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.

15 pages, 2 figures, 3 tables, submitted for publication

References in corpus (6)

• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Hypernuclei, dibaryon and antinuclei production in high energy heavy ion collisions: Thermal production vs. Coalescence
• Multi-quark hadrons from Heavy Ion Collisions
• Beam energy dependence of (anti-)deuteron production in Au+Au collisions at RHIC
• Elliptic flow of deuterons in relativistic heavy-ion collisions
• Probing QCD critical fluctuations from the yield ratio of strange hadrons in relativistic heavy-ion collisions

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
• Observation of Directed Flow of Hypernuclei ${}_{\Lambda }^3$H and ${}_{\Lambda }^4$H in $\sqrt{s_{\mathrm{NN}}}$ = 3 GeV Au+Au Collisions at RHIC
• Measurement of ${}_{\mathrm{\Lambda }}^4\mathrm{H}$ and ${}_{\mathrm{\Lambda }}^4\mathrm{He}$ binding energy in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 3 GeV
• The effect of hadronic scatterings on the measurement of vector meson spin alignments in heavy-ion collisions
• Examination of background effects on light-nuclei yield ratio in relativistic heavy-ion collisions
• Production characteristics of light nuclei, hypertritons and $\Omega$-hypernuclei in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV