The Neutron Skin of 48Ca and 208Pb: A Critical Analysis

Francesca Sammarruca

doi:10.20944/preprints202311.0674.v1

Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 9 November 2023 / Approved: 10 November 2023 / Online: 10 November 2023 (07:34:38 CET)

We discuss the neutron skins of 48Ca and 208Pb. We review and critically examine modern predictions and empirical constraints, with special attention to the dierent interpretations of the ndings from the PREX-II experiment and the recently reported value of the neutron skin in 48Ca extracted from the CREX experiment. We argue that, in the spirit of the ab initio philosophy, the path to understanding the behavior of dense neutron-rich matter must not circumvent fundamental nuclear forces. Based only on that argument, a thick neutron skin in 208Pb is highly unlikely.

neutron skins; neutron matter; neutron density; equation of state; symmetry energy; chiral effective field theory

Physical Sciences, Nuclear and High Energy Physics

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The Neutron Skin of ⁴⁸Ca and ²⁰⁸Pb: A Critical Analysis

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