Energy dependence of light hypernuclei production in heavy-ion collisions from a coalescence and statistical-thermal model perspective

Abstract

A comparison of light hypernuclei production, from UrQMD+coalescence and the thermal model, in heavy ion collisions over a wide range of beam energies and system sizes is presented. We find that both approaches provide generally similar results, with differences in specific details. Especially the ratios of hypertriton to $\Lambda$ are affected by both the source radius $\Delta r$ of the coalescence procedure as well as canonical effects. On the other hand, the double ratio $S_3$ is almost independent of canonical effects, which is in contrast to coalescence. Thus, both the beam energy dependence and centrality dependence of $S_3$ can be used to constrain the hypertriton source radius. To do so the currently available data is not yet sufficient. Elliptic flow is shown to be unaffected by the source size of the nuclei and an almost perfect mass scaling of the elliptic flow is observed. Our predictions further suggest that the existence of the H-dibaryon ($\Lambda \Lambda$) seems ruled out by ALICE data.

10 pages, 11 figures

References in corpus (5)

• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Non-thermal p/pi ratio at LHC as a consequence of hadronic final state interactions
• Formation of hypermatter and hypernuclei within transport models in relativistic ion collisions
• Formation of hypernuclei in heavy-ion collisions around the threshold energies
• Light nuclei in the hadron resonance gas

Cited by in corpus (9)

• Light (anti)nuclei production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Nucleosynthesis of light nuclei and hypernuclei in central Au+Au collisions at $\sqrt{s_{NN}}$=3 GeV
• Light nuclei production in pp and pA collisions in the Baryon Canonical Ensemble
• Momentum correlation of light nuclei in Au + Au collisions at $\sqrt{s_{NN}}$ = 2.0 $\sim$ 7.7 GeV
• Measurement of (anti)alpha production in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Hypertriton Production in Au+Au Collisions from STAR BES-II
• Production of nuclei and hypernuclei in pion-induced reactions near threshold energies
• Interactions of the deuteron with a hadronic medium
• A Data-Guided Coalescence Model for Light Nuclei and Hypernuclei Production in Relativistic Heavy-Ion Collisions at $\sqrt{s_{\mathrm{NN}}}=3$--200 GeV