Single-particle spin-orbit potentials of the Λ and Σ hyperons based on the quark-model G-matrix Original Research Article

Using the SU6 quark-model baryon-baryon interaction which was recently developed by the Kyoto-Niigata group, we calculate NN, ΛN and ΣNG-matrices in ordinary nuclear matter. Following the Scheerbaumʹs prescription, the strength of the single-particle spin-orbit potential SB is quantitatively discussed. The SΛ becomes small because of the cancellation between spin-orbit and anti-symmetric spin-orbit components. The shortrange correlation is found to further reduce SΛ.