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izvor podataka: crosbi

Covariance analysis for energy density functionals and instabilities (CROSBI ID 223255)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Roca-Maza, Xavier ; Paar, Nils ; Colo, Gianluca Covariance analysis for energy density functionals and instabilities // Journal of physics. G, Nuclear and particle physics, 42 (2015), 3; 034033-1-034033-14. doi: 10.1088/0954-3899/42/3/034033

Podaci o odgovornosti

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

engleski

Covariance analysis for energy density functionals and instabilities

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.

covariance analysis; energy density functional

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Podaci o izdanju

42 (3)

2015.

034033-1-034033-14

objavljeno

0954-3899

10.1088/0954-3899/42/3/034033

Povezanost rada

Fizika

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