Pion-assisted $N\hat{I}”$ and $\hat{I}”\hat{I}”$ dibaryons, and beyond

Abstract

Experimental evidence for $I(J^P)=0(3^{+})$ $\hat{I}”\hat{I}”$ dibaryon ${\mathcal{D}}_{03}(2370)$ has been presented recently by the WASA-at-COSY Collaboration. Here I review new hadronic-basis Faddeev calculations of $L=0$ nonstrange pion-assisted $N\hat{I}”$ and $\hat{I}”\hat{I}”$ dibaryon candidates. These calculations are so far the only ones to reproduce the relatively small ${\mathcal{D}}_{03}(2370)$ width of 70--80 MeV. Predictions are also given for the location and width of ${\mathcal{D}}_{30}$, the $I(J^P)=3(0^{+})$ exotic partner of ${\mathcal{D}}_{03}(2370)$. Extensions to strangeness $\mathcal{S}=-1$ dibaryons are briefly discussed.

8 pages, invited talk at the International Conference on Exotic Atoms and Related Topics - EXA2014, Vienna, Austria, Sept. 15-19, 2014; v2 matching published version