Energy dependence of fluctuations in central Pb+Pb collisions from NA49 at the CERN SPS

Abstract

The latest NA49 results on fluctuations of multiplicity and average transverse-momentum analyzed on an event-by-event basis are presented for central Pb+Pb interactions over the whole SPS energy range (20A - 158A GeV). The scaled variance of the multiplicity distribution decreases with collision energy whereas the ${\Phi }_{p_T}$ measure of $<p_T>$ fluctuations is small and independent of collision energy. Thus in central Pb+Pb collisions these fluctuations do not show an indication of the critical point of strongly interacting matter.

5 pages, 4 figures, talk presented at Quark Matter 2008 Reference added and some typos corrected

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• Transverse-Mass Spectra in Heavy-Ion Collisions at energies E_{lab} = 2--160 GeV/nucleon
• Multifractal Characteristics of Multiparticle Production in Heavy-Ion Collisions at SPS Energies
• A Study of Fluctuations of Voids in Relativistic Ion-Ion Collisions
• Entropy and multifractality in ring-like and jet-like events produced in 11.6A GeV/c ${}^{197}$Au-AgBr collisions