Quark Matter 2025

Collective flow analysis using bulk and strange hadrons produced in relativistic heavy-ion collisions

Not scheduled

20m

Goethe University Frankfurt, Campus Westend, Theodor-W.-Adorno-Platz 1, 60629 Frankfurt am Main, Germany

Poster Light and strange flavor physics & nuclei

Speaker

Oana Ristea (University of Bucharest, Faculty of Physics)

Description

The investigation of the properties of nuclear matter under extreme conditions is one of the main goals of the relativistic heavy-ion collisions. The analysis of transverse momentum spectra of produced particles provide insights into the particle production mechanisms as well as the freeze-out conditions of the system created in these collisions. We present the study of the kinetic freeze-out properties of non-strange hadrons ($\pi^{\pm}$, $\rm p$, $\overline{\rm p}$, d, $\overline{\rm d}$) along with strange hadrons ( (${\rm K}^{0}_{\rm{S}}$, $\rm \Lambda$, $\rm \overline{\Lambda}$, $\rm \Xi^{-}$, $\rm \overline{\Xi}^{+}$, $\phi$, $\rm \Omega^{-}$, and $\rm \overline{\Omega}^{+}$) in relativistic heavy-ion collisions at RHIC-BES energies. The energy and centrality dependence of freeze-out parameters, i.e., kinetic freeze-out temperature and collective flow velocity, extracted using the Blast-Wave model, for non-strange and strange hadrons will be presented. The average transverse momentum $$ of strange hadrons as a function of system centrality and reduced hadron mass, $m/n_{q}$, will be also presented. We observe in central Au-Au collisions that $$ as a function of reduced mass is higher for baryons than that for mesons, although it increases linearly with $m/n_{q}$. However, for peripheral events, there is an approximate scaling of average $p_T$ with the reduced hadron mass. These results will be compared with AMPT simulations, default and string-melting versions, in order to understand the importance of partonic degrees of freedom in collectivity observables.