2017/10/31 by R. Wirth, Roland Wirth, Robert Roth
Physics and Astronomy · #Baryon #Neutron #Nuclear physics #Nuclear physics research studies #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Strangeness #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1016/j.physletb.2018.02.021
published as Phys. Lett. B 779, 336 (2018) · 6 pages, 5 figures; accepted version
openalex publication_date 2018/02/13 · arxiv created 2018/02/28 · arxiv updated 2018/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We explore the systematics of ground-state and excitation energies in singly-strange hypernuclei throughout the helium and lithium isotopic chains — from HeΛ5 to HeΛ11 and from LiΛ7 to LiΛ12 — in the ab initio no-core shell model with importance truncation. All calculations are based on two- and three-baryon interaction from chiral effective field theory and we employ a similarity renormalization group transformation consistently up to the three-baryon level to improve the model-space convergence. While the absolute energies of hypernuclear states show a systematic variation with the regulator cutoff of the hyperon–nucleon interaction, the resulting neutron separation energies are very stable and in good agreement with available data for both nucleonic parents and their daughter hypernuclei. We provide predictions for the neutron separation energies and the spectra of neutron-rich hypernuclei that have not yet been observed experimentally. Furthermore, we find that the neutron drip lines in the helium and lithium isotopic chains are not changed by the addition of a hyperon.