Towards the improvement of spin-isospin properties in nuclear energy density functionals

21st International School on Nuclear Physics and Applications & International Symposium on Exotic Nuclei

Roca-Maza, X.^1 ; Col, G.^1 ; Liang, H.Z.^2 ; Meng, J.^3,4,5 ; Ring, P.^3,6 ; Sagawa, H.^2,7 ; Zhao, P.W.^3

Dipartimento di Fisicà, Università degli Studi di Milano and INFN, Sezione di Milano, via Celoria 16, Milano

I-20133, Italy^1

RIKEN, Nishina Center, Wako

351-0198, Japan^2

State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing

100871, China^3

School of Physics and Nuclear Energy Engineering, Beihang University, Beijing

100191, China^4

Department of Physics, University of Stellenbosch, Stellenbosch

7602, South Africa^5

Physik Department, Technische Universität München, Garching

D-85747, Germany^6

Center for Mathematics and Physics, University of Aizu, Aizu-Wakamatsu, Fukushima

965-8580, Japan^7

关键词: Covariant;    Effective interactions;    Energy density;    Ground state properties;    Isospin;    Lagrangian;    Model-based OPC;    Nonlocal;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/724/1/012041/pdf
DOI  :  10.1088/1742-6596/724/1/012041

来源: IOP

【 摘 要 】

We address the problem of improving existing nuclear Energy Density Functionals (EDFs) in the spin-isospin channel. For that, we propose two different ways. The first one is to carefully take into account in the fitting protocol some of the key ground state properties for an accurate description of the most studied spin-isospin resonances: the Gamow-Teller Resonance (GTR) [1]. The second consists in providing a strategy to build local covariant EDF keeping the main features from their non-local counterparts [2]. The RHF model based on a Lagrangian where heavy mesons carry the nuclear effective interaction have been shown to be successful in the description of spin-isospin resonances [3].