Anchor-based optimization of energy density functionals

Abstract

A new anchor-based optimization method of defining the energy density functionals (EDFs) is proposed. In this approach, the optimization of the parameters of EDF is carried out for the selected set of spherical anchor nuclei the physical observables of which are modified by the correction function which takes into account the global performance of EDF. It is shown that the use of this approach leads to a substantial improvement in global description of binding energies for several classes of covariant EDFs. The computational cost of defining a new functional within this approach is drastically lower as compared with the one for the optimization which includes the global experimental data on spherical, transitional and deformed nuclei into the fitting protocol.

arXiv comment6 pages, 1 figure and 1 Table, in press as Letter in Phys. Rev. C. Includes "Supplemental-material.pdf" as a separate file with this submission. This file provides technical and numerical details on the anchor-based optimization method

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