# New parametrization for the nuclear covariant energy density functional with point-coupling interaction 

P. W. Zhao, 1 Z. P. Li, 1 J. M. Yao, 2 and J. Meng ∗ 1, 3, 4 

$^{1}$State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People’s Republic of China 

$^{2}$School of Physical Science and Technology, Southwest University, Chongqing 400715, People’s Republic of China 

$^{3}$School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, People’s Republic of China 

$^{4}$Department of Physics, University of Stellenbosch, Stellenbosch, South Africa 

(Dated: November 18, 2018) 

## Abstract 

A new parametrization PC-PK1 for the nuclear covariant energy density functional with nonlin- ear point-coupling interaction is proposed by fitting to observables of 60 selected spherical nuclei, including the binding energies, charge radii and empirical pairing gaps. The success of PC-PK1 is illustrated in the description for infinite nuclear matter and finite nuclei including the ground-state and low-lying excited states. Particularly, PC-PK1 provides good description for isospin depen- dence of binding energy along either the isotopic or the isotonic chains, which makes it reliable for application in exotic nuclei. The predictive power of PC-PK1 is also illustrated for the nuclear low-lying excitation states in a five-dimensional collective Hamiltonian in which the parameters are determined by constrained calculations for triaxial shapes. 

PACS numbers: 21.60.Jz, 21.30.Fe, 21.10.Dr, 21.10.Ft 

