuppertal
Weizmann Institute of Science
University of Melbourne
University of Genoa
Max Planck Institute for Physics (Werner Heisenberg Institute)
Lawrence Berkeley National Laboratory
Université Savoie Mont Blanc
Harvard University
University of Sussex
University of Glasgow
University of California at Santa Cruz
California State University Fresno
CNRS/IN2P3
Tufts University
University of Pisa
University of Warwick
Gaziantep University
Stony Brook University
McGill University
Carleton University
University of Massachusetts
University of Hassan II Casablanca
York University Toronto
University of Regina
Humboldt University of Berlin
University College London
Louisiana Tech University
Royal Holloway University of London
Radboud University Nijmegen
University of Edinburgh
University of Pittsburgh
University of Göttingen
University of Sydney
University of Washington
Johannes Gutenberg University Mainz
Belarus Academy of Sciences
Czech Academy of Sciences
Lomonosov Moscow State University
Institute for High Energy Physics
Autonomous University of Barcelona
SUNY Albany
Université Clermont Auvergne
Mohamed I University
University of Texas at Arlington
Tokyo Metropolitan University
University of Oregon
University of Pennsylvania School of Arts and Sciences
Uppsala University
University of the Witwatersrand
Universidad Técnica Federico Santa Maria
Indiana University Bloomington
University of Bergen
Simon Fraser University
University of Oslo
Northern Illinois University
TU Dortmund University
University of Alberta
University of Valencia
Ankara University
Southern Methodist University
University of Calabria
Pontificia Universidad Católica de Chile
Universidade Federal de Juiz de Fora
Dogus University
Tomsk State University
Iowa State University
Shandong University
Nanjing University
Kobe University
Mohammed V University in Rabat
University of Arizona
Palacký University Olomouc
University of Ljubljana
University of Pavia
University of Naples Parthenope
Institute of Particle Physics
University of California at Irvine
New York University
Tbilisi State University
Universidade Federal de São João del-Rei
NOVA University Lisbon
Universidade de São Paulo
Justus Liebig University Giessen
Cadi Ayyad University
Osaka University
RAS - Saint Petersburg Nuclear Physics Institute
Peter the Great St. Petersburg Polytechnic University
University of British Columbia
Chinese University of Hong Kong
University of Innsbruck
Ohio State University
University of Iowa
University of Science and Technology of China
National Center for Energy, Nuclear Science and Technology
University of the Aegean
University of New Mexico
University of Salento
ICREA
A. Alikhanian Yerevan Institute of Physics
University of Cape Town
University of Tsukuba
Nagoya University
Shinshu University
Tokyo Institute of Technology
Waseda University
University of Texas at Austin
Kyoto University
University of Texas at Dallas
University of Adelaide
Ivane Javakhishvili Tbilisi State University
Ilia State University
KTH Royal Institute of Technology
Kyushu University
Ochanomizu University
Manhattan College
Shanghai Jiao Tong University
Universidad Antonio Nariño
National Institute of Science Education and Research
Hampton University
Moscow Institute of Physics and Technology
Hiroshima Institute of Technology
Okayama University
University of Minho
Universidad de Buenos Aires
Jagiellonian University in Kraków
International School for Advanced Studies
National Institute for Research and Development of Isotopic and Molecular Technologies
University of South Carolina
IN2P3 - Institut National de Physique Nucléaire et de Physique Des Particules
University of Würzburg
Sun Yat-Sen University
Nagasaki Institute of Applied Science
TOBB University of Economics and Technology
Kyoto University of Education
Ritsumeikan University
Massachusetts Institute of Technology
Wigner Research Centre for Physics
Turkish Atomic Energy Authority
University of Hamburg
University of KwaZulu-Natal
Belarusian State University
Gazi University
University of Malaya

Research output: Contribution to journal › Article › peer-review

172 Citations (Scopus)

Abstract

Measurements of two-particle correlation functions and the first five azimuthal harmonics, v¹ to v⁵, are presented, using 28 nb^-1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV measured with the ATLAS detector at the LHC. Significant long-range "ridgelike" correlations are observed for pairs with small (|Δϕ|<π/3) and back-to-back pairs (|Δφ|>2π/3) over the transverse momentum range 0.4<p_T<12 GeV and in different intervals of event activity. The event activity is defined by either the number of reconstructed tracks or the total transverse energy on the Pb-fragmentation side. The azimuthal structure of such long-range correlations is Fourier decomposed to obtain the harmonics ν_n as a function of pT and event activity. The extracted ν_n values for n=2 to 5 decrease with n. The ν₂ and ν₃ values are found to be positive in the measured pT range. The ν₁ is also measured as a function of pT and is observed to change sign around pT≈1.5-2.0 GeV and then increase to about 0.1 for pT>4 GeV. The ν₂ (pT), ν₃ (pT), and ν₄ (pT) are compared to the ν_n coefficients in Pb+Pb collisions at √sNN=2.76 TeV with similar event multiplicities. Reasonable agreement is observed after accounting for the difference in the average pT of particles produced in the two collision systems.

Original language	English
Article number	044906
Journal	Physical Review C - Nuclear Physics
Volume	90
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.90.044906
Publication status	Published - 9 Oct 2014

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.90.044906

Cite this

@article{2aced48d4f40455e8d344fee6306764c,

title = "Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN =5.02 TeV proton-lead collisions with the ATLAS detector",

abstract = "Measurements of two-particle correlation functions and the first five azimuthal harmonics, v1 to v5, are presented, using 28 nb-1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV measured with the ATLAS detector at the LHC. Significant long-range {"}ridgelike{"} correlations are observed for pairs with small (|Δϕ|<π/3) and back-to-back pairs (|Δφ|>2π/3) over the transverse momentum range 0.4T<12 GeV and in different intervals of event activity. The event activity is defined by either the number of reconstructed tracks or the total transverse energy on the Pb-fragmentation side. The azimuthal structure of such long-range correlations is Fourier decomposed to obtain the harmonics νn as a function of pT and event activity. The extracted νn values for n=2 to 5 decrease with n. The ν2 and ν3 values are found to be positive in the measured pT range. The ν1 is also measured as a function of pT and is observed to change sign around pT≈1.5-2.0 GeV and then increase to about 0.1 for pT>4 GeV. The ν2 (pT), ν3 (pT), and ν4 (pT) are compared to the νn coefficients in Pb+Pb collisions at √sNN=2.76 TeV with similar event multiplicities. Reasonable agreement is observed after accounting for the difference in the average pT of particles produced in the two collision systems.",

author = "\{ATLAS Collaboration\} and G. Aad and B. Abbott and J. Abdallah and \{Abdel Khalek\}, S. and O. Abdinov and R. Aben and B. Abi and M. Abolins and Abouzeid, \{O. S.\} and H. Abramowicz and H. Abreu and R. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and J. Adelman and S. Adomeit and T. Adye and T. Agatonovic-Jovin and Aguilar-Saavedra, \{J. A.\} and M. Agustoni and Ahlen, \{S. P.\} and F. Ahmadov and G. Aielli and H. Akerstedt and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and Alberghi, \{G. L.\} and J. Albert and S. Albrand and \{Alconada Verzini\}, \{M. J.\} and M. Aleksa and Aleksandrov, \{I. N.\} and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and G. Alimonti and L. Alio and J. Alison and Allbrooke, \{B. M.M.\} and Allison, \{L. J.\} and Allport, \{P. P.\} and J. Almond and A. Aloisio and A. Alonso and Connell, \{S. H.\}",

note = "Publisher Copyright: {\textcopyright} 2014 CERN, for the ATLAS Collaboration.",

year = "2014",

month = oct,

day = "9",

doi = "10.1103/PhysRevC.90.044906",

language = "English",

volume = "90",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

TY - JOUR

T1 - Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √sNN =5.02 TeV proton-lead collisions with the ATLAS detector

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.

AU - Abdinov, O.

AU - Aben, R.

AU - Abi, B.

AU - Abolins, M.

AU - Abouzeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abreu, R.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adye, T.

AU - Agatonovic-Jovin, T.

AU - Aguilar-Saavedra, J. A.

AU - Agustoni, M.

AU - Ahlen, S. P.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akerstedt, H.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albrand, S.

AU - Alconada Verzini, M. J.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Alimonti, G.

AU - Alio, L.

AU - Alison, J.

AU - Allbrooke, B. M.M.

AU - Allison, L. J.

AU - Allport, P. P.

AU - Almond, J.

AU - Aloisio, A.

AU - Alonso, A.

AU - Connell, S. H.

PY - 2014/10/9

Y1 - 2014/10/9

N2 - Measurements of two-particle correlation functions and the first five azimuthal harmonics, v1 to v5, are presented, using 28 nb-1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV measured with the ATLAS detector at the LHC. Significant long-range "ridgelike" correlations are observed for pairs with small (|Δϕ|<π/3) and back-to-back pairs (|Δφ|>2π/3) over the transverse momentum range 0.4T<12 GeV and in different intervals of event activity. The event activity is defined by either the number of reconstructed tracks or the total transverse energy on the Pb-fragmentation side. The azimuthal structure of such long-range correlations is Fourier decomposed to obtain the harmonics νn as a function of pT and event activity. The extracted νn values for n=2 to 5 decrease with n. The ν2 and ν3 values are found to be positive in the measured pT range. The ν1 is also measured as a function of pT and is observed to change sign around pT≈1.5-2.0 GeV and then increase to about 0.1 for pT>4 GeV. The ν2 (pT), ν3 (pT), and ν4 (pT) are compared to the νn coefficients in Pb+Pb collisions at √sNN=2.76 TeV with similar event multiplicities. Reasonable agreement is observed after accounting for the difference in the average pT of particles produced in the two collision systems.

AB - Measurements of two-particle correlation functions and the first five azimuthal harmonics, v1 to v5, are presented, using 28 nb-1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV measured with the ATLAS detector at the LHC. Significant long-range "ridgelike" correlations are observed for pairs with small (|Δϕ|<π/3) and back-to-back pairs (|Δφ|>2π/3) over the transverse momentum range 0.4T<12 GeV and in different intervals of event activity. The event activity is defined by either the number of reconstructed tracks or the total transverse energy on the Pb-fragmentation side. The azimuthal structure of such long-range correlations is Fourier decomposed to obtain the harmonics νn as a function of pT and event activity. The extracted νn values for n=2 to 5 decrease with n. The ν2 and ν3 values are found to be positive in the measured pT range. The ν1 is also measured as a function of pT and is observed to change sign around pT≈1.5-2.0 GeV and then increase to about 0.1 for pT>4 GeV. The ν2 (pT), ν3 (pT), and ν4 (pT) are compared to the νn coefficients in Pb+Pb collisions at √sNN=2.76 TeV with similar event multiplicities. Reasonable agreement is observed after accounting for the difference in the average pT of particles produced in the two collision systems.

UR - https://www.scopus.com/pages/publications/84908431471

U2 - 10.1103/PhysRevC.90.044906

DO - 10.1103/PhysRevC.90.044906

M3 - Article

AN - SCOPUS:84908431471

SN - 0556-2813

VL - 90

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 4

M1 - 044906

ER -

Measurement of long-range pseudorapidity correlations and azimuthal harmonics in √s_NN =5.02 TeV proton-lead collisions with the ATLAS detector

Abstract

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