Freeze-out conditions from strangeness observables at RHIC

被引：1
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作者：
Marcus Bluhm
Marlene Nahrgang
机构：
[1] University of Wrocław,Institute of Theoretical Physics
[2] SUBATECH UMR 6457 (IMT Atlantique,undefined
[3] Université de Nantes,undefined
[4] IN2P3/CNRS),undefined
来源：
The European Physical Journal C | 2019年 / 79卷
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摘要：
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.
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