Abstract
We study the electric dipole polarizability in Pb based on the predictions of a large and representative set of relativistic and nonrelativistic nuclear mean-field models. We adopt the droplet model as a guide to better understand the correlations between and other isovector observables. Insights from the droplet model suggest that the product of and the nuclear symmetry energy at saturation density is much better correlated with the neutron skin thickness of Pb than the polarizability alone. Correlations of with and with the symmetry energy slope parameter suggest that is a strong isovector indicator. Hence, we explore the possibility of constraining the isovector sector of the nuclear energy density functional by comparing our theoretical predictions against measurements of both and the parity-violating asymmetry in Pb. We find that the recent experimental determination of in Pb in combination with the range for the symmetry energy at saturation density MeV suggests and MeV.
- Received 17 July 2013
DOI:https://doi.org/10.1103/PhysRevC.88.024316
©2013 American Physical Society