Scalar Lambda N and Lambda Lambda interaction in a chiral unitary approach

Abstract

We study the central part of Lambda N and Lambda Lambda potential by considering the correlated and uncorrelated two-meson exchange besides the omega exchange contribution. The correlated two-meson is evaluated in a chiral unitary approach. We find that a short range repulsion is generated by the correlated two-meson potential which also produces an attraction in the intermediate distance region. The uncorrelated two-meson exchange produces a sizeable attraction in all cases which is counterbalanced by omega exchange contribution.

15 pages, 12 figures

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• Density-dependent effective baryon-baryon interaction from chiral three-baryon forces
• Scattering of decuplet baryons in chiral effective field theory
• Two-pion-exchange in the non-mesonic weak decay of $\Lambda$-hypernuclei
• Production of multi-strangeness hypernuclei and the YN-interaction
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• The Baryon-Baryon Interaction in the Large-$N_c$ Limit
• Radiative decays of the $\Omega (2012)$ as a hadronic molecule
• The $\Sigma \Sigma$ interactions in finite-density QCD sum rules
• A generalized Higgs potential with two degenerate minima for a dark QCD matter scenario
• $\Xi NN$ three-baryon force from SU(3) chiral effective field theory: A femtoscopic study