Charged-particle multiplicity fluctuations in Pb–Pb collisions at √sNN = 2.76 TeV

ALICE Collaboration

doi:10.1140/epjc/s10052-021-09784-4

Charged-particle multiplicity fluctuations in Pb–Pb collisions at √sNN = 2.76 TeV

ALICE Collaboration

Chair of Experimentalphysik - Dense and Strange Hadronic Matter

European Organization for Nuclear Research
VECC Kolkata
Nuclear Physics Institute of the Cas
Johann Wolfgang Goethe University
Lund University
INFN Sez. di Torino
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
Aligarh Muslim University
Korea Institute of Science and Technology Information
P. J. Safarik University
Indonesian Institute of Sciences
ITEP
GSI Helmholtz Center
Fudan University
National Research Centre "Kurchatov Institute"
Central China Normal University
Universidad Nacional Autónoma de México
COMSATS University Islamabad
University of Houston
University of Bergen
University of St. Petersburg
Horia Hulubei National Institute of Physics and Nuclear Engineering
Science Park 105
University of Münster
Heidelberg University
Dipartimento di Fisica 'G. Galilei' and INFN
Lawrence Berkeley National Laboratory
l'institut du thorax
University of Oslo
Yale University
Institut de Physique Nucléaire
Laboratori Nazionali Del Sud
Gangneung-Wonju National University
University of Science and Technology of China
Indian Institute of Technology Indore
University of Jammu
Université Paris-Saclay Centre d’ Études de Saclay (CEA)
Univ of Mining and Metallurgy
University of Bonn
Bose Institute
Technical University of Munich
University of Athens
Wigner Research Centre for Physics
STFC Daresbury Laboratory
LAIC, Université d'Auvergne
University of Liverpool
Joint Inst. for Nuclear Research
The Indian Institute of Technology Bombay
Pontifical Catholic University of Peru San Miguel
Niels Bohr Institutet
Universite de Strasbourg
National Research Nuclear University MEPhI
Instituto de Ciencias Nucleares de la UNAM
Petersburg Nuclear Phys. Inst.
Institute of Space Sciences
Gauhati University
Sezione INFN di Cagliari
INFN, Laboratori Nazionali Di Frascati
Czech Technical University in Prague
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
University of Texas at Austin
University of Pavia
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
Oak Ridge National Laboratory
Inha University
University of Brescia
Moscow Institute of Physics and Technology
University of São Paulo
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
Politecnico di Bari
Russian Federal Nuclear Center (VNIIEF)
Stefan Meyer Institut für Subatomare Physik (SMI)
National Research Foundation
University of the Witwatersrand, Johannesburg
Universidad Autonoma de Sinaloa
Benemerita Universidad Autonoma de Puebla
INFN- Sezione di Trieste
Homi Bhabha National Institute
University of Lyon
University of Campinas
Tsukuba University
Energy and Sustainable Economic Development (ENEA)
University of Cape Town
University of Birmingham
Politecnico di Torino
University of Grenoble Alpes
University of Eastern Piedmont
UFABC
Sezione INFN di Roma La Sapienza
Frankfurt Institute for Advanced Studies
Warsaw Institute of Technology
University of California at Berkeley
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
Institute for Nuclear Research of the Russian Academy of Sciences
Panjab University
Comenius University
University of Zagreb
Institute for High Energy Physics (IHEP)
Chicago State University
National Nuclear Research Center
University of Kansas
UFRGS
Nagasaki Institute of Applied Science
Wayne State University
University of Split
the University of Utrecht
A.I. Alikhanyan National Science Laboratory (YerPhi)
University of Tokyo
Western Norway University of Applied Sciences
CINVESTAV
Yonsei University
Creighton University
University of Tennessee
Ohio State University
Technical University of Košice
Suranaree University of Technology
Institute of Experimental Physics Slovak Academy of Sciences
KTO Karatay University
Hochschule Worms
Pusan National University
University of Jyväskylä
Chonbuk National University
Sejong University
California Polytechnic State University, San Luis Obispo
National Center for Nuclear Research (NCBJ)
University of South-Eastern Norway
China Institute of Atomic Energy
Moscow State University
Multimedia and Distributed Systems Laboratory
Institute of Physics of the Czech Academy of Sciences
University of Foggia
Dipartimento di Fisica
Chungbuk National University
Hiroshima University
Budker Institute of Nuclear Physics (SB RAS)
University of Rajasthan
University of Helsinki and Helsinki Institute of Physics
Wrocław University
University of Tübingen
Nara Women's University
Bogolyubov Institute for Theoretical Physics Nasu

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7 Scopus citations

Abstract

Measurements of event-by-event fluctuations of charged-particle multiplicities in Pb–Pb collisions at sNN = 2.76 TeV using the ALICE detector at the CERN Large Hadron Collider (LHC) are presented in the pseudorapidity range | η| < 0.8 and transverse momentum 0.2 < p_T< 2.0 GeV/c. The amplitude of the fluctuations is expressed in terms of the variance normalized by the mean of the multiplicity distribution. The η and p_T dependences of the fluctuations and their evolution with respect to collision centrality are investigated. The multiplicity fluctuations tend to decrease from peripheral to central collisions. The results are compared to those obtained from HIJING and AMPT Monte Carlo event generators as well as to experimental data at lower collision energies. Additionally, the measured multiplicity fluctuations are discussed in the context of the isothermal compressibility of the high-density strongly-interacting system formed in central Pb–Pb collisions.

Original language	English
Article number	1012
Journal	European Physical Journal C
Volume	81
Issue number	11
DOIs	https://doi.org/10.1140/epjc/s10052-021-09784-4
State	Published - Nov 2021

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10.1140/epjc/s10052-021-09784-4

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@article{771566c45e8043d5b03098df438ea6a3,

title = "Charged-particle multiplicity fluctuations in Pb–Pb collisions at √sNN = 2.76 TeV",

abstract = "Measurements of event-by-event fluctuations of charged-particle multiplicities in Pb–Pb collisions at sNN = 2.76 TeV using the ALICE detector at the CERN Large Hadron Collider (LHC) are presented in the pseudorapidity range | η| < 0.8 and transverse momentum 0.2 < pT< 2.0 GeV/c. The amplitude of the fluctuations is expressed in terms of the variance normalized by the mean of the multiplicity distribution. The η and pT dependences of the fluctuations and their evolution with respect to collision centrality are investigated. The multiplicity fluctuations tend to decrease from peripheral to central collisions. The results are compared to those obtained from HIJING and AMPT Monte Carlo event generators as well as to experimental data at lower collision energies. Additionally, the measured multiplicity fluctuations are discussed in the context of the isothermal compressibility of the high-density strongly-interacting system formed in central Pb–Pb collisions.",

author = "\{ALICE Collaboration\} and S. Acharya and D. Adamov{\'a} and A. Adler and J. Adolfsson and \{Aglieri Rinella\}, G. and M. Agnello and N. Agrawal and Z. Ahammed and S. Ahmad and Ahn, \{S. U.\} and I. Ahuja and Z. Akbar and A. Akindinov and M. Al-Turany and Alam, \{S. N.\} and D. Aleksandrov and B. Alessandro and Alfanda, \{H. M.\} and \{Alfaro Molina\}, R. and B. Ali and Y. Ali and A. Alici and N. Alizadehvandchali and A. Alkin and J. Alme and T. Alt and L. Altenkamper and I. Altsybeev and Anaam, \{M. N.\} and C. Andrei and D. Andreou and A. Andronic and M. Angeletti and V. Anguelov and F. Antinori and P. Antonioli and C. Anuj and N. Apadula and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and R. Arnaldi and Arsene, \{I. C.\} and M. Arslandok and A. Augustinus and R. Averbeck and S. Aziz and Azmi, \{M. D.\} and A. Badal{\`a} and L. Fabbietti",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

month = nov,

doi = "10.1140/epjc/s10052-021-09784-4",

language = "English",

volume = "81",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "11",

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TY - JOUR

T1 - Charged-particle multiplicity fluctuations in Pb–Pb collisions at √sNN = 2.76 TeV

AU - ALICE Collaboration

AU - Acharya, S.

AU - Adamová, D.

AU - Adler, A.

AU - Adolfsson, J.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, S.

AU - Ahn, S. U.

AU - Ahuja, I.

AU - Akbar, Z.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, S. N.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfanda, H. M.

AU - Alfaro Molina, R.

AU - Ali, B.

AU - Ali, Y.

AU - Alici, A.

AU - Alizadehvandchali, N.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altenkamper, L.

AU - Altsybeev, I.

AU - Anaam, M. N.

AU - Andrei, C.

AU - Andreou, D.

AU - Andronic, A.

AU - Angeletti, M.

AU - Anguelov, V.

AU - Antinori, F.

AU - Antonioli, P.

AU - Anuj, C.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Aziz, S.

AU - Azmi, M. D.

AU - Badalà, A.

AU - Fabbietti, L.

PY - 2021/11

Y1 - 2021/11

N2 - Measurements of event-by-event fluctuations of charged-particle multiplicities in Pb–Pb collisions at sNN = 2.76 TeV using the ALICE detector at the CERN Large Hadron Collider (LHC) are presented in the pseudorapidity range | η| < 0.8 and transverse momentum 0.2 < pT< 2.0 GeV/c. The amplitude of the fluctuations is expressed in terms of the variance normalized by the mean of the multiplicity distribution. The η and pT dependences of the fluctuations and their evolution with respect to collision centrality are investigated. The multiplicity fluctuations tend to decrease from peripheral to central collisions. The results are compared to those obtained from HIJING and AMPT Monte Carlo event generators as well as to experimental data at lower collision energies. Additionally, the measured multiplicity fluctuations are discussed in the context of the isothermal compressibility of the high-density strongly-interacting system formed in central Pb–Pb collisions.

AB - Measurements of event-by-event fluctuations of charged-particle multiplicities in Pb–Pb collisions at sNN = 2.76 TeV using the ALICE detector at the CERN Large Hadron Collider (LHC) are presented in the pseudorapidity range | η| < 0.8 and transverse momentum 0.2 < pT< 2.0 GeV/c. The amplitude of the fluctuations is expressed in terms of the variance normalized by the mean of the multiplicity distribution. The η and pT dependences of the fluctuations and their evolution with respect to collision centrality are investigated. The multiplicity fluctuations tend to decrease from peripheral to central collisions. The results are compared to those obtained from HIJING and AMPT Monte Carlo event generators as well as to experimental data at lower collision energies. Additionally, the measured multiplicity fluctuations are discussed in the context of the isothermal compressibility of the high-density strongly-interacting system formed in central Pb–Pb collisions.

UR - https://www.scopus.com/pages/publications/85119598956

U2 - 10.1140/epjc/s10052-021-09784-4

DO - 10.1140/epjc/s10052-021-09784-4

M3 - Article

AN - SCOPUS:85119598956

SN - 1434-6044

VL - 81

JO - European Physical Journal C

JF - European Physical Journal C

IS - 11

M1 - 1012

ER -

Charged-particle multiplicity fluctuations in Pb–Pb collisions at √sNN = 2.76 TeV

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