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Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2019

Freeze-out conditions from strangeness observables at RHIC

Résumé

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.

Dates et versions

hal-01827970 , version 1 (02-07-2018)

Identifiants

Citer

Marcus Bluhm, Marlene Nahrgang. Freeze-out conditions from strangeness observables at RHIC. European Physical Journal C: Particles and Fields, 2019, 79 (2), pp.155. ⟨10.1140/epjc/s10052-019-6661-3⟩. ⟨hal-01827970⟩
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