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Possible Lightest Ξ Hypernucleus with Modern ΞN Interactions.

E Hiyama1, K Sasaki2, T Miyamoto3

  • 1Department of Physics, Kyushu University, Fukuoka, Japan, 819-0395 and Strangeness Nuclear Physics Laboratory, RIKEN Nishina Center, Wako 351-0198, Japan.

Physical Review Letters
|March 24, 2020
PubMed
Summary
This summary is machine-generated.

Researchers investigated Ξ-nucleus interactions, finding potential bound states in three- and four-particle systems. The NNNΞ system shows binding, suggesting new possibilities in nuclear physics.

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Area of Science:

  • Nuclear Physics
  • Particle Physics
  • Quantum Chromodynamics

Background:

  • Experimental evidence suggests an attractive Ξ-nucleus interaction.
  • Understanding hyperon-nucleon interactions is crucial for nuclear structure.

Purpose of the Study:

  • To search for bound NNΞ and NNNΞ systems.
  • To investigate the binding energies of three- and four-body systems involving Ξ hyperons.

Main Methods:

  • Utilized the AV8 nucleon-nucleon (NN) potential.
  • Employed phenomenological Nijmegen and first-principles HAL QCD ΞN potentials.
  • Calculated binding energies using a high-precision variational approach (Gaussian Expansion Method).

Main Results:

  • The NNNΞ system with quantum numbers (T=0, Jπ=1+) appears bound below the 3H/3He+Ξ threshold.
  • Binding was observed for both deep (Nijmegen potential) and shallow (HAL QCD potential) ΞN interactions.
  • Calculations were performed for three-body (d+Ξ) and four-body (NNNΞ) systems.

Conclusions:

  • The NNNΞ system is predicted to be bound, irrespective of the specific ΞN potential used.
  • This finding has significant implications for future experimental searches for hypernuclei.