Dipole Polarizability of Finite Nuclei as a Probe of Neutron Stars

Abstract

Nuclear ground state and collective excitation properties provide a means to probe the nuclear matter equation of state and establish connections between observables in finite nuclei and neutron stars. Specifically, the electric dipole polarizability, measured with high precision in various neutron-rich nuclei, serves as a robust constraint on the density dependence of the symmetry energy. In this Letter, we employ a class of relativistic energy density functionals in a twofold process: first, to link the electric dipole polarizability from recent experiments to the slope of the symmetry energy, and second, to translate this information into constraints on the tidal deformability and radii of neutron stars, in connection with multimessenger astrophysical observations from pulsars and binary neutron stars. We provide compelling evidence that the electric dipole polarizability represents a key nuclear observable to probe the neutron star properties. By significantly reducing the uncertainties in the mass-radius plane, our findings also align with recent multimessenger observations.

arXiv commentv1: 6 pages, 4 figures; v2: 9 pages, 5 figures, appendix, updated text and references; accepted for publication in The Astrophysical Journal Letters; v3: 9 pages, 5 figures, appendix; matched published version in The Astrophysical Journal Letters

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Cited by in corpus (1)

• Universal relation between dipole polarizability of finite nuclei and neutron-star compactness