# Feasibility Study of Hypernucleus Production at NICA/MPD

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## Abstract

**:**

## 1. Introduction

## 2. The MPD at the NICA Complex

## 3. Reconstruction of Hypernuclei in the MPD Experiment

## 4. Summary

## Author Contributions

## Funding

## Data Availability Statement

## Conflicts of Interest

## References

- Rafelski, J. Discovery of quark-gluon-plasma: Strangeness diaries. Eur. Phys. J. Spec. Top.
**2020**, 229, 1–140. [Google Scholar] [CrossRef][Green Version] - Koch, V.; Majumder, A.; Randrup, J. Baryon-strangeness correlations: A diagnostic of strongly interacting matter. Phys. Rev. Lett.
**2005**, 95, 182301. [Google Scholar] [CrossRef] [PubMed][Green Version] - Wang, D.; Zhang, S.; Ma, Y. System size dependence of baryon-strangeness correlation in relativistic heavy ion collisions from a multiphase transport model. Phys. Rev. C
**2021**, 103, 024901. [Google Scholar] [CrossRef] - Zhang, S.; Chen, J.H.; Crawford, H.; Keane, D.; Ma, Y.G.; Xu, Z.B. Searching for onset deconfinement via hypernuclei baryon-strangeness correlations. Phys. Lett. B.
**2010**, 684, 224–227. [Google Scholar] [CrossRef][Green Version] - Lattimer, J.M.; Prakash, M. The physics of neutron stars. Science
**2004**, 304, 536–542. [Google Scholar] [CrossRef] [PubMed][Green Version] - Tolos, L.; Fabbietti, L. Strangeness in nuclei and neutron stars. Prog. Part. Nucl. Phys.
**2020**, 112, 103770. [Google Scholar] [CrossRef][Green Version] - Acharya, S.; et al.; [ALICE Collaboration]. Λ3H and Λ ¯3 H¯ lifetime measurement in Pb–Pb collisions at s
_{NN}=5.02 TeV via two-body decay. Phys. Lett. B.**2019**, 797, 134905. [Google Scholar] [CrossRef] - Abdallah, M.S.; et al.; [STAR Collaboration]. Measurements of Λ3H and Λ4H lifetimes and yields in Au+Au collisions in the high baryon density region. Phys. Rev. Lett.
**2022**, 128, 202301. [Google Scholar] [CrossRef] [PubMed] - Kekelidze, V.D.; Lednicky, R.; Matveev, V.A.; Meshkov, I.N.; Sorin, A.S.; Trubnikov, G.V. Three stages of the NICA accelerator complex. Eur. Phys. J. A
**2016**, 52, 211. [Google Scholar] [CrossRef] - Steinheimer, J.; Gudima, K.; Botvina, A.; Mishustin, I.; Bleicher, M.; Stöcker, H. Hypernuclei, dibaryon and antinuclei production in high energy heavy ion collisions: Thermal production vs. coalescence. Phys. Lett. B
**2012**, 714, 85–91. [Google Scholar] [CrossRef][Green Version] - Abgaryan, V.; et al.; [MPD Collaboration]. Status and initial physics performance studies of the MPD experiment at NICA. Eur. Phys. J. A
**2022**, 58, 140. [Google Scholar] [CrossRef] - Aichelin, J.; Bratkovskaya, E.; Le Fèvre, A.; Kireyeu, V.; Kolesnikov, V.; Leifels, Y.; Voronyuk, V.; Coci, G. Parton-hadron-quantum-molecular dynamics: A novel microscopic n-body transport approach for heavy-ion collisions, dynamical cluster formation, and hypernuclei production. Phys. Rev. C
**2020**, 101, 044905. [Google Scholar] [CrossRef] - Gläßel, S.; Kireyeu, V.; Voronyuk, V.; Aichelin, J.; Blume, C.; Bratkovskaya, E.; Coci, G.; Kolesnikov, V.; Winn, M. Cluster and hypercluster production in relativistic heavy-ion collisions within the parton-hadron-quantum-molecular-dynamics approach. Phys. Rev. C
**2022**, 105, 014908. [Google Scholar] [CrossRef] - Gertsenberger, K.; Merts, S.; Rogachevsky, O.; Zinchenko, A. Simulation and analysis software for the NICA experiments. Eur. Phys. J. A
**2016**, 52, 214. [Google Scholar] [CrossRef]

**Figure 2.**Specific energy loss, $dE/dx$, in the TPC gas (

**left**) and mass-squared (divided by ${q}^{2}$) distributions as a function of rigidity, p/q, (

**right**) in Bi+Bi collisions. Red lines indicate the $3\sigma $ selection bands. See text for details.

**Figure 3.**

**Left**: invariant mass distribution for (${}^{3}$He,${\pi}^{-}$) pairs in the transverse momentum interval ${p}_{T}=2.0-2.5$ GeV/c. Blue symbols indicate the reconstructed data, while the red line shows a fit to a sum of a Gaussian and a polynomial.

**Right**: the overall reconstruction efficiency for hypertritons in transverse momentum intervals.

**Figure 4.**A reconstructed transverse momentum spectrum of hypertritons (red triangles) together with the initial p${}_{T}$-distribution from the model (blue squares).

**Figure 5.**

**Left**: invariant mass spectrum of (${}^{3}$He,${\pi}^{-}$) pairs in the proper time interval 0.1–0.3 ns.

**Right**: proper time distribution of hypertritons with the fit (2) to extract the lifetime parameter (solid line). The reconstructed data are shown by solid symbols, and the blue histogram shows the model predictions. The ’pl’ denotes the lifetime parameter.

**Figure 6.**Invariant mass distribution for (${}^{4}$He,${\pi}^{-}$) pairs (

**left**) and for the combination of ${}^{3}$He, proton, and ${\pi}^{-}$ (

**right**). The blue symbols indicate the reconstructed data, while the red line shows a fit by a sum function of a Gaussian and a polynomial.

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**MDPI and ACS Style**

Kolesnikov, V.; Kireyeu, V.; Mudrokh, A.; Vasendina, V.; Zinchenko, A.
Feasibility Study of Hypernucleus Production at NICA/MPD. *Physics* **2023**, *5*, 391-397.
https://doi.org/10.3390/physics5020028

**AMA Style**

Kolesnikov V, Kireyeu V, Mudrokh A, Vasendina V, Zinchenko A.
Feasibility Study of Hypernucleus Production at NICA/MPD. *Physics*. 2023; 5(2):391-397.
https://doi.org/10.3390/physics5020028

**Chicago/Turabian Style**

Kolesnikov, Vadim, Viktar Kireyeu, Alexander Mudrokh, Veronika Vasendina, and Alexander Zinchenko.
2023. "Feasibility Study of Hypernucleus Production at NICA/MPD" *Physics* 5, no. 2: 391-397.
https://doi.org/10.3390/physics5020028