# Evolving Charge Correlations in a Hybrid Model with both Hydrodynamics and Hadronic Boltzmann Descriptions

## TL;DR

This paper presents a comprehensive model combining hydrodynamics and hadronic Boltzmann descriptions to study charge correlations in heavy-ion collisions, providing new insights into charge evolution and comparison with experimental data.

## Contribution

It introduces a novel integrated approach to evolve charge correlations through both hydrodynamic and hadronic stages in heavy-ion collisions.

## Key findings

- Charge correlations are successfully evolved through the entire collision process.
- Charge balance functions are characterized as functions of rapidity and azimuthal angle.
- Comparison with STAR data validates the model's effectiveness.

## Abstract

Correlations related to local charge conservation provide insight into the creation and evolution of up, down and strange charges in the quark-gluon plasma. Here, the evolution of charge correlations is overlaid onto a hydrodynamic calculation for the regions where temperature exceed 155 MeV, then transferred and carried through a microscopic model of the hadronic stage. Thus, for the first time, charge correlations are evolved consistently with a full state-of-the-art description of a heavy-ion collision. The charge correlations are projected onto charge balance functions, which characterize such correlations in the final state, and are presented as a function of relative rapidity and relative azimuthal angle for Au/Au collisions. The role of the hadronic stage is investigated. Calculation of the contribution to charge-separation observables related to the chiral magnetic effect are also presented. Calculations are compared to data from the STAR Collaboration at RHIC (Relativistic Heavy Ion Collider) data when possible.