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

Journal Article · · EPJ Web of Conferences (Online)
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [7];  [6]
  1. University of Houston, TX (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. Lucht Probst Assoc., GmbH, Frankfurt (Germany)
  3. Technical University Munich (Germany)
  4. University of Illinois at Urbana-Champaign, IL (United States)
  5. University of Wuppertal (Germany)
  6. University of Houston, TX (United States)
  7. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
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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 freezeout 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.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of Illinois Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC02-05CH11231; SC0020633
OSTI ID:
2242471
Journal Information:
EPJ Web of Conferences (Online), Journal Name: EPJ Web of Conferences (Online) Vol. 259; ISSN 2100-014X
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English

References (16)

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Energy and system size dependence of chemical freeze-out in relativistic nuclear collisions journal April 2006
Hadron resonances and phase threshold in heavy ion collisions journal February 2007
Freeze-out temperature from net-kaon fluctuations at energies available at the BNL Relativistic Heavy Ion Collider journal March 2019
Hadron Formation in Relativistic Nuclear Collisions and the QCD Phase Diagram journal August 2013
van der Waals Interactions in Hadron Resonance Gas: From Nuclear Matter to Lattice QCD journal May 2017

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Heavy-ion collisions
freeze-out
thermal models