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Nuclear Theory·nucl-th

Thursday·May 21, 2026

7 papers—3 primary·4 cross-listed

All7Primary3Cross-lists4
  1. 01

    [Submitted on 20 May 2026]

    Configuration-interaction time-dependent density functional theory for nuclear dynamics

    Y. P. Wang · B. Li · D. Vretenar · T. Nikšić · P. W. Zhao · J. Meng

    A configuration-interaction time-dependent density functional theory (CI-TDDFT) for nuclear dynamics is developed. In this framework, the correlated nuclear many-body wave function is expanded in terms of time-dependent many-particle configurations built from a common set of orthonormal single-particle states. The equations of motion for both the expansion coefficients and the single-particle states are derived self-consistently using the Dirac-Frenkel time-dependent variational principle. This formulation extends conventional time-dependent density functional theory (TDDFT) by incorporating configuration mixing and beyond-mean-field correlations, while preserving energy and particle-number conservation. As an illustrative application, the method is implemented using the relativistic point-coupling functional PC-PK1 in the particle-hole channel and a monopole pairing interaction in the particle-particle channel, and is applied to the study of isoscalar giant monopole resonance in Ni and Ni. Numerical tests show that both the total energy and particle number are conserved, with relative deviations within during the time evolution. Compared with conventional TDDFT, CI-TDDFT yields broader strength distributions for giant monopole resonances while keeping the main peak positions close to those from TDDFT. This broadening is associated with configuration mixing in the valence space and suggests a coupling of the monopole oscillation to additional collective degrees of freedom. These results demonstrate the potential of CI-TDDFT as a quantum, microscopic beyond-mean-field framework for nuclear dynamics.

    Comments:
    41 pages, 9 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2605.21037 [pdf]
    0 citations
  2. 02

    [Submitted on 20 May 2026]

    The quenching of the axial-vector coupling constant in -decay: joint effects from chiral two-body currents and many-body correlations

    Bin-Lei Wang · Wan-Li Lv · Li-Gang Cao · Yi-Fei Niu · Gianluca Colo · Hiroyuki Sagawa · Feng-Shou Zhang

    In nuclear -decay calculations, the axial-vector coupling constant usually needs to be quenched phenomenologically by a factor 0.75 to reproduce {the Gamow-Teller (GT) transition strengths}. We propose a novel approach to quench the GT {strength} of -decay within the microscopic random phase approximation (RPA) plus particle-vibration coupling (PVC) approach, incorporating the contributions of two-body currents (TBC) derived from chiral effective field theory (EFT). Self-consistent RPA+PVC calculations are performed in three doubly magic nuclei, Ni, Sn, and Sn, with various Skyrme energy density functionals, and the effect of TBC is evaluated by using the obtained many-body wavefunctions. A combined effects of the many-body correlations introduced by PVC and chiral TBC quench the GT strength and reproduce quantitatively experimental data without any additional adjustments. The extracted quenching factors by the present microscopic model lie in the range 0.73--0.80, which is quite close to the commonly adopted empirical value of .

    Comments:
    6 pages, 4 figures for main text; 5 pages, 2 figure for supplementary materials; comments are welcome
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2605.21218 [pdf]
    0 citations
  3. 03

    [Submitted on 20 May 2026]

    Minimal Wigner- Interaction in Microscopic Cluster Models for -Conjugate Nuclei

    Guo-Ping Li · Su-Yu Zhou · Dong Bai · Bo Zhou · Yu-Gang Ma

    We present a minimalist, symmetry-guided interaction for microscopic cluster models based on Wigner- symmetry. Retaining only an -invariant two-body attraction and a local three-body repulsion, this framework is implemented via the generator coordinate method (GCM) to describe -- scattering phase shifts, the low-lying spectrum and transition properties of , and the cluster spectrum of . We show that the long-standing structural tension between the and ground states can be mitigated within this restricted operator space without introducing additional phenomenological complexity. These results indicate that Wigner- symmetry provides an effective organizing principle for clustering, offering a more fundamental baseline for understanding complex cluster structures.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2605.21228 [pdf]
    0 citations

Affiliations

first authorsco-authorsvia INSPIRE