Study of the two-nucleon induced non mesonic weak decay with FINUDA

The latest results from the FINUDA experiment on the Non-Mesonic Weak Decay (NMWD) channels of p-shell Λ-hypernuclei are presented and discussed. Spectra of protons from NMWD were obtained for Λ5He, Λ7Li, Λ9Be, Λ11B, Λ12C, Λ13C, Λ15N and Λ16O. An estimation of the contributions of both Final State Interactions (FSI) and two-nucleon induced (2N) decay processes was performed, following a model independent approach. The previously published results are confirmed by a new analysis of the triple coincidence (π-, p, n) events.