https://doi.org/10.1140/epjc/s10052-019-6661-3
Regular Article - Theoretical Physics
Freeze-out conditions from strangeness observables at RHIC
1
Institute of Theoretical Physics, University of Wrocław, 50-204, Wrocław, Poland
2
SUBATECH UMR 6457 (IMT Atlantique, Université de Nantes, IN2P3/CNRS), 4 rue Alfred Kastler, 44307, Nantes, France
* e-mail: marcus.bluhm@ift.uni.wroc.pl
Received:
2
July
2018
Accepted:
8
February
2019
Published online:
20
February
2019
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 (Bellwied et al. in arXiv:1805.00088 [hep-ph], 2018) which utilizes the net-kaon fluctuation data in combination with information from lattice QCD. Our complementary approach shows that also strange hadron yield ratios are described by such enhanced freeze-out conditions.
© The Author(s), 2019
