Eur. Phys. J. A (2023) 59: 272
https://doi.org/10.1140/epja/s10050-023-01182-6

Regular Article - Experimental Physics

Systematics of yields of strange hadrons from heavy-ion collisions around threshold energies

University of Warsaw, Pasteura 5, 02-093, Warsaw, Poland

^a krzysztof.piasecki@fuw.edu.pl

Received: 7 July 2023
Accepted: 26 October 2023
Published online: 20 November 2023

Abstract

The parametrizations of experimental yields of K${}^{\pm ,0}$, $\varphi$ and $\mathrm{\Lambda }+{\mathrm{\Sigma }}^0$ are proposed as function of available energy, $\sqrt{s_{\text{NN}}}$ , and number of participants, ${⟨A_{\text{part}}⟩}_{\text{b}}$ , for $\sqrt{s_{\text{NN}}}$ from 2.15 to 3 GeV. For all the dataset the ${⟨A_{\text{part}}⟩}_{\text{b}}$ was extracted using the Glauber Monte Carlo method. The $\alpha$ exponent of yield dependency on ${⟨A_{\text{part}}⟩}_{\text{b}}$ appears not to change with beam energy and is found to be 1.30 ± 0.02. Our parametrization and the predictions of public versions of RQMD.RMF, SMASH and UrQMD transport models are compared to the HADES experimental data for Ar+KCl at $\sqrt{s_{\text{NN}}}$ of 2.61 GeV. The phenomenological parametrization currently offers the best overall description of these yields. Predictions are given for yields from Ag + Ag collisions at available energies of 2.41 and 2.55 GeV, analysed by HADES, Au + Au experiment at 2.16 and 2.24 GeV planned by this collaboration, some yields for STAR’s Au + Au collisions at 3 GeV, and for Au + Au collisions planned by CBM, up to 3.85 GeV.