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Nuclear Theory·nucl-th

Thursday·August 14, 2025

12 papers—5 primary·7 cross-listed

All12Primary5Cross-lists7
  1. 01

    Exact Calculation of Strongly Correlated Nucleonic Matter

    Rongzhe Hu🇨🇳 · Shaoliang Jin🇨🇳 · Xin Zhen🇨🇳 · Haoyu Shang🇨🇳 · Junchen Pei🇨🇳 · Furong Xu🇨🇳 · Francesco Marino🇩🇪

    Dense nucleonic matter is of vital importance for understanding compact stars and inferring the transition into deconfined quark phase. We present exact calculations of infinite nucleonic matter with the state-of-the-art full configuration-interaction quantum Monte Carlo method, enabling us to rigorously benchmark many-body methods and assess the degree to which the nucleonic matter is correlated. Our method has been numerically validated against exact diagonalization within a small model space. Calculations of nucleonic matter using chiral nuclear forces reveal that symmetric nuclear matter is strikingly strongly correlated, raising questions on previous calculations of nuclear matter with many-body expansion truncations and offering insights into simultaneous descriptions of finite nuclei and infinite nucleonic matter from first principles.

    nucl-thastro-ph.HEnucl-exPRL(2026)·9 citations
  2. 02

    The Quark Structure of the Nucleon and Moat Regimes in Nuclear Matter

    Theo F. Motta🇧🇷 · Gastão Krein🇧🇷

    We employ a model of nuclear structure that takes into account the quark substructure of the baryons to understand the behavior of static two-point correlation functions of meson fields in dense nuclear matter. We show that these correlation functions display ``moat'' regimes, where the inverse static correlation function is nonmonotonic in momentum space. This can have interesting consequences for the nature of nuclear matter, and it strengthens the possibility of a liquid-crystal phase for high densities.

    nucl-thhep-phPRD(2025)·4 citations
  3. 03

    The charge radii of calcium isotopes within relativistic density functional theory: nucleon's finite-size and quadrupole shape fluctuation effects

    H. H. Xie🇨🇳 · J. Li🇨🇳 · Y. L. Yang🇨🇳 · P. W. Zhao🇨🇳

    The anomaly in the charge radii of Ca isotopes has been puzzling for nuclear theory for decades. We present the first self-consistent solution to this puzzle within the density functional theory without resorting to local parameter adjustment. By taking into account both the intrinsic electromagnetic structure of nucleons and the zero-point motions of nuclear shape, which have been often neglected in previous studies, the similar charge radii of Ca and Ca as well as an inverted parabolic behavior between them are reproduced. It is found that these effects also play crucial roles in the description of the isotonic shift between the charge radii of Sn and Cd isotopes.

    nucl-thPRC(2025)·9 citations
  4. 04

    Role of two-body dissipation on the mean-field dynamics validity

    Yingge Huang🇨🇳 · Hui Wang🇨🇳 · Erxi Xiao🇨🇳 · Long Zhu🇨🇳 · Jun Su🇨🇳

    The role of two-body dissipation in nuclear reactions at energies of several times Coulomb barrier remains unclear but is crucial for understanding the mechanisms of deep-inelastic reactions. In this letter, we report a systematic analysis of two-body dissipation effects on the validity of mean-field dynamics, enabled by the TDHF-QRx approach, which incorporates the collision term via the relaxation-time approximation rather than full collision calculations. For deep-inelastic reactions, the contact time between nuclei is found to increase, resulting in changes to the reaction process and fragment properties such as scattering angles and total kinetic energy. These changes become important with the increase of reaction energy and decrease of impact parameter. We identify the range of reaction condition where two-body dissipation becomes significant, providing valuable insights for the applicability of mean-field dynamics approaches. The limitations of model, particularly those arising from the incomplete conservation of the locality of two-body dissipation within the quantum framework, are also discussed.

    nucl-thPLB(2025)·1 citation
  5. 05

    Separable character of ab initio No-Core Shell Model one-body densities

    J. Foy🇺🇸 · Ch. Elster🇺🇸 · P. Maris🇺🇸 · S.P. Weppner🇺🇸 · S.K. Bogner🇺🇸

    Motivated by recent findings on the separability of optical potentials that are derived from folding off-shell densities with off-shell nucleon-nucleon amplitudes, we study the off-shell character of one-body density matrices created within the No-Core Shell Model (NCSM). Concentrating on nuclei with a 0 ground state from He through Ca, we investigate the off-shell character of their one-body density matrices in momentum space when using the momentum transfer and the average momentum as variables. A singular value decomposition of the one-body density matrices reveals that they can be characterized by only very few terms, depending on the mass number of the nucleus. These findings are independent of the nucleon-nucleon interactions employed, as well as from computational specifics as grid spacing and size of the model space.

    nucl-thPRC(2026)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE