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

S Acharya; Jonatan Adolfsson; Sumit Basu; Peter Christiansen; Oliver Matonoha; Adrian Nassirpour; Alice Ohlson; Anders Oskarsson; Tuva Richert; Omar Vazquez Rueda; David Silvermyr; N Zurlo; ALICE Collaboration

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

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

S Acharya, Jonatan Adolfsson, Sumit Basu, Peter Christiansen, Oliver Matonoha, Adrian Nassirpour, Alice Ohlson, Anders Oskarsson, Tuva Richert, Omar Vazquez Rueda, David Silvermyr, N Zurlo, ALICE Collaboration

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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. © 2021, The Author(s).

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

Subject classification (UKÄ)

Subatomic Physics

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10.1140/epjc/s10052-021-09784-4Licence: CC BY

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Acharya, S., Adolfsson, J., Basu, S., Christiansen, P., Matonoha, O., Nassirpour, A., Ohlson, A., Oskarsson, A., Richert, T., Vazquez Rueda, O., Silvermyr, D., Zurlo, N., & ALICE Collaboration (2021). Charged-particle multiplicity fluctuations in Pb–Pb collisions at √sNN = 2.76 TeV. European Physical Journal C. Particles and Fields, 81(11), Article 1012. https://doi.org/10.1140/epjc/s10052-021-09784-4

@article{372213b3fe734d159dd4da01fa681d93,

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. {\textcopyright} 2021, The Author(s).",

author = "S Acharya and Jonatan Adolfsson and Sumit Basu and Peter Christiansen and Oliver Matonoha and Adrian Nassirpour and Alice Ohlson and Anders Oskarsson and Tuva Richert and {Vazquez Rueda}, Omar and David Silvermyr and N Zurlo and {ALICE Collaboration}",

year = "2021",

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

language = "English",

volume = "81",

journal = "European Physical Journal C. Particles and Fields",

issn = "1434-6052",

publisher = "Springer",

number = "11",

}

Acharya, S, Adolfsson, J, Basu, S , Christiansen, P , Matonoha, O , Nassirpour, A , Ohlson, A , Oskarsson, A, Richert, T, Vazquez Rueda, O, Silvermyr, D, Zurlo, N & ALICE Collaboration 2021, 'Charged-particle multiplicity fluctuations in Pb–Pb collisions at √sNN = 2.76 TeV', European Physical Journal C. Particles and Fields, vol. 81, no. 11, 1012. https://doi.org/10.1140/epjc/s10052-021-09784-4

TY - JOUR

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

AU - Acharya, S

AU - Adolfsson, Jonatan

AU - Basu, Sumit

AU - Christiansen, Peter

AU - Matonoha, Oliver

AU - Nassirpour, Adrian

AU - Ohlson, Alice

AU - Oskarsson, Anders

AU - Richert, Tuva

AU - Vazquez Rueda, Omar

AU - Silvermyr, David

AU - Zurlo, N

AU - ALICE Collaboration

PY - 2021

Y1 - 2021

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. © 2021, The Author(s).

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. © 2021, The Author(s).

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

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

M3 - Article

SN - 1434-6052

VL - 81

JO - European Physical Journal C. Particles and Fields

JF - European Physical Journal C. Particles and Fields

IS - 11

M1 - 1012

ER -

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

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