Yield ratio of hypertriton to light nuclei in heavy-ion collisions from $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}$ = 4.9 GeV to 2.76 TeV

Abstract

We resolve the difference in the yield ratio ${\mathrm{S}}_3$ = $\frac{{\mathrm{N}}_{{}_{\mathrm{\Lambda }}^3\mathrm{H}}/{\mathrm{N}}_{\mathrm{\Lambda }}}{{\mathrm{N}}_{{}^3\mathrm{He}}/{\mathrm{N}}_{\mathrm{p}}}$ measured in Au+Au collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}$ = 200 GeV and in Pb-Pb collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}$ = 2.76 TeV by adopting a different treatment of the weak decay contribution to the proton yield in Au+Au collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}$ = 200 GeV. We then use the coalescence model to extract information on the $\Lambda$ and nucleon density fluctuations at the kinetic freeze-out of heavy ion collisions. We also show from available experimental data that the yield ratio ${\mathrm{S}}_2$ = $\frac{{\mathrm{N}}_{{}_{\mathrm{\Lambda }}^3\mathrm{H}}}{{\mathrm{N}}_{\mathrm{\Lambda }}{\mathrm{N}}_{\mathrm{d}}}$ is a more promising observable than ${\mathrm{S}}_3$ for probing the local baryon-strangeness correlation in the produced medium.

arXiv comment15 pages, 2 figures, 3 tables, submitted for publication

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Cited by in corpus (8)

• Properties of the QCD Matter -- An Experimental Review of Selected Results from RHIC BES Program
• Light nuclei production in relativistic heavy ion collisions from the AMPT model
• Coalescence, the thermal model and multi-fragmentation: The energy and volume dependence of light nuclei production in heavy ion collisions
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• Production characteristics of light nuclei, hypertritons and $\Omega$-hypernuclei in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV