Extracting the strangeness freeze-out temperature from net-Kaon data at RHIC

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

Research output: Contribution to conferencePaperpeer-review

Abstract

Using the moments of the net-kaon distribution calculated within a state of-the-art hadron resonance gas model compared to experimental data from STAR’s Beam Energy Scan, we find that the extracted strange freeze-out temperature is incompatible with the light one extracted from net-proton and net-charge fluctuations. Additionally predictions for net-Lambda fluctuations are made that also appear to be consistent with a higher freeze-out temperature for strange particles. This strangeness freeze-out temperature is roughly 10 − 15 MeV higher than the corresponding light freeze-out temperature. We also discuss cross-susceptibilities using different identified particles, which may be a further test of this two freeze-out temperature picture. Finally, we lay out the necessary updates needed in relativistic hydrodynamic models to take into account for this two freeze-out temperature scenario and present preliminary results of Λ spectra at RHIC for AuAu sNN = 200 GeV collisions that indicate a higher freeze-out temperature is preferred.

Original languageEnglish (US)
StatePublished - Jan 1 2019
Event12th International Workshop on Critical Point and Onset of Deconfinement, CPOD 2018 - Corfu, Greece
Duration: Sep 24 2018Sep 28 2018

Conference

Conference12th International Workshop on Critical Point and Onset of Deconfinement, CPOD 2018
Country/TerritoryGreece
CityCorfu
Period9/24/189/28/18

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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