Existence of aY1*Resonance at 1616 MeV

An enhancement at 1616 ± 8 MeV is observed in the $\Lambda {\pi }^{\pm }$ mass spectrum from the reaction $K^{-}n\to \Lambda {\pi }^{-}{\pi }^{-}{\pi }^{+}$ at a beam momentum of 3.9 GeV/c. This is interpreted as a resonance of width 66 ± 16 MeV and isospin one. A similar enhancement is also observed in other final states.