Effect of ΛΣ conversion on the Λ-particle binding in nuclear matter

Hyperon–nucleon interaction within chiral effective field theory revisited

“…Nevertheless, the effects due to the Λ-Σ conversion revealed by the present study are qualitatively rather similar to those reported in earlier calculations. This is true for three-and four-body systems [60,75,76] but also for the in-medium properties of the Λ hyperon [44][45][46]. Perhaps surprising at first sight, it is an indication that most interactions used in the former works captured reasonably well the bulk properties of the Y N interaction.…”

“…NSC97f is still in between NLO13 and NLO19 although the phase shift in the figure is not in complete agreement with NLO19 anymore. Nevertheless, the outcome for the single-particle potential of the Λ seems to be strongly influenced by the strength of the ΛN -ΣN coupling potential [44][45][46]. For the NLO13 interaction, the influence of the strength of the transition potential on the in-medium properties of the Λ was already discussed in detail by some of us in Ref.…”

Calculation of theHΣ4eBound State in theHHarada1 1998Phys. Rev. Lett.615680View full textAdd to dashboardCite

“…[8,9]. The coupling is expected to be one of the key elements for solving the anomalous binding energies of 4 L He, 4 L H, and 5 L He [10,11].…”

Predictions for charmed nuclei based on $Y_c N$ forces inferred from lattice QCD simulations

“…We note also that, although the Λ c N interaction with the cutoff 600 MeV is more attractive, the Λ c single-particle bound states predicted in this case are actually less bound. This is due to dispersive effects [84][85][86] in the calculation of the G-matrix which suppress the contribution from the Λ c N → Σ c N → Λ c N coupling. That coupling is significantly larger for the 600 MeV cutoff and, accordingly, likewise the reduction of the overall attraction.…”