Many-particle leptonic decays of hypernuclei

Leptonic decays of light hypernuclei of the type /sup A/X/sub Λ/→/sup A/-1X+p+l-+nu-bar occurring with a fairly large energy release (compared to π- meson decays) are studied. The energy and angular distributions of the decay products are calculated taking into account the strong interaction in the final state in the p-/sup A/-1X system and also the Pauli principle. The study is carried out for different sets of the kinematic variables describing decays of this type. It is shown that the effect of the final-state interaction significantly determines the energy distributions of the interacting particles and weakly affects the analogous lepton distributions in decays of this type. It is shown that it is necessary to take this effect into account in analyzing other types of hypernuclear decays with a similar energy release, namely, mesonless decays