2024/11/20 by Falk Schupp, J. Pochodzalla, Schupp, Falk +11 · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Physics and Applications #Nuclear Theory (nucl-th) #Nuclear physics research studies
paper · doi:10.48550/arxiv.2411.13622
openalex publication_date 2024/11/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We propose a new method to study the evolution of the neutron periphery between different isotopes by considering antiproton--nucleus interactions close to the production threshold of ΛΛ and Σ-Λ pairs. At low energies, ΛΛ pairs are produced in p +p collisions, while Σ-Λ pairs can only be produced in p +n interactions. Within a simple geometrical picture we show that the double ratio for the production of Σ-Λ and ΛΛ pairs for two different isotopes are related to the variation of the neutron skin thickness between the two nuclei. Performing high statistics calculations with the Gießen Boltzmann--Uehling--Uhlenbeck (GiBUU) transport model for several isotope pairs covering a wide range of elements we verify a strong correlation between the double ratio from the full transport simulations and the schematic model. This correlation enables us to quantify the potential of the proposed method for precise studies of neutron skin variations in isotope chains.