Forward-backward correlations in proton-proton collisions at the LHC energy: A model based study

TL;DR

This study investigates forward-backward correlations in proton-proton collisions at 13 TeV using the EPOS3 model, comparing results across energies and with previous data, revealing consistent trends and saturation effects at high energies.

Contribution

It provides a model-based analysis of FB correlations at 13 TeV and compares these with lower energies, highlighting energy dependence and saturation behavior.

Findings

FB correlation strength trends are similar across energies

Correlation strength tends to saturate at very high energies

Model results agree with previous experimental observations

Abstract

Forward-backward (FB) multiplicity and momentum correlations of produced particles between symmetrically located pseudorapidity ($\eta$) intervals have been studied using the $p$QCD inspired EPOS3 model with and without hydrodynamical evolution of particles in proton-proton ($pp$) collisions at the center-of-mass energy, $\sqrt{s}=13$ TeV. The pseudorapidity-gap ($\eta_{gap}$) dependence of FB correlation strength is compared with our previously published results at $\sqrt{s}=$ 0.9, 2.76 and 7 TeV. The study reveals that the general trends of FB correlation strength at $\sqrt{s}=13$ TeV are similar to our previous observations at lower center-of-mass energies. We also find that the $\delta\eta$-weightage average of FB correlation strength as a function of different center-of-mass energies ($\sqrt{s}=$ 0.9, 2.76, 7 and 13 TeV) tends to saturate at very high energy.