First branching fraction measurement of the suppressed decay ${\Xi }_c^0\to {\pi }^{-}{\Lambda }_c^{+}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +963

The ${\Xi }_c^0$ baryon is unstable and usually decays into charmless final states by the $c\to su\overline{d}$ transition. It can, however, also disintegrate into a ${\pi }^{-}$ meson and a…