Effects of hadronic rescattering on multistrange hadrons in high-energy nuclear collisions

TL;DR

This study investigates how hadronic rescattering influences the final distributions of multistrange hadrons in high-energy nuclear collisions, revealing that they are less affected by rescattering and better reflect earlier QGP properties.

Contribution

It introduces a hybrid model combining hydrodynamics and transport theory to analyze rescattering effects on multistrange hadrons in nuclear collisions.

Findings

Multistrange hadrons undergo less rescattering than nonstrange hadrons.

Their distributions more accurately reflect the early QGP stage.

Rescattering effects vary among different hadron species.

Abstract

We study the effects of hadronic rescattering on hadron distributions in high-energy nuclear collisions by using an integrated dynamical approach. This approach is based on a hybrid model combining (3+1)-dimensional ideal hydrodynamics for the quark gluon plasma (QGP), and a transport model for the hadron resonance gas. Since the hadron distributions are the result of the entire expansion history of the system, understanding the QGP properties requires investigating how rescattering during the hadronic stage affects the final distributions of hadrons. We include multistrange hadrons in our study, and quantify the effects of hadronic rescattering on their mean transverse momenta and elliptic flow. We find that multistrange hadrons scatter less during the hadronic stage than nonstrange particles, and thus their distributions reflect the properties of the system in an earlier stage than the distributions of nonstrange particles.