Detailed knowledge of the hadronic spectrum is still an open question, which has phenomenological consequences on the study of heavy-ion collisions. A previous lattice QCD study concluded that additional strange resonances are missing in the currently tabulated lists provided by the Particle Data Group (PDG). That study identified the list labeled PDG2016+ as the ideal spectrum to be used as an input in thermal-model-based analyses. In this work, we determine the effect of additional resonances on the freeze-out parameters of systems created in heavy-ion collisions. These parameters are obtained from thermal fits of particle yields and net-particle fluctuations. For a complete picture, we compare several hadron lists including both experimentally discovered and theoretically predicted states. We find that the inclusion of additional resonances mildly influences the extracted parameters-with a general trend of progressively lowering the temperature-but is not sufficient to close the gap in temperature between light and strange hadrons previously observed in the literature.

Influence of hadronic resonances on the chemical freeze-out in heavy-ion collisions

P. Alba;V. Mantovani Sarti;P. Parotto;C. Ratti;
2020-01-01

Abstract

Detailed knowledge of the hadronic spectrum is still an open question, which has phenomenological consequences on the study of heavy-ion collisions. A previous lattice QCD study concluded that additional strange resonances are missing in the currently tabulated lists provided by the Particle Data Group (PDG). That study identified the list labeled PDG2016+ as the ideal spectrum to be used as an input in thermal-model-based analyses. In this work, we determine the effect of additional resonances on the freeze-out parameters of systems created in heavy-ion collisions. These parameters are obtained from thermal fits of particle yields and net-particle fluctuations. For a complete picture, we compare several hadron lists including both experimentally discovered and theoretically predicted states. We find that the inclusion of additional resonances mildly influences the extracted parameters-with a general trend of progressively lowering the temperature-but is not sufficient to close the gap in temperature between light and strange hadrons previously observed in the literature.
2020
101
5
054905
054916
P. Alba; V. Mantovani Sarti; J. Noronha-Hostler; P. Parotto; I. Portillo-Vazquez; C. Ratti; J. M. Stafford
File in questo prodotto:
File Dimensione Formato  
PhysRevC.101.054905.pdf

Accesso aperto

Tipo di file: PDF EDITORIALE
Dimensione 1.34 MB
Formato Adobe PDF
1.34 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1947510
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 22
  • ???jsp.display-item.citation.isi??? 23
social impact