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

Abstract

Correlated $\Lambda d$ pairs emitted after the absorption of negative kaons at rest $K_{stop}^{-}A\to \Lambda d{A}^{\prime }$ in light nuclei ${}^{6}Li$ and ${}^{12}C$ are studied. $\Lambda$-hyperons and deuterons are found to be preferentially emitted in opposite directions. The $\Lambda d$ 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$] clustering process in nuclei. The experiment was performed with the FINUDA spectrometer at DA$\Phi$NE (LNF).

13 pages, 5 figures, accepted for publication in Phys. Lett. B

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