Year: 2013
Type: article
Abstract: Background: The calculation of the hyperon binding energy in hypernuclei is crucial to understanding the interaction between hyperons and nucleons.Purpose: We assess the relative importance of two- and three-body hyperon-nucleon force by studying the effect of the hyperon-nucleon-nucleon interaction in closed shell $\ensuremath{\Lambda}$ hypernuclei from A = 5 to 91.Methods: The $\ensuremath{\Lambda}$ binding energy has been calculated using the auxiliary field diffusion Monte Carlo method for the first time, to study light and heavy hypernuclei within the same model.Results: Our results show that including a three-body component in the hyperon-nucleon interaction leads to a saturation of the $\ensuremath{\Lambda}$ binding energy remarkably close to the experimental data. In contrast, the two-body force alone gives an unphysical limit for the binding energy.Conclusions: The repulsive contribution of the three-body hyperon-nucleon-nucleon force is essential to reproduce, even qualitatively, the binding energy of hypernuclei in the mass range considered.
Source: Physical Review C
Authors: D. Lonardoni, S. Gandolfi, F. Pederiva
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: U.S. Department of Energy
OpenAlex ID: W2319528908