Charged particle production in the Pb+Pb system at 158 GeV/c per nucleon
P. Deines-Jones, M.L. Cherry, A. Dabrowska, R. Holynski, D. Kudzia,, B.S. Nilsen, A. Olszewski, M. Szarska, A. Trzupek, C.J. Waddington, J.P., Wefel, B. Wilczynska, H. Wilczynski, W. Wolter, B. Wosiek, and K. Wozniak
TL;DR
This study measures charged particle multiplicities in Pb+Pb collisions at 158 GeV/nucleon, revealing lower-than-expected counts and analyzing their distribution and centrality dependence.
Contribution
It provides new experimental data on charged particle production in heavy-ion collisions at SPS energies, challenging existing Monte Carlo models.
Findings
Measured multiplicities are significantly lower than Monte Carlo predictions.
The pseudorapidity distribution shape varies with collision centrality.
Data offers insights into particle production mechanisms in heavy-ion collisions.
Abstract
Charged particle multiplicities from high multiplicity central interactions of 158 GeV/nucleon Pb ions with Pb target nuclei have been measured in the central and far forward projectile spectator regions using emulsion chambers. Multiplicities are significantly lower than predicted by Monte Carlo simulations. We examine the shape of the pseudorapidity distribution and its dependence on centrality in detail.
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