Speaker
Description
Production of nuclei and hypernuclei in relativistic ion collisions.
A. Botvina and M. Bleicher.
Institute for Theoretical Physics, J. W. Goethe University,
D-60438 Frankfurt am Main, Germany.
We investigate the formation of light nuclei and hypernuclei in the
rapidly expanding nuclear matter after relativistic nucleus-nucleus
collisions. The primary hadronization phase including the strangeness
production is described with UrQMD model. It is demonstrated that the
nucleation process can be explained within the statistical approach by
applying the local equilibrium concept. We subdivide the expanding
nuclear system into several parts (clusters) consisting of nucleons and
hyperons which are close in the phase space. The production of nuclei
takes place inside these clusters, and it can be described as their
statistical decay in the coexistence region of the nuclear phase
transition. The local chemical equilibrium concept explain consistently
many experimental data which was not possible with the statistical
models under assumption of global chemical equilibrium [1,2]. This model
was also successfully applied to describe experimental data on both
normal nuclei and strange hypernuclei production in the GSI and RHIC-BES
energy range [3,4]. We predict the production of double hypernuclei up
to $^4_{\Lambda \Lambda}$H and further intermediate mass nuclei up to
$^8$Be for Au+Au central collisions at $\sqrt{s_{NN}}$=3 GeV, recently
explored by the STAR experiments [4]. The production of charmed nuclei
is discussed too. These new nuclei can be identified by the measurement
of the correlated particles.
[1] A. S. Botvina, N. Buyukcizmeci and M. Bleicher,
Phys. Rev. C {\bf 103}, 064602 (2021).
[2] A. S. Botvina, N. Buyukcizmeci and M. Bleicher,
Phys. Rev. C {\bf 106}, 014607 (2022).
[3] N. Buyukcizmeci, T. Reichert, A.S. Botvina, and M. Bleicher,
Phys. Rev. C {\bf 108}, 054904 (2023).
[4] N. Buyukcizmeci, T. Reichert, A.S. Botvina, and M. Bleicher,
arXiv: 2410.17449 (2024).
| Category | Theory |
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