Hadronic resonance production and interaction in partonic and hadronic matter in EPOS3 with and without the hadronic afterburner UrQMD

TL;DR

This paper investigates how hadronic resonances are produced and interact in the medium created in Pb-Pb collisions at 2.76 TeV, using the EPOS3 model with and without the UrQMD hadronic afterburner, comparing predictions with experimental data.

Contribution

It introduces a detailed study of resonance production and suppression in heavy-ion collisions using the EPOS3 model with UrQMD, highlighting the effects of the hadronic phase.

Findings

Resonance yields depend on collision centrality.

Suppression of K(892) resonance increases with centrality.

Predicted particle ratios align with experimental observations.

Abstract

We study the production of hadronic resonances and their interaction in the partonic and hadronic medium using the EPOS3 model, which employs the UrQMD model for the description of the hadronic phase. We investigate the centrality dependence of the yields and momentum distributions for various resonances (rho(770),K(892),phi(1020),Delta(1232),Sigma(1385),Lambda(1520),Xi(1530) and their antiparticles) in Pb-Pb collisions at sNN= 2.76 TeV. The predictions for K(892) and phi(1020) will be compared with the experimental data from the ALICE collaboration. The observed signal suppression of the K(892) with increasing centrality will be discussed with respect to the resonance interaction in the hadronic medium. The mean transverse momentum and other particle ratios such as phi(1020)/p and Omega/phi(1020) will be discussed with respect to additional contributions from the hadronic medium interactions.