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Predictions for the strangeness S=-3 and -4 baryon-baryon interactions in chiral effective field theory
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The leading order strangeness S=-3 and -4 baryon-baryon interactions are analyzed within chiral effective field theory. The chiral potentials consist of contact terms without derivatives and of one-pseudoscalar-meson exchanges. Assuming SU(3) flavor symmetry those contact terms and the couplings of the pseudoscalar mesons to the baryons are related to the corresponding quantities of the S=-1 hyperon-nucleon channels. Specifically, the values of the pertinent five low-energy constants related to the contact terms are already fixed from our preceeding study of the Lambda-N and Sigma-N systems and thus genuine predictions for the Xi-Lambda, Xi-Sigma, and Xi-Xi interactions can be made. Strong attraction is found in some of the S=-3 and -4 channels, suggesting the possible existence of bound states.
Forward citations
Cited by 2 Pith papers
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Symmetry Energy Expansion with Strange Dense Matter
A redefinition of the symmetry energy expansion that incorporates finite strangeness consistent with SU(3) flavor symmetry and remains valid beyond typical neutron-star central densities.
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Perspectives for hyperon and hypernuclei physics
Hypernuclei are reviewed as key probes of the strong interaction, with upcoming experiments and higher-order theory expected to resolve the hypertriton binding energy and charge symmetry puzzles.
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