Institute of Theoretical Physics

Chinese Academy of Sciences

State Key Laboratory of Theoretical Physics

Seminar

Title

题目

Optimizing relativistic energy density functionals: covariance analysis

Speaker

报告人

Prof. Tamara Niksic

Affiliation

所在单位

Zagreb University, Croatia

Date

日期

10:00, Sep 16 (Wednesday), 2015

Venue

地点

Conference Hall 322, ITP/理论物理所322报告厅

Abstract

摘要

The stability of model parameters for a class of relativistic energy density functionals, characterized by contact (point-coupling) effective inter-nucleon interactions and density-dependent coupling parameters, is analyzed using methods of statistical analysis. We calculate uncertainties of model parameters and correlation coefficients between parameters, and determine the eigenvectors and eigenvalues of the matrix of second derivatives of chi^2 at the minimum. This allows to examine the stability of the density functional in nuclear matter, and to deduce weakly and strongly constrained combinations of parameters. In addition, we also compute uncertainties of observables that are not included in the calculation of chi^2.

Contact Personn

所内合作者