We study the 6He Borromean nucleus in coordinate representation within a three-body model with two-body potentials derived from cluster effective field theory (EFT). These potentials are originally developed in momentum space and Fourier transformed to provide nonlocal potentials in configuration space. We use hyperspherical coordinates in combination with the Lagrange-mesh technique to compute the ground state energy, root mean square radius, and the E1 strength distribution of 6He. We also introduce a three-body interaction to eliminate dependencies on the cutoff parameter of the two-body potentials on the ground state energy. The E1 strength distribution exhibits a low-lying resonance. However, it is strongly influenced by the choice of the three-body EFT interaction.
Three-body model of He6 with nonlocal halo effective field theory potentials / Pinilla, E.C., Leidemann, W., Orlandini, G., Descouvemont, P.. - In: PHYSICAL REVIEW. C. - ISSN 2469-9993. - 112:2(2025), pp. 1-11. [10.1103/kskt-7p8g]
Three-body model of He6 with nonlocal halo effective field theory potentials
W. Leidemann;G. Orlandini;
2025-01-01
Abstract
We study the 6He Borromean nucleus in coordinate representation within a three-body model with two-body potentials derived from cluster effective field theory (EFT). These potentials are originally developed in momentum space and Fourier transformed to provide nonlocal potentials in configuration space. We use hyperspherical coordinates in combination with the Lagrange-mesh technique to compute the ground state energy, root mean square radius, and the E1 strength distribution of 6He. We also introduce a three-body interaction to eliminate dependencies on the cutoff parameter of the two-body potentials on the ground state energy. The E1 strength distribution exhibits a low-lying resonance. However, it is strongly influenced by the choice of the three-body EFT interaction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
