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Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at √sNN = 5.02 TeV (CROSBI ID 246330)

Prilog u časopisu | Pismo (znanstveno) | međunarodna recenzija

(ALICE Collaboration) Adam, J. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... et al. Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at √sNN = 5.02 TeV // Physics letters. B, 772 (2017), 567-577. doi: 10.1016/j.physletb.2017.07.017

Podaci o odgovornosti

Adam, J. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Utrobičić, Antonija ; ... ; Vicković, Linda ; ... ; Zmeskal, J.

ALICE Collaboration

engleski

Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at √sNN = 5.02 TeV

We present the charged-particle pseudorapidity density in Pb-Pb collisions at √sNN=5.02TeV in centrality classes measured by ALICE. The measurement covers a wide pseudorapidity range from −3.5 to 5, which is sufficient for reliable estimates of the total number of charged particles produced in the collisions. For the most central (0-5%) collisions we find 21400±1300 while for the most peripheral (80- 90%) we find 230±38. This corresponds to an increase of (27±4) over the results at √sNN =2.76TeV previously reported by ALICE. The energy dependence of the total number of charged particles produced in heavy-ion collisions is found to obey a modified power- law like behaviour. The charged-particle pseudorapidity density of the most central collisions is compared to model calculations -- - none of which fully describes the measured distribution. We also present an estimate of the rapidity density of charged particles. The width of that distribution is found to exhibit a remarkable proportionality to the beam rapidity, independent of the collision energy from the top SPS to LHC energies.

centrality, pseudorapidity, Pb-Pb

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Podaci o izdanju

772

2017.

567-577

objavljeno

0370-2693

1873-2445

10.1016/j.physletb.2017.07.017

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Fizika

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