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ΛΛ and NΞ interactions from lattice QCD near the physical point
- Source :
- Nuclear Physics A. 998:121737
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- The S-wave ΛΛ and NΞ interactions are studied on the basis of the (2+1)-flavor lattice QCD simulations close to the physical point ( m π ≃ 146 MeV and m K ≃ 525 MeV ). Lattice QCD potentials in four different spin-isospin channels are extracted by using the coupled-channel HAL QCD method and are parametrized by analytic functions to calculate the scattering phase shifts. The ΛΛ interaction at low energies shows only a weak attraction, which does not provide a bound or resonant dihyperon. The NΞ interaction in the spin-singlet and isospin-singlet channel is most attractive and lead the NΞ system near unitarity. Relevance to the strangeness = −2 hypernuclei as well as to two-baryon correlations in proton-proton, proton-nucleus and nucleus-nucleus collisions is also discussed.
- Subjects :
- Physics
Quantum chromodynamics
Nuclear and High Energy Physics
Particle physics
Basis (linear algebra)
Unitarity
010308 nuclear & particles physics
Scattering
High Energy Physics::Lattice
High Energy Physics::Phenomenology
Nuclear Theory
Phase (waves)
Lattice QCD
Strangeness
01 natural sciences
0103 physical sciences
Nuclear Experiment
010306 general physics
Analytic function
Subjects
Details
- ISSN :
- 03759474
- Volume :
- 998
- Database :
- OpenAIRE
- Journal :
- Nuclear Physics A
- Accession number :
- edsair.doi...........035b7e5ad1afaa93192d8dc59b69f72b