Freeze-out conditions from strangeness observables at RHIC

Abstract

We determine chemical freeze-out conditions from strangeness observables measured at RHIC beam energies. Based on a combined analysis of lowest-order net-Kaon fluctuations and strange anti-baryon over baryon yield ratios we obtain visibly enhanced freeze-out conditions at high beam energies compared to previous studies which analyzed net-proton and net-charge fluctuations. Our findings are in qualitative agreement with the recent study [1] which utilizes the net-Kaon fluctuation data in combination with information from lattice QCD. Our complimentary approach shows that also strange hadron yield ratios are described by such enhanced freeze-out conditions.

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Cited by in corpus (19)

• Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter
• Off-diagonal correlators of conserved charges from lattice QCD and how to relate them to experiment
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• Lattice-based equation of state at finite baryon number, electric charge and strangeness chemical potentials
• Freeze-out temperature from net-Kaon fluctuations at RHIC
• Influence of hadronic resonances on the chemical freeze-out in heavy-ion collisions
• Temperature and fluid velocity on the freeze-out surface from $\pi$, $K$, $p$ spectra in pp, p--Pb and Pb--Pb collisions
• Global fluid fits to identified particle transverse momentum spectra from heavy-ion collisions at the Large Hadron Collider
• Flavour and Energy Dependence of Chemical Freeze-out Temperatures in Relativistic Heavy Ion Collisions from RHIC-BES to LHC Energies
• Baseline predictions of elliptic flow and fluctuations at the RHIC Beam Energy Scan using response coefficients
• System Size and Flavour Dependence of Chemical Freeze-out Temperatures in ALICE Data from pp, pPb and PbPb Collisions at LHC Energies
• Probing fluctuations and correlations of strangeness by net-kaon cumulants in Au+Au collisions at $\sqrt{s_{NN}}=7.7$ GeV
• Constraining the hadronic spectrum and repulsive interactions in a hadron resonance gas via fluctuations of conserved charges
• Chemical freeze-out parameters of net-kaons in heavy-ion collisions
• Coupled baryon, electric charge and strangeness fluctuations in heavy-ion collisions
• Ratio of baryon and electric-charge cumulants at second order with acceptance corrections
• Smooth matching of $\hat{q}$ from hadronic to quark and gluon degrees of freedom
• Systematics of the chemical freeze-out line in the high baryon density regime explored at SIS100
• Extracting the strangeness freeze-out temperature from net-Kaon data at RHIC