Correlated $\Lambda t$ pairs from the absorption of $K^{-}$ at rest in light nuclei

Abstract

Novel data from the $K_{stop}^{-}A$ absorption reaction in light nuclei ${}^{6,7}$Li and ${}^9$Be are presented. The study aimed at finding $\Lambda t$ correlations. Regardless of $A$, the $\Lambda t$ pairs are preferentially emitted in opposite directions. Reaction modeling predominantly assigns to the $K_{stop}^{-}A\to \Lambda t(N)A^{\prime }$ direct reactions the emission of the $\Lambda t$ pairs whose yield is found to range from $10^{-3}$ to $10^{-4}$$/K_{stop}^{-}$. The experiment was performed with the FINUDA spectrometer at DA$\Phi$NE (LNF).

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