Flow Dominance and Factorization of Transverse Momentum Correlations in Pb-Pb Collisions at the LHC

(ALICE Collaboration)

doi:10.1103/PhysRevLett.118.162302

Flow Dominance and Factorization of Transverse Momentum Correlations in Pb-Pb Collisions at the LHC

(ALICE Collaboration)

Sección de Física

Faculty of Nuclear Sciences and Physical Engineering
Academy of Sciences of the Czech Republic
Panjab University
CERN
Sezione INFN
Indian Institute of Technology Bombay
Variable Energy Cyclotron Centre
Department of Physics Aligarh Muslim University
Korea Institute of Science and Technology Information
Yale University
Alikhanov Institute for Theoretical and Experimental Physics
Universidade Estadual de Campinas
Russian Research Centre Kurchatov Institute
University of Birmingham
Universidad Nacional Autónoma de México
Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi
National Institute for Nuclear Physics
Bogolyubov Institute for Theoretical Physics Nasu
University of Bergen
Western Norway University of Applied Sciences
Frankfurt Institute for Advanced Studies
St. Petersburg State University
Universidade de São Paulo
Central China Normal University
National Institute for Physics and Nuclear Engineering
GSI Helmholtzzentrum für Schwerionenforschung
Ruprecht-Karls-Universität Heidelberg
Creighton University
Ruder Boskovic Institute
University of Houston
Nantes Université
Goethe University Frankfurt
Technische Universität München
Technical University of Munich
University of Oslo
Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN
Konkuk University
University of Jammu
CNRS-IN2P3
Institute of Physics Bhubaneswar
Hungarian Academy of Sciences
Université Clermont Auvergne
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
University of Münster
Joint Institute for Nuclear Research
University of Copenhagen
Inha University
Université de Strasbourg
Benemérita Universidad Autónoma de Puebla
Universidad Autonoma de Sinaloa
Moscow Engineering Physics Institute
Petersburg Nuclear Physics Institute (PNPI)
Institute for Subatomic Physics of Utrecht University
University of Tennessee
Gauhati University
INFN, Laboratori Nazionali Di Frascati
Wayne State University
Bose Institute
University of Texas at Austin
Lawrence Berkeley National Laboratory
Pavol Jozef Šafárik University
Pusan National University
University of Liverpool
Purdue University
University of Helsinki
Russian Federal Nuclear Center (VNIIEF)
Austrian Academy of Sciences
University of Tsukuba
National Research Foundation
COMSATS University Islamabad
Ohio State University
Technical University of Košice
Pontifical Catholic Univ. of Peru
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
University of Jyväskylä
Saha Institute of Nuclear Physics
Universite Claude Bernard Lyon 1
National Institute for Subatomic Physics
University of Lund
University of Cape Town
Slovak Academy of Sciences
Université Grenoble Alpes
Georgia State University
Oak Ridge National Laboratory
Università del Piemonte Orientale and Gruppo Collegato INFN
Universidade Federal do ABC
Centro de Investigación y de Estudios AVanzados (CINVESTAV)
Institute of Space Science (ISS)
National Institute of Science Education and Research
Indian Institute of Technology Indore
National Centre for Nuclear Studies
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT)
University of Zagreb
Institute for High Energy Physics
Universidad de Santiago de Compostela
RAS - Institute for Nuclear Research
National and Kapodistrian University of Athens
Chicago State University
Universidade Federal do Rio Grande do Sul
University of Split
Warsaw University of Technology
A. Alikhanian Yerevan Institute of Physics
Tokyo University
Nagasaki Institute of Applied Science
Eberhard Karls Universität Tübingen
Institute of Physics of the Czech Academy of Sciences
Sejong University
Yonsei University
KTO Karatay University
Fachhochschule Worms
Gangneung-Wonju National University
California Polytechnic State University, San Luis Obispo
Suranaree University of Technology
University of South-Eastern Norway
STFC Daresbury Laboratory
China Institute of Atomic Energy
M.V.Lomonosov Moscow State University
University of the Witwatersrand
University of Rome La Sapienza
Comenius University
Rheinische Friedrich-Wilhelms-Universität Bonn
Hiroshima University
Università di Brescia
Budker Institute for Nuclear Physics
University of Rajasthan
Laboratori Nazionali di Legnaro
Indonesian Institute of Sciences
Centre de calcul de l'IN2P3

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

16 Scopus citations

Abstract

We present the first measurement of the two-particle transverse momentum differential correlation function, P2≡ ΔpTΔpT/ pT2, in Pb-Pb collisions at sNN=2.76 TeV. Results for P2 are reported as a function of the relative pseudorapidity (Δη) and azimuthal angle (Δφ) between two particles for different collision centralities. The Δφ dependence is found to be largely independent of Δη for |Δη|≥0.9. In the 5% most central Pb-Pb collisions, the two-particle transverse momentum correlation function exhibits a clear double-hump structure around Δφ=π (i.e., on the away side), which is not observed in number correlations in the same centrality range, and thus provides an indication of the dominance of triangular flow in this collision centrality. Fourier decompositions of P2, studied as a function of the collision centrality, show that correlations at |Δη|≥0.9 can be well reproduced by a flow ansatz based on the notion that measured transverse momentum correlations are strictly determined by the collective motion of the system.

Original language	English
Article number	162302
Journal	Physical Review Letters
Volume	118
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.118.162302
State	Published - 21 Apr 2017

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10.1103/PhysRevLett.118.162302

Cite this

@article{577ea4617dac47d99782aed3bed25412,

title = "Flow Dominance and Factorization of Transverse Momentum Correlations in Pb-Pb Collisions at the LHC",

abstract = "We present the first measurement of the two-particle transverse momentum differential correlation function, P2≡ ΔpTΔpT/ pT2, in Pb-Pb collisions at sNN=2.76 TeV. Results for P2 are reported as a function of the relative pseudorapidity (Δη) and azimuthal angle (Δφ) between two particles for different collision centralities. The Δφ dependence is found to be largely independent of Δη for |Δη|≥0.9. In the 5\% most central Pb-Pb collisions, the two-particle transverse momentum correlation function exhibits a clear double-hump structure around Δφ=π (i.e., on the away side), which is not observed in number correlations in the same centrality range, and thus provides an indication of the dominance of triangular flow in this collision centrality. Fourier decompositions of P2, studied as a function of the collision centrality, show that correlations at |Δη|≥0.9 can be well reproduced by a flow ansatz based on the notion that measured transverse momentum correlations are strictly determined by the collective motion of the system.",

author = "\{(ALICE Collaboration)\} and J. Adam and D. Adamov{\'a} and Aggarwal, \{M. M.\} and \{Aglieri Rinella\}, G. and M. Agnello and N. Agrawal and Z. Ahammed and S. Ahmad and Ahn, \{S. U.\} and S. Aiola and A. Akindinov and Alam, \{S. N.\} and Albuquerque, \{D. S.D.\} and D. Aleksandrov and B. Alessandro and D. Alexandre and \{Alfaro Molina\}, R. and A. Alici and A. Alkin and J. Alme and T. Alt and S. Altinpinar and I. Altsybeev and \{Alves Garcia Prado\}, C. and M. An and C. Andrei and Andrews, \{H. A.\} and A. Andronic and V. Anguelov and C. Anson and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli and R. Anwar and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and R. Arnaldi and Arnold, \{O. W.\} and Arsene, \{I. C.\} and M. Arslandok and B. Audurier and A. Augustinus and R. Averbeck and Azmi, \{M. D.\} and A. Badal{\`a} and Baek, \{Y. W.\} and S. Bagnasco and R. Bailhache and Gago, \{A. M.\}",

note = "Publisher Copyright: {\textcopyright} 2017 CERN, for the ALICE Collaboration.",

year = "2017",

month = apr,

day = "21",

doi = "10.1103/PhysRevLett.118.162302",

language = "English",

volume = "118",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "16",

}

TY - JOUR

T1 - Flow Dominance and Factorization of Transverse Momentum Correlations in Pb-Pb Collisions at the LHC

AU - (ALICE Collaboration)

AU - Adam, J.

AU - Adamová, D.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, S.

AU - Ahn, S. U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, S. N.

AU - Albuquerque, D. S.D.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alexandre, D.

AU - Alfaro Molina, R.

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altinpinar, S.

AU - Altsybeev, I.

AU - Alves Garcia Prado, C.

AU - An, M.

AU - Andrei, C.

AU - Andrews, H. A.

AU - Andronic, A.

AU - Anguelov, V.

AU - Anson, C.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Anwar, R.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arnold, O. W.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Audurier, B.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Badalà, A.

AU - Baek, Y. W.

AU - Bagnasco, S.

AU - Bailhache, R.

AU - Gago, A. M.

PY - 2017/4/21

Y1 - 2017/4/21

N2 - We present the first measurement of the two-particle transverse momentum differential correlation function, P2≡ ΔpTΔpT/ pT2, in Pb-Pb collisions at sNN=2.76 TeV. Results for P2 are reported as a function of the relative pseudorapidity (Δη) and azimuthal angle (Δφ) between two particles for different collision centralities. The Δφ dependence is found to be largely independent of Δη for |Δη|≥0.9. In the 5% most central Pb-Pb collisions, the two-particle transverse momentum correlation function exhibits a clear double-hump structure around Δφ=π (i.e., on the away side), which is not observed in number correlations in the same centrality range, and thus provides an indication of the dominance of triangular flow in this collision centrality. Fourier decompositions of P2, studied as a function of the collision centrality, show that correlations at |Δη|≥0.9 can be well reproduced by a flow ansatz based on the notion that measured transverse momentum correlations are strictly determined by the collective motion of the system.

AB - We present the first measurement of the two-particle transverse momentum differential correlation function, P2≡ ΔpTΔpT/ pT2, in Pb-Pb collisions at sNN=2.76 TeV. Results for P2 are reported as a function of the relative pseudorapidity (Δη) and azimuthal angle (Δφ) between two particles for different collision centralities. The Δφ dependence is found to be largely independent of Δη for |Δη|≥0.9. In the 5% most central Pb-Pb collisions, the two-particle transverse momentum correlation function exhibits a clear double-hump structure around Δφ=π (i.e., on the away side), which is not observed in number correlations in the same centrality range, and thus provides an indication of the dominance of triangular flow in this collision centrality. Fourier decompositions of P2, studied as a function of the collision centrality, show that correlations at |Δη|≥0.9 can be well reproduced by a flow ansatz based on the notion that measured transverse momentum correlations are strictly determined by the collective motion of the system.

UR - https://www.scopus.com/pages/publications/85018468686

U2 - 10.1103/PhysRevLett.118.162302

DO - 10.1103/PhysRevLett.118.162302

M3 - Article

C2 - 28474923

AN - SCOPUS:85018468686

SN - 0031-9007

VL - 118

JO - Physical Review Letters

JF - Physical Review Letters

IS - 16

M1 - 162302

ER -

Flow Dominance and Factorization of Transverse Momentum Correlations in Pb-Pb Collisions at the LHC

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