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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
Summary
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.
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.
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