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Event-by-event fluctuations at 40, 80 and 158 A GeV/c in Pb + Au collisions

Hiroyuki Sako and Harald Appelshäuser (for the CERES/NA45 Collaboration)

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Event-by-event fluctuations of mean pT and net charge in 40, 80 and 158 A GeV/c Pb+Au collisions are presented. The observed dynamical mean pT fluctuations in central events of about 1% are very similar to results from RHIC. The centrality dependence of mean pT fluctuations at 158 A GeV/c shows a peculiar non-monotonic pattern with respect to the extrapolation from the fluctuations measured in p+p collisions. Dynamical net charge fluctuations smaller than the charge conservation limit are observed. After correction for charge conservation, the measured fluctuation signal in central events is comparable to RHIC results.


PACS

12.38.Mh Quark–gluon plasma

12.40.Ee Statistical models

25.75.-q Relativistic heavy-ion collisions

Subjects

Nuclear physics

Particle physics and field theory

Dates

Issue 8 (August 2004)

Received 15 March 2004

Published 19 July 2004



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