Examination of the lattice QCD-motivated strong attractive $\Omega N$ potentials in the ${\Omega }^{-}np$ system

Abstract

Within the framework of the Faddeev equations in configuration space, we examine the ${\Omega }^{-}np$ system, employing strongly attractive lattice HAL QCD and Yukawa-type meson exchange potentials for the $\Omega N$ interaction. Our formalism incorporates the attractive Coulomb force between the ${\Omega }^{-}$ and proton, treating the system as three non-identical particle pairs (the $ABC$ model). In this study, we assess the impact of the Coulomb interaction on the system and compare our results with recent $\Omega NN$ ($AAC$ model) calculations obtained using various approaches. The $ABC$ model yields low-energy characteristics for the \(ΩNN\) system that differ from previous calculations. The Coulomb potential has a marginal perturbative effect on the $AAC$ system, shifting the three-body binding energy by the Coulomb energy of the two-body $BC$ subsystem, but only slightly deviating the spatial configuration from isosceles triangle symmetry. These effects are primarily driven by the strong \(ΩN\) interaction. We demonstrate that the large binding energy of the ${\Omega }^{-}np$ system arises from the short-range behavior of the $\Omega N$ potentials.

13 pages, 4 figures

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Cited by in corpus (2)

• Study of light $\varphi$-mesic nuclei with HAL QCD $\varphi N$ interactions
• Bound States of $\Omega$ Baryons in Light Nuclei