Adam Olszewski (Jan Kochanowski University)
Multiplicity correlations between distant forward and backward (FB) rapidity regions in relativistic heavy-ion collisions are examined in a superposition framework. Our three-stage approach incorporates the fluctuations of parton production in the early phase (modeled with the Glauber simulations), the effects of intermediate hydrodynamic evolution, and fluctuations in the production mechanism at freeze-out. Characterization of the three stages with several parameters leads to very simple relations between the statistical moments of the distributions of the initial sources and of the produced particles. Our study has a direct relevance for the interpretation of the upcoming results for the FB correlations at the LHC, allowing for an assessment of the statistical features of the state formed in the earliest stage of the reaction.
Adam Olszewski (Jan Kochanowski University) Wojciech Broniowski (IFJ PAN)