Naslov
Covariance analysis for energy density functionals and instabilities

Autori
Roca-Maza, Xavier ; Paar, Nils ; Colo, Gianluca

Izvornik
Journal of physics. G, Nuclear and particle physics (0954-3899) 42 (2015), 3; 034033-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
covariance analysis; energy density functional

Sažetak
We present the covariance analysis of two successful nuclear energy density functionals (EDFs), (i) a non-relativistic Skyrme functional built from a zero-range effective interaction, and (ii) a relativistic nuclear EDF based on density dependent meson- nucleon couplings. The covariance analysis is a useful tool for understanding the limitations of a model, the correlations between observables and the statistical errors. We show, for our selected test nucleus Pb-208, that when the constraint on a property A included in the fit is relaxed, correlations with other observables B become larger ; on the other hand, when a strong constraint is imposed on A, the correlations with other properties become very small. We also provide a brief review, partly connected with the covariance analysis, of some instabilities displayed by several EDFs currently used in nuclear physics.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA