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Hyperon-nucleon interaction at next-to-leading order in chiral effective field theory
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Hyperon-nucleon interaction at next-to-leading order in chiral effective field theory
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Results for the Lambda N and Sigma N interactions obtained at next-to-leading order in chiral effective field theory are reported. At the order considered there are contributions from one- and two-pseudoscalar-meson exchange diagrams and from four-baryon contact terms without and with two derivatives. SU(3) flavor symmetry is imposed for constructing the hyperon-nucleon interaction while the explicit SU(3) symmetry breaking by the physical masses of the pseudoscalar mesons (pi, K, eta) is taken into account. An excellent description of the hyperon-nucleon system can be achieved at next-to-leading order. It is on the same level of quality as the one obtained by the most advanced phenomenological hyperon-nucleon interaction models.
Forward citations
Cited by 2 Pith papers
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From hyperon--nucleon interactions to deuteron--hyperon femtoscopy
Folded HAL-QCD potentials yield no dY bound states but a large dΛ scattering length and strong low-k correlation enhancement, with feed-down from Σ and Ξ clearly reshaping the observed dΛ signal.
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Isospin-breaking effects on the threshold cusp structures in $\Lambda N$-$\Sigma N$ scattering
Isospin breaking splits threshold cusps in ΛN-ΣN scattering into constrained structures whose relative sharpness or type can change, as shown via K-matrix classification and N²LO chiral EFT calculations.
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