ComparativeHeΛ4−HΛ4binding energy differences for fourYNpotential models

Exact four-body calculations of the ${}_{\Lambda }{}^4{}_{}{}^{}\mathrm{He}-{}_{\Lambda }{}^4{}_{}{}^{}\mathrm{H}$ binding energy difference $\Delta B_{\Lambda }$ have been made using separable potential approximations to four of the $\mathrm{YN}$ potential models of Nagels, Rijken, and deSwart. The results indicate that two of the potential models are consistent with the $\mathrm{YN}$ charge symmetry breaking implied by the experimental $\Delta B_{\Lambda }$.