Sensitivity of the electric dipole polarizability to the neutron skin   thickness in ${}^{208}$Pb
  The static dipole polarizability, $\alpha_{\rm D}$, in ${}^{208}$Pb has been recently measured with high-resolution via proton inelastic scattering at the Research Center for Nuclear Physics (RCNP). This observable is thought to be intimately connected with the neutron skin thickness, $r_{\rm skin}$, of the same nucleus and, more fundamentally, it is believed to be associated with the density dependence of the nuclear symmetry energy. The impact of $r_{\rm skin}$ on $\alpha_{\rm D}$ in ${}^{208}$Pb is investigated and discussed on the basis of a large and representative set of relativistic and non-relativistic nuclear energy density functionals (EDF). 
X. Roca-Maza, B. K. Agrawal, G. Colo', W. Nazarewicz, N. Paar, J.   Piekarewicz, P.-G. Reinhard and D. Vretenar
nucl-th