Forward-backward multiplicity correlations in relativistic heavy-ion collisions in a superposition approach

Understand

We analyze the multiplicity correlations between distant forward and backward rapidity regions in relativistic heavy-ion collisions in a superposition framework, where the particle production occurs through independent emission from correlated sources.

• This in principle allows for inferring information on the long-range forward-backward correlations of the sources in the earliest phase of the collision, based solely on the experimental information on the statistical features of the observed particle distributions.
• Our three-stage study incorporates the fluctuations of parton production in the early phase, the effect of intermediate hydrodynamic evolution, as well as fluctuations in the production of particles at freeze-out.
• We investigate the dependence of the results on the features of the overlaid distributions and hydrodynamics, as well as the centrality dependence.