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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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arxiv 2210.11876 v2 pith:EXJRU4TS submitted 2022-10-21 nucl-th nucl-ex

classification nucl-thnucl-ex
keywords coalescencedependencelambdasourcealmostbeamcanonicalcollisions
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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.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Probing (Hyper)Nuclei Wave Functions and Production Mechanisms in $\sqrt{s_{\rm{NN}}}=200$ GeV Isobar Collisions at RHIC

    nucl-ex 2026-07 conditional novelty 6.0 of 10

    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...

  2. Modifications in clusterization procedures for heavy-ion collisions: minimum spanning tree, simulated annealing, coalescence

    nucl-th 2025-12 conditional novelty 6.0 of 10

    The Common Clusterization Library (CCL) provides open-source MST, simulated-annealing, and coalescence cluster finders with a new stable-cluster tracking algorithm, tested against ALADiN and NA49 data.

  3. Directed Flow of Protons and Deuterons in Xe+Cs(I) Collisions: Preliminary BM@N Data and THESEUS Modeling

    nucl-ex 2026-08 conditional novelty 4.0 of 10

    Comparing preliminary BM@N proton and deuteron directed flow with THESEUS shows good proton agreement and a slight deuteron overestimation, tentatively supporting thermodynamic light-nucleus formation.

  4. Proposal from the NA61/SHINE Collaboration for update of European Strategy for Particle Physics

    nucl-ex 2025-07 conditional novelty 4.0 of 10

    NA61/SHINE requests ESPP support to continue SPS hadron production measurements in 2029-2032, motivated by an apparent violation of isospin symmetry in Ar+Sc collisions, first-time charm-anticharm correlation studies,...

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