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Energy dependence of light hypernuclei production in heavy-ion collisions from a coalescence and statistical-thermal model perspective
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Energy dependence of light hypernuclei production in heavy-ion collisions from a coalescence and statistical-thermal model perspective
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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.
Forward citations
Cited by 5 Pith papers
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Probing (Hyper)Nuclei Wave Functions and Production Mechanisms in $\sqrt{s_{\rm{NN}}}=200$ GeV Isobar Collisions at RHIC
Isobar collision yields of ³_ΛH and light nuclei favor coalescence with non-Gaussian hypertriton wave functions that carry enhanced short-distance d–Λ probability, inconsistent with a Gaussian ansatz tied to the measu...
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Collision Energy Dependence of Hypertriton Production in Au+Au Collisions at RHIC
Hypertriton yields and Lambda ratios increase at lower collision energies but remain a factor of two below thermal models, while the double ratio to triton production stays constant at 0.4, pointing to intrinsically l...
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Hypertriton production yield in LHC pp collisions, described by nuclear coalescence, confirms its halo structure with a Lambda separation of 9.54 fm from the deuteron core.
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Hypertriton Production in Au+Au Collisions from STAR BES-II
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The statistical hadronization model successfully describes hadron production in nuclear collisions over broad energies, with implications for QCD phase structure.
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