Thermal model description of the particle spectra in the few-GeV energy regime

¹ Institut für Kernphysik, Technische Universitä Darmstadt, 64289 Darmstadt, Germany
² Institute of Theoretical Physics, Jagiellonian University, 30-348 Kraków, Poland
³ GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
⁴ Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Kraków, Poland
⁵ Marian Smoluchowski Institute of Physics, Jagiellonian University, 30-348 Kraków, Poland
⁶ Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt, Germany

^* e-mail: S.Harabasz@gsi.de

Published online: 1 February 2022

Abstract

It has been demonstrated that Statistical Hadronization Model fits perfectly to particle yields at freeze-out in heavy-ion and hadron collisions at LHC, RHIC and SPS, where quark-gluon plasma is created. It is however entirely not clear if particles emitted in the few-GeV energy regime can be understood as emerging from thermalized hadronic medium. Our recent work suggests that this might be the case. By implementing appropriate fireball geometry and expansion pattern in the THERMINATOR (THERMal heavy IoN generATOR) it was possible to describe not only yields, but also the spectra of most abundant particles measured at GSI SIS18. Most of the latter are pure prediction of the model. We present details of the model and extended comparison with experimental data and discuss further developments.