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

Autori
Acharya, S. ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Karatović, David ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Vicković, Linda ; ... ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
The European Physical Journal C (1434-6044) 81 (2021), 11; 1012, 17

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
charged particle: multiplicity ; multiplicity: fluctuation ; heavy ion: scattering ; CERN LHC Coll ; Monte Carlo ; CERN Lab ; peripheral ; ALICE ; transverse momentum ; impact parameter ; rapidity ; experimental results ; 2760 GeV-cms/nucleon

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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