PaperPanorama
FAQ

Nuclear Theory·nucl-th

Friday·May 8, 2026

12 papers—4 primary·8 cross-listed

All12Primary4Cross-lists8
  1. 01

    [Submitted on 6 May 2026]

    Axial-vector Current and General Unpolarized Electroweak Single-nucleon Responses

    T. W. Donnelly🇺🇸 · Sabine Jeschonnek🇺🇸

    The present study provides an extension to our recent work on the vector (V) electromagnetic single-nucleon current and associated response functions, both for unpolarized situations and in situations where the target nucleon is polarized. Here the axial-vector (A) single-nucleon current matrix element is developed in detail and the full set of vector and axial-vector currents used to obtain the electroweak VV, AA and VA response functions. Only the unpolarized case is studied in the present work. The general forms for all of these elements are developed together with various approximation schemes in which numerical studies are provided to indicate where these approximations may be expected to be valid. The results of this work provide the basis for a deeper understanding of the roles played by the various single-nucleon form factors in weak interaction reactions on free nucleons and when using the standard ``prescription for nuclear physics'' in reactions involving nucleons in nuclei.

    Comments:
    36 pages, 12 figures; minor typos corrected in v2
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2605.05418 [pdf]
    PRC(2026)·0 citations
  2. 02

    [Submitted on 7 May 2026]

    Relativistic mean-field study of the neutron star inner crust using the asymmetric finite difference method

    Jinzhe Zhang · Hong Shen · Ying Zhang · Jinniu Hu

    The ground-state properties of neutron-rich nuclear clusters in the inner crust of neutron stars are investigated within the Wigner-Seitz approximation using a relativistic mean-field framework. The radial Dirac equations are solved with an asymmetric finite-difference scheme, by which the hermiticity is preserved and spurious states are eliminated. Calculations are performed for representative Wigner-Seitz cells employing TM1-based interactions with different symmetry-energy slope parameters , as well as a parametrization with a larger nucleon effective mass. It is found that the binding energy per nucleon decreases systematically with increasing , while a larger effective mass leads to further reduction, particularly at higher densities. Quantum shell effects, which are absent in the Thomas-Fermi approximation, give rise to oscillatory density distributions and modify neutron properties. Within the Wigner-Seitz cell, the resulting neutron root-mean-square radius and chemical potential are shown to be sensitive to both and the effective nucleon mass, underscoring their important roles in determining the microscopic structure of the neutron-star inner crust.

    Comments:
    20 pages, 2 figures, 5 tables, has been accepted by Chinese Physics C
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2605.05634 [pdf]
    CPC(2026)·0 citations
  3. 03

    [Submitted on 7 May 2026]

    Isomer depletion via nuclear excitation by inelastic electron scattering

    Ziwen Li · Jingyan Zhao · Xuyang Pu · Yuanbin Wu

    Isomer depletion via the process of nuclear excitation by inelastic electron scattering is investigated theoretically. A comprehensive study on low-energy nuclear excitations by inelastic electron scattering is performed to analyze the impact of the nuclear and ion charge, the nuclear transition energy, and the nuclear transition multipolarity on the cross section of the process. We apply the analysis to the case of isomer depletion, in which an excitation from the isomeric state to a nuclear level above the isomeric state can lead to decay to a nuclear level below the isomer itself and hence lead to the release of the energy stored in the isomer. For this purpose, the isomer depletion of , , and , which represent the most important scenarios of isomer depletion, are studied. Our results demonstrate the capability of the process of nuclear excitation by inelastic electron scattering for isomer depletion.

    Comments:
    Accepted for publication in Physical Review C
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2605.05783 [pdf]
    PRC(2026)·2 citations
  4. 04

    [Submitted on 7 May 2026]

    Probing the density dependence of nuclear symmetry energy through isospin transport in heavy-ion reactions

    S. Mallik🇮🇳 · F. Gulminelli🇫🇷 · C. Ciampi🇫🇷 · D. Gruyer🇫🇷

    The density dependence of the nuclear symmetry energy remains one of the key uncertainties in contemporary nuclear physics, with significant implications for the structure of exotic nuclei, the dynamics of heavy-ion collisions, and the properties of astrophysical objects such as neutron stars and core-collapse supernovae. However, extracting robust constraints requires observables that are minimally affected by final-state interactions and are reliably predicted by transport models. This review synthesizes recent theoretical and experimental advancements in constraining the symmetry energy by leveraging isospin diffusion in heavy-ion reactions within the Fermi energy domain. Recent results from the INDRA-FAZIA collaboration, including isospin transport ratio data, and Boltzmann-Uehling-Uhlenbeck (BUU) transport model calculations are highlighted. Confidence regions for the symmetry energy are extracted from isospin transport ratios and isospin diffusion currents by utilizing state-of-the-art nuclear functionals, including both ab initio and phenomenological approaches, with a particular focus on the density regions probed by these experiments. The resulting constraints will aid future Bayesian studies of the nuclear equation of state and contribute to a more unified understanding of dense matter in both terrestrial experiments and astrophysical environments.

    Comments:
    20 pages, 11 figures (Universe Special Issue: 10th Anniversary of Universe: Studying the Strongly Interacting Matter in Nuclear Reactions from Intermediate to Ultra-Relativistic Energies)
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2605.06138 [pdf]
    Universe(2026)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE