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The Neutron Skin of 48Ca and 208Pb: A Critical Analysis
Version 1
: Received: 9 November 2023 / Approved: 10 November 2023 / Online: 10 November 2023 (07:34:38 CET)
A peer-reviewed article of this Preprint also exists.
Sammarruca, F. The Neutron Skin of 48Ca and 208Pb: A Critical Analysis. Symmetry 2024, 16, 34. Sammarruca, F. The Neutron Skin of 48Ca and 208Pb: A Critical Analysis. Symmetry 2024, 16, 34.
Abstract
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.
Keywords
neutron skins; neutron matter; neutron density; equation of state; symmetry energy; chiral effective field theory
Subject
Physical Sciences, Nuclear and High Energy Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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