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Event-by-event mean pT fluctuations in pp and Pb-Pb collisions at the LHC (CROSBI ID 210370)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

(ALICE Collaboration) Abelev, B. ... ; Antičić, Tome ; ... ; Gotovac, Sven ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola et al. Event-by-event mean pT fluctuations in pp and Pb-Pb collisions at the LHC // European physical journal C : particles and fields, 74 (2014), 3077, 15. doi: 10.1140/epjc/s10052-014-3077-y

Podaci o odgovornosti

Abelev, B. ... ; Antičić, Tome ; ... ; Gotovac, Sven ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Šimatović, Goran ; ... ; Vicković, Linda ; ... ; Zyzak, M.

ALICE Collaboration

engleski

Event-by-event mean pT fluctuations in pp and Pb-Pb collisions at the LHC

Event-by-event fluctuations of the mean transverse momentum of charged particles produced in pp collisions at s√ = 0.9, 2.76 and 7 TeV, and Pb–Pb collisions at sNN‾‾‾‾√ = 2.76 TeV are studied as a function of the charged-particle multiplicity using the ALICE detector at the LHC. Dynamical fluctuations indicative of correlated particle emission are observed in all systems. The results in pp collisions show little dependence on collision energy. The Monte Carlo event generators PYTHIA and PHOJET are in qualitative agreement with the data. Peripheral Pb–Pb data exhibit a similar multiplicity dependence as that observed in pp. In central Pb–Pb, the results deviate from this trend, featuring a significant reduction of the fluctuation strength. The results in Pb–Pb are in qualitative agreement with previous measurements in Au–Au at lower collision energies and with expectations from models that incorporate collective phenomena.

fluctuations ; pT ; LHC

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Podaci o izdanju

74

2014.

3077

15

objavljeno

1434-6044

1434-6052

10.1140/epjc/s10052-014-3077-y

Povezanost rada

Fizika

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