Forward-backward correlations between intensive observables

TL;DR

This paper explores forward-backward correlations between intensive observables in high-energy collisions, revealing clearer signals of initial interaction stages like string fusion, using a dipole-based Monte Carlo model.

Contribution

It introduces a novel approach to analyze forward-backward correlations of intensive observables, providing insights into the initial stages of hadronic interactions and string fusion effects.

Findings

Correlation strength depends on collision centrality and energy.

Decline of correlation coefficient observed in central Pb-Pb collisions at LHC.

Results compared with alternative models and MC generators.

Abstract

We demonstrate that the investigations of the forward-backward correlations between intensive observables enable to obtain more clear signal about the initial stage of hadronic interaction, e.g. about the process of string fusion, compared to usual forward-backward multiplicity correlations. As an example, the correlation between mean-event transverse momenta of charged particles in separated rapidity intervals is considered. We performed calculations in the framework of dipole-based Monte Carlo string fusion model. We obtained the dependence of the correlation strength on the collision centrality for different initial energies and colliding systems. It is shown that the dependence reveals the decline of the correlation coefficient for most central Pb-Pb collisions at LHC energy. We compare the results both with the ones obtained in alternative models and with the ones obtained by us using various MC generators.