Analysis of Kaon fluctuations from the beam energy scan at RHIC

Claudia Ratti, Rene Bellwied, Jacquelyn Noronha-Hostler, Paolo Parotto, Israel Portillo Vazquez, Jamie M. Stafford

Research output: Contribution to journalArticlepeer-review


We analyze the recent STAR collaboration results on net-kaon fluctuations in the framework of the Hadron Resonance Gas (HRG) model. Our purpose is to extract the freeze-out temperature and chemical potential as functions of the collision energy. In our HRG model, we use the complete hadron spectrum from the latest PDG list. These results are compared to the freeze-out parameters obtained from a combined analysis of net-electric charge and net-proton fluctuations. At the highest collision energies, kaons need about 10-15 MeV higher freeze-out temperatures than the light hadrons. Predictions for moment ratios of the net-Lambda multiplicity distribution are obtained along the freeze-out lines. Lambda fluctuations are sensitive to the difference in the freeze-out temperatures observed in our analysis.

Original languageEnglish (US)
Pages (from-to)799-802
Number of pages4
JournalNuclear Physics A
StatePublished - Feb 2019
Externally publishedYes


  • Heavy-ion collisions
  • QCD thermodynamics
  • Quark-gluon plasma

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Analysis of Kaon fluctuations from the beam energy scan at RHIC'. Together they form a unique fingerprint.

Cite this