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)

Chair of Experimentalphysik - Dense and Strange Hadronic Matter

Czech Technical University in Prague
Academy of Sciences of the Czech Republic
Panjab University
European Organization for Nuclear Research
INFN Sez. di Torino
The Indian Institute of Technology Bombay
VECC Kolkata
Aligarh Muslim University
Korea Institute of Science and Technology Information
Yale University
ITEP
University of Campinas
National Research Centre "Kurchatov Institute"
University of Birmingham
Universidad Nacional Autónoma de México
Centro Fermi
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
Bogolyubov Institute for Theoretical Physics Nasu
University of Bergen
Bergen University College
Frankfurt Institute for Advanced Studies
University of St. Petersburg
University of São Paulo
Central China Normal University
Horia Hulubei National Institute of Physics and Nuclear Engineering
GSI Helmholtz Center
Heidelberg University
Creighton University
Rudjer Boskovic Institute
Dipartimento di Fisica 'G. Galilei' and INFN
University of Houston
l'institut du thorax
Johann Wolfgang Goethe University
Cluster of Excellence E-conversion
Technical University of Munich
University of Oslo
Laboratori Nazionali Del Sud
Konkuk University
University of Jammu
University Paris-Sud
Institute of Physics Bhubaneswar
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
Hungarian Academy of Sciences
LAIC, Université d'Auvergne
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
University of Münster
Joint Inst. for Nuclear Research
Niels Bohr Institutet
Inha University
Universite de Strasbourg
Benemerita Universidad Autonoma de Puebla
Universidad Autonoma de Sinaloa
National Research Nuclear University MEPhI
Petersburg Nuclear Phys. Inst.
the University of Utrecht
University of Tennessee
Gauhati University
INFN, Laboratori Nazionali Di Frascati
Wayne State University
Bose Institute
University of Texas at Austin
Lawrence Berkeley National Laboratory
P. J. Safarik University
Pusan National University
University of Liverpool
Purdue University
University of Helsinki and Helsinki Institute of Physics
Russian Federal Nuclear Center (VNIIEF)
Stefan Meyer Institut für Subatomare Physik (SMI)
Tsukuba University
National Research Foundation
COMSATS University Islamabad
Ohio State University
Technical University of Košice
Pontifical Catholic University of Peru San Miguel
INFN- Sezione di Trieste
Sezione INFN di Cagliari
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
University of Jyväskylä
Saha Institute of Nuclear Physics
Université Claude Bernard Lyon 1
Science Park 105
Lund University
University of Cape Town
Institute of Physics of the Slovak Academy of Sciences
University of Grenoble Alpes
Department of Physics
Oak Ridge National Laboratory
University of Eastern Piedmont
UFABC
CINVESTAV
Institute of Space Sciences
National Institute of Science Education and Research
Indian Institute of Technology Indore
Sezione INFN di Roma La Sapienza
National Center for Nuclear Research (NCBJ)
CIEMAT Energy Department
University of Zagreb
Institute for High Energy Physics (IHEP)
Universidad de Santiago de Compostela
Institute for Nuclear Research of the Russian Academy of Sciences
National and Kapodistrian University of Athens
Chicago State University
UFRGS
University of Split
Warsaw Institute of Technology
A.I. Alikhanyan National Science Laboratory (YerPhi)
University of Tokyo
Nagasaki Institute of Applied Science
University of 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
Moscow State University
University of the Witwatersrand, Johannesburg
Dipartimento di Fisica
Comenius University
Rheinische Friedrich-Wilhelms-Universität Bonn
Hiroshima University
University of Brescia
Budker Institute of Nuclear Physics (SB RAS)
University of Rajasthan
Laboratori Nazionali di Legnaro
Indonesian Institute of Sciences

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

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@article{0b9a9c19c1fd4638918bdb1b4c5ff3c3,

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 L. Fabbietti",

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",

publisher = "American Physical Society",

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 - Fabbietti, L.

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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