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Nuclear Theory·nucl-th

Monday·October 27, 2025

5 papers—4 primary·1 cross-listed

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  1. 01

    Paths to Superheavy Nuclei

    K. Godbey🇺🇸 · F.M. Nunes🇺🇸 · M. Albertsson🇺🇸 · K.J. Cook🇺🇸 · J.M. Gates🇺🇸 · K. Hagel🇺🇸 · K. Hagino🇯🇵 · M. Kowal🇵🇱 · Jin Lei🇨🇳 · J. Lubian🇧🇷 · A. Makowski🇵🇱 · P. McGlynn🇺🇸 and 7 other authors

    This document summarizes the discussions and outcomes of the Facility for Rare Isotope Beams Theory Alliance (FRIB-TA) topical program "The path to Superheavy Isotopes" held in June 2024 at FRIB. Its content is non-exhaustive, reflecting topics chosen and discussed by the participants. The program aimed to assess the current status of theory in superheavy nuclei (SHN) research and identify necessary theoretical developments to guide experimental programs and determine fruitful production mechanisms. This report details the intersection of SHN research with other fields, provides an overview of production mechanisms and theoretical models, discusses future needs in theory and experiment, explores other potential avenues for SHN synthesis, and highlights the importance of building a strong theory community in this area.

    nucl-thnucl-exJ.Phys.G(2025)·5 citations
  2. 02

    Short-Range Correlations and Meson-Exchage Currents in Electron and Neutrino Scattering

    Paloma R. Casale🇪🇸 · Jose E. Amaro🇪🇸

    We investigate meson-exchange currents (MEC) in the one-particle emission transverse response of nuclear matter, incorporating short-range correlations via the Bethe-Goldstone equation with a realistic nucleon-nucleon interaction. The interference between one-body and two-body currents, strengthened by the high-momentum components of correlated pairs, produces a marked enhancement of the transverse response. We also indicate how the formalism extends to neutrino scattering, where similar effects are expected to impact oscillation experiments.

    nucl-thhep-phNucl.Theor.(2025)·0 citations
  3. 03

    Three-nucleon lepton-number-violating potentials in chiral EFT and their matrix elements in light nuclei

    Graham Chambers-Wall🇺🇸 · Justin Lieffers🇺🇸 · Garrett B. King🇺🇸 · Emanuele Mereghetti🇺🇸 · Saori Pastore🇺🇸 · Maria Piarulli🇺🇸 · Robert B. Wiringa🇺🇸

    We derive the three-nucleon neutrinoless double beta decay potential in -full chiral effective field theory through next-to-next-to-next-to leading order in Weinberg's power counting. The matrix elements of the resulting operators are computed in light nuclei using Variational Monte Carlo with wave functions constructed from the Norfolk family of nuclear interactions. We find that three-nucleon corrections induce a modest quenching of the total nuclear matrix elements. We discuss model dependencies and the potential impact of these corrections on the sensitivity of experimental programs to probe lepton number violating parameters. These results provide a benchmark of many-body methods capable of reaching heavier nuclei of experimental interest.

    nucl-thPRC(2026)·6 citations
  4. 04

    Relativistic corrections for lepton-nucleus scattering in the short-time approximation

    Lorenzo Andreoli🇺🇸 · Ronen Weiss🇺🇸 · Graham Chambers-Wall🇺🇸 · Alex Gnech🇺🇸 · Saori Pastore🇺🇸 · Maria Piarulli🇺🇸 · Stefano Gandolfi🇺🇸

    We present an approach for including relativistic corrections in lepton-nucleus scattering calculations within the Short-Time Approximation (STA). Previous ab-initio studies employed electromagnetic currents expanded in powers of , where is the momentum transfer and is the nucleon mass, restricting their validity to low- kinematics. We adopt an expansion scheme that treats the initial nucleon momentum perturbatively while allowing for arbitrary momentum transfer, thereby extending the applicability of the STA to high- regimes. Additionally, we incorporate a relativistic treatment of the two-nucleon final-state energies. Calculations for He and He inclusive electron scattering cross sections show a substantial improvement over previous results, achieving good agreement with experimental data in the quasi-elastic region for both low- and high-momentum transfer.

    nucl-thPRC(2026)·0 citations
  5. 05

    Coherent elastic scattering of low energy photons by neutrons

    P.O. Kazinski🇷🇺 · A.A. Sokolov🇷🇺

    The Compton process with the initial states of photons and neutrons described by the density matrices of a general form is studied for low energies of photons. The coherent contribution to the inclusive probability to record a photon is investigated in detail. This contribution gives the hologram of the neutron one-particle density matrix. The evolution of the Stokes parameters of scattered photons is described. The susceptibility tensor of a neutron gas and a wave packet of a single neutron is obtained. The explicit expression for the photon polarization operator in the presence of free neutrons is derived. It turns out that this polarization operator possesses pole singularities in the short wavelength approximation. These singularities corresponding to the additional degrees of freedom are identified with plasmons and the respective plasmon-polaritons are described. There are eight independent plasmon-polariton modes in a neutron gas and on a single neutron wave packet. Some plasmon-polariton modes prove to be tachyonic and unstable manifesting a spontaneous generation of the magnetic field. The estimates of the parameters of the neutron gas when it becomes ferromagnetic are found. In the infrared limit, the neutron wave packet behaves in coherent Compton scattering as a point particle with dynamical magnetic moment, the additional degrees of freedom being reduced to the dynamical part of the magnetic moment.

    ↳ hep-phnucl-th2 citations

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first authorsco-authorsvia INSPIRE