The nonmesonic decay of the hypertriton is calculated based on a hypertriton wave function and $3N$ scattering states, which are rigorous solutions of three-body Faddeev equations using realistic $\mathrm{NN}$ and hyperon-nucleon interactions. The pion exchange together with heavier meson exchanges for the $\Lambda N\to \mathrm{NN}$ 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.

• Received 4 December 1996

DOI:https://doi.org/10.1103/PhysRevC.55.2196