Abstract
In this paper, we present the results of the transport, coalescence and statistical model calculations to describe the production of hypernuclei and study their properties in relativistic nucleus-nucleus collisions. Such hypernuclei and low-temperature hypermatter can be produced as a result of hyperon capture by nuclear residues and free nucleons. The dynamical reaction stage leading to the strangeness production is described within the transport cascade and UrQMD models. Large excited hypernuclear species can be formed from target and projectile residues in peripheral collisions. To describe its following evolution at high excitation energies we have generalized the statistical multifragmentation model (SMM) on hypernuclei, as well as the evaporation, fission and Fermi-break-up models at low energies. We calculated the yields, the mass with isotopic distributions of produced nuclei and hypernuclei, and found important regularities and correlations. We have also established how the binding energies of hypernuclei can be evaluated via the comparison of isotope yields. Our approach can be used also for multistrange nuclei. We have extended the coalescence model for the formation of excited hyperclusters from individual baryons in the central collisions. De-excitation of hot coalescence clusters presents a novel mechanism for the hypernuclei production and shows new possibilities for their investigation.
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Data Availability Statement
This manuscript has no associated data or the data will not be deposited. [Authors’ comment: The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.]
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Acknowledgements
The authors thank J. Pochodzalla for stimulating discussions. N.B. acknowledges the Scientific and Technological Research Council of Turkey (TUBITAK) support under Project No. 118F111. M.B. and N.B. acknowledges that the work has been performed in the framework of COST Action CA15213 THOR. N.B. and A.S.B thank FIAS and HFHF for hospitality. A.S. Botvina acknowledges the support of Bundesministerium für Bildung und Forschung (BMBF), Germany.
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Communicated by Laura Tolos.
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Buyukcizmeci, N., Botvina, A.S., Ogul, R. et al. Evaluation of hypernuclei in relativistic ion collisions. Eur. Phys. J. A 56, 210 (2020). https://doi.org/10.1140/epja/s10050-020-00217-6
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DOI: https://doi.org/10.1140/epja/s10050-020-00217-6