Freeze-out properties from net-Kaon fluctuations at RHIC

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

Research output: Contribution to journalConference articlepeer-review


We calculate the net-kaon mean-over-variance in the hadron resonance gas model and compare it to the experimental data by the STAR collaboration. We show that it is not possible to match the experimental values using the freeze-out parameters obtained from a combined fit of net-proton and net-electric charge mean-over-variance. At the highest collision energies, kaons need about 10-15 MeV higher freeze-out temperatures than the light hadrons. We also predict the variance-over-mean and skewness-times-variance for net-Λ particles at the light and strange chemical freeze-out parameters. It turns out that these Λ fluctuations are sensitive to the difference in the freeze-out temperatures observed in our analysis.

Original languageEnglish (US)
Article number012003
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - Sep 18 2018
Externally publishedYes
Event34th Winter Workshop on Nuclear Dynamics 2018 - Deshaies, Guadeloupe
Duration: Mar 25 2018Mar 31 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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