Correlated $\mathrm{\Lambda }d$ pairs from the $K_{stop}^{-}A\to \mathrm{\Lambda }d{A}^{\mathrm{\prime }}$ reaction

Correlated $\mathrm{\Lambda }d$ pairs emitted after the absorption of negative kaons at rest $K_{stop}^{-}A\to \mathrm{\Lambda }d{A}^{\mathrm{\prime }}$ in light nuclei ${}^{6}Li$ and ${}^{12}C$ are studied. $\mathrm{\Lambda }$-hyperons and deuterons are found to be preferentially emitted in opposite directions. The $\mathrm{\Lambda }d$ invariant mass spectrum of ${}^{6}Li$ shows a bump whose mass is 3251$\pm$6 MeV/c${}^2$. The bump mass (binding energy), width and yield are reported. The appearance of a bump is discussed in the realm of the [$\bar{K}3N$] clustering process in nuclei. The experiment was performed with the FINUDA spectrometer at DA$\mathrm{\Phi }$NE (LNF).