The nonmesonic weak decay of the hypertriton
  The nonmesonic decay of the hypertriton is calculated based on a hypertriton wavefunction and 3N scattering states, which are rigorous solutions of 3-body Faddeev equations using realistic NN and hyperon-nucleon interactions. The pion-exchange together with heavier meson exchanges for the $\Lambda N \to N N $ transition is considered. The total nonmesonic decay rate is found to be 0.5% of the free $\Lambda$ decay rate. Integrated as well as differential decay rates are given. The p- and n- induced decays are discussed thoroughly and it is shown that the corresponding total rates cannot be measured individually. 
J. Golak (1), K. Miyagawa (2), H. Kamada (3), H. Wita{\l}a (1), W.   Gl\"ockle (4), A. Parre\~no (5), A. Ramos (5), C. Bennh...