Effects of beyond-mean-field correlations on nuclear Schiff moments

2025/07/02 by E. F. Zhou, Zhou, E. F., J. M. Yao +5 · 2 citations
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Atomic Physics (physics.atom-ph) #Atomic and Subatomic Physics Research #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Nuclear physics research studies

paper · pdf · doi:10.48550/arxiv.2507.01369

openalex publication_date 2025/07/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We compute the nuclear Schiff moments of the diamagnetic atoms ¹²⁹Xe, ¹⁹⁹Hg, and ²²⁵Ra in multireference covariant density functional theory. Beyond-mean-field correlations, arising from symmetry restoration and shape mixing, are incorporated via the generator coordinate method with projection onto states with well-defined parity, particle number, and angular momentum. Our results reveal a correlation between the contributions of nuclear intermediate states to Schiff moments and the electric dipole transition strengths from these states to the ground state. The new beyond-mean-field effects can either enhance or suppress the Schiff moments. In ²²⁵Ra, they do the latter, reducing the enhancement from octupole deformation somewhat.

Cited by

• The ²²⁹Th Isomer: Nuclear Structure, Clocks, and Tests of Fundamental Physics
• Electromagnetic and Exotic Moments in Nuclear DFT

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