May 17 – 22, 2021
US/Eastern timezone

Thermal-model-based characterization of heavy-ion-collision systems at chemical freeze-out

May 18, 2021, 11:30 AM
Room B (Zoom)

Room B


zoom co-host: Klaus Dehmelt


Jamie Stafford (University of Houston)


We investigate the chemical freeze-out in heavy-ion collisions (HICs) and the impact of the hadronic spectrum on thermal model analyses [1, 2]. Detailed knowledge of the hadronic spectrum is still an open question, which has phenomenological consequences on the study of HICs. By varying the number of resonances included in Hadron Resonance Gas (HRG) Model calculations, we can shed light on which particles may be produced. Furthermore, we study the influence of the number of states on the so-called two flavor freeze-out scenario, in which strange and light particles can freeze-out separately. We consider results for the chemical freeze-out parameters obtained from thermal model fits and from calculating net-particle fluctuations. We will show the effect of using one global temperature to fit all particles and alternatively, allowing particles with and without strange quarks to freeze-out separately.

[1] P. Alba et al. Phys.Rev.C 101 054905 (2020)
[2] R. Bellwied et al. Phys.Rev.C 99 034912 (2019)

Primary authors

Jamie Stafford (University of Houston) Paolo Giuseppe Alba Valentina Mantovani-Sarti (Technical University Munich) Jaki Noronha-Hostler (University of Illinois at Urbana-Champaign) Paolo Parotto (University of Wuppertal) Israel Portillo (University of Houston) Claudia Ratti (University of Houston)

Presentation materials