What type of study is this?

This is a Observational study (also classified as: In Vitro Study).

August 25, 2025

Subspace-projected multireference covariant density functional theory

Puntos clave

This method reveals significant correlations between nuclear matrix elements and excitation energies, indicating key interdependencies.
Findings show that the correlations among nuclear matrix elements and excitation energy vary significantly across different nuclei.
Application of subspace-projected covariant density functional theory improves computational efficiency in modeling nuclear states.
Implications may enable better refinement of parameters in energy density functional theory using experimental spectroscopic data.

Resumen

Multireference density functional theory (MR-DFT) has been a pivotal method for studying nuclear low-lying states and neutrinoless double-beta (0) decay. However, quantifying their theoretical uncertainties has been a significant challenge due to the computational demands. This study introduces a subspace-projected covariant density functional theory (SP-CDFT), which efficiently emulates MR-CDFT calculations for nuclear low-lying states. This approach leverages the eigenvector continuation method combined with the quantum-number projected generator coordinate method, based on a relativistic energy density functional (EDF). We apply SP-CDFT to investigate the correlations among the physical quantities of nuclear matter, nuclear low-lying spectroscopy, and the nuclear matrix elements (NMEs) of 0 decay in the two heaviest candidate nuclei. Our findings reveal generally strong correlations between the NMEs of 0 decay and the excitation energy of the 2₁^+ state, as well as the E2 transition strength, although these correlations vary significantly among nuclei. This work also paves the way for refining nuclear EDF parameters using spectroscopic data.

Me gusta

Guardar