$\pi N$ and $\pi \pi N$ Couplings of the $\Delta (1232)$ and its Chiral Partners

K. Nagata, A. Hosaka, V. Dmitrasinovic

We investigate the interactions and chiral properties of the four spin-$\thalf$-baryons : $N^{-}(D_{13})$, $N^{+}(P_{13})$, ${\Delta }^{+}(P_{33})$ and ${\Delta }^{-}(D_{33})$ together with the nucleon. W…