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

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 [$\ensuremath{\rho}{(770)}^{0}$, ${K}^{*}{(892)}^{0}$, $\ensuremath{\phi}(1020)$, $\mathrm{\ensuremath{\Delta}}{(1232)}^{++}$, $\mathrm{\ensuremath{\Sigma}}{(1385)}^{\ifmmode\pm\else\textpm\fi{}}$, $\mathrm{\ensuremath{\Lambda}}(1520)$, $\mathrm{\ensuremath{\Xi}}{(1530)}^{0}$ and their antiparticles] in Pb-Pb collisions at $\sqrt{{s}_{NN}}=\phantom{\rule{4.pt}{0ex}}2.76$ TeV. The predictions for ${K}^{*}{(892)}^{0}$ and $\ensuremath{\phi}(1020)$ will be compared with the experimental data from the ALICE collaboration. The observed signal suppression of the ${K}^{*}{(892)}^{0}$ 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 $\ensuremath{\phi}(1020)/p$ and $(\mathrm{\ensuremath{\Omega}}+\overline{\mathrm{\ensuremath{\Omega}}})/\ensuremath{\phi}(1020)$ will be discussed with respect to additional contributions from the hadronic medium interactions.