1301.7472 (D. Lonardoni et al.)

Role of the two- and three-body hyperon-nucleon interaction in
$Λ$-hypernuclei    [PDF]

D. Lonardoni, S. Gandolfi, F. Pederiva

We discuss the effect of the hyperon-nucleon-nucleon interaction on the binding energy of a $\Lambda$ hyperon in closed shell hypernuclei from A=5 to 91. The $\Lambda$ binding energy has been calculated using the Auxiliary Field Diffusion Monte Carlo method that we have used, for the first time, to study light and heavy hypernuclei within the same model. Our results show that including a three-body component in the hyperon-nucleon interaction leads to a saturation of the $\Lambda$ binding energy remarkably close to experimental data. In contrast, the two-body force alone gives a very unphysical binding energy.

View original: http://arxiv.org/abs/1301.7472