1. Quantify correlations between the neutron skin and other quantities characterizing finite nuclei and infinite nuclear matter.
How will additional data on neutron-rich nuclei (e.g., masses) help us constraining the neutron skin?
Can one make reliable estimates of neutron-to-proton radii for open-shell nuclei, important in the context of parity violation, where deformation and pairing effects are large?
Quantify the regions of instability of the nuclear energy density functional
Is there an evidence for the isovector component of the pairing functional?

2. Correlations between observables
Witold Nazarewicz and Paul-Gerhard Reinhard
Consider an EDF described by coupling constants
The optimum
parameter set
Uncertainty in variable A:
Correlation between variables A and B:

3. Alignment of variables A and B:
=1: full alignment/correlation
=0: not aligned/statistically
independent
P. Klüpfel et al, arXi:

4. Quantities of interest…
bulk equilibrium
symmetry energy
symmetry energy
at surface density
slope of binding energy
of neutron matter
dipole polarizability
rescaled polarizabiliy

5. Correlation between observables

6. alignment with F(q) in 208Pb
The degree of alignment for various observables
highly
correlated
statistically
independent
alignment with F(q) in 208Pb

8. Survey of odd-even BE differences
Bertsch, Bertulani, Nazarewicz, Schunck, Stoitsov