Data di Pubblicazione:
2022
Citazione:
Isospin symmetry breaking in the charge radius difference of mirror nuclei / T. Naito, R. Xavier, G. Colo', H. Liang, H. Sagawa. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 106:6(2022), pp. L061306.1-L061306.6. [10.1103/physrevc.106.l061306]
Abstract:
Isospin symmetry breaking (ISB) effects in the charge radius difference Rch of mirror nuclei are studied
using the test example of 48Ca and 48Ni. This choice allows for a transparent study of ISB contributions since
pairing and deformation effects, commonly required for the study of mirror nuclei, can be neglected in this
specific pair. The connection of Rch with the nuclear equation of state and the effect of ISB on such a relation
are discussed according to an energy density functional approach. We find that nuclear ISB effects may shift the
estimated value for the symmetry energy slope parameter L by about 6 to 14 MeV while Coulomb corrections
can be neglected. ISB effects on the ground-state energy and charge radii in mirror nuclei have been recently
predicted by ab initio calculations to be relatively small, pointing to a negligible effect for the extraction of
information on the nuclear EoS. These contrasting results call for a dedicated theoretical effort to solve this
overarching problem that impacts not only the neutron-skin thickness or the difference in mass and charge radii
of mirror nuclei but also other observables such as the isobaric analog state energy.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
T. Naito, R. Xavier, G. Colo', H. Liang, H. Sagawa
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