Multibin correlations in a superposition approach to relativistic heavy-ion collisions

TL;DR

This paper presents a superposition model for analyzing multiplicity correlations across rapidity bins in ultra-relativistic heavy-ion collisions, linking initial partonic sources to final hadron distributions.

Contribution

It introduces simple relations between moments of hadron multiplicities and initial sources, involving few parameters, and demonstrates their application with Glauber model simulations.

Findings

Relations between multiplicity moments and initial sources derived

Model tested with Glauber simulations

Results relevant for interpreting LHC multibin correlation data

Abstract

Analysis of correlation of multiplicities between various rapidity bins is carried out in the framework of a superposition approach consisting of three phases of the ultra-relativistic nuclear collision: early partonic phase, intermediate collective evolution, and statistical hadronization. Simple relations between the moments of produced hadrons and the moments of the sources produced in the initial partonic phase are presented. They involve only a few effective parameters describing the of microscopic dynamics of the system. We illustrate the practicality of the approach with the Glauber model simulations. Our study carries direct relevance for the interpretation of the upcoming results for the multibin multiplicity correlations from the LHC, which will help in an assessment of the correlation features of the state formed in the earliest stage of the reaction.