Search for Long-Range Correlations in Relativistic Heavy-Ion Collisions at SPS Energies

TL;DR

This study investigates forward-backward multiplicity correlations in relativistic heavy-ion collisions at SPS energies, finding mainly short-range correlations with some extension due to nuclear geometry, but no definitive evidence of long-range correlations.

Contribution

The paper provides an analysis of F-B correlations in heavy-ion collisions at SPS energies and compares experimental data with a multi-phase transport model, highlighting the nature and extent of correlations.

Findings

F-B correlations are mainly short-range.

Correlation range increases with projectile mass.

No conclusive evidence of long-range correlations.

Abstract

Long range correlations are searched for by analyzing the experimental data on 16O-AgBr and 32S-AgBr collisions at 200A GeV/c and the results are compared with the predictions of a multi phase transport (AMPT) model. The findings reveal that the observed forward-backward (F-B) multiplicity correlations are mainly of short-range in nature. The range of F-B correlations are observed to extend with increasing projectile mass. The observed extended range of F-B correlations might be due to overall multiplicity fluctuations arising because of nuclear geometry. The findings are not sufficient for making any definite conclusions regarding the presence of long-range correlations.