Nuclear theory sits at the fascinating intersection of particle physics and the forces that hold our universe together. This field explores how protons and neutrons bind inside atomic nuclei, seeking to understand the fundamental interactions that govern matter at its most dense and energetic levels. While the mathematics involved can be incredibly complex, the core questions are deeply human: how does the universe function at its smallest scales, and what happens when we push matter to its limits?

At Gist.Science, we make these cutting-edge discoveries accessible by processing every new preprint published in this category on arXiv. Our team transforms dense academic manuscripts into clear, plain-language summaries alongside detailed technical overviews, ensuring that both experts and curious readers can grasp the latest breakthroughs without getting lost in the jargon. Below are the latest papers in nuclear theory, distilled and ready for you to explore.

QCD Wehrl and entanglement entropies in a gluon spectator model at small-xx

This paper investigates the proton's Wehrl entropy using a gluon light-front spectator model based on soft-wall AdS/QCD wave functions, demonstrating how to decompose this entropy into entanglement and transverse components via a Husimi distribution derived from Wigner distributions, with numerical results for entanglement entropy showing agreement with CMS data.

Gabriel Rabelo-Soares, Reinaldo Francener, Gabriel S. Ramos, Giorgio Torrieri2026-05-07⚛️ nucl-th

The TbcT_{bc} tetraquarks near the BDˉB\bar{D} threshold

Using the dynamic diquark model with a Born-Oppenheimer potential derived from lattice QCD, this study predicts that the doubly heavy scalar tetraquark Tbc(0)T_{bc}^{(0)} lies near the BDˉB\bar{D} threshold as a potential bound state or narrow resonance, while the Tbc(1)T_{bc}^{(1)} axial-vector state is a compact SS-wave resonance situated approximately 23–28 MeV above the BDˉB^{*}\bar{D} threshold.

Halil Mutuk2026-05-07⚛️ nucl-th

Light new physics and the τ\tau lepton dipole moments: prospects at Belle II

This paper demonstrates that measurements of asymmetries in e+eτ+τe^+e^- \to \tau^+\tau^- at Belle II, particularly those arising from the imaginary parts of light new physics contributions even without electron polarization, can be interpreted as model-dependent constraints on the τ\tau lepton's dipole moments, offering a novel avenue for new physics searches using existing data.

Martin Hoferichter, Gabriele Levati2026-05-06⚛️ nucl-th

Light new physics and the τ\tau lepton dipole moments

This paper presents a comprehensive analysis of light new physics contributions to τ\tau lepton dipole moments, offering tailored interpretations of e+eτ+τe^+e^-\to\tau^+\tau^- asymmetry measurements for spin-0 and spin-1 bosons while examining their transition to the effective-field-theory limit and complementarity with other constraints, with a specific focus on a tauphilic gauge vector boson at Belle II.

Martin Hoferichter, Gabriele Levati2026-05-06⚛️ nucl-th

Comprehensive Assessment of Th3+\mathrm{Th}^{3+} Properties for Nuclear Clock and Fundamental Physics Applications

This study employs high-level relativistic coupled-cluster calculations to determine critical atomic properties of the Th3+^{3+} ion, enabling precise estimates of nuclear charge radii and moments while simultaneously revealing significant higher-order relativistic effects that are essential for advancing nuclear clock technology and fundamental physics research.

A. Chakraborty, B. K. Sahoo2026-05-06⚛️ nucl-ex

Squeezed-state radiation in shockwave scattering: QCD-Gravity double copy

This paper demonstrates that multi-gluon and multi-graviton radiation in strong field shockwave scattering can be modeled as generalized Susskind-Glogower squeezed coherent states via the QCD-Gravity double copy, revealing that large squeezing parameters in nearly minimal uncertainty configurations could produce gravitational wave quantum noise exceeding the sensitivity of current and future detectors.

Anna M. Staśto, Himanshu Raj, Raju Venugopalan2026-05-06⚛️ hep-th

Non-radial pulsations of gravitationally coupled two-fluid neutron stars in general relativity

This paper establishes a fully general relativistic framework for analyzing non-radial polar oscillations in gravitationally coupled two-fluid neutron stars by deriving the necessary perturbation equations and boundary conditions, then numerically computing mode spectra to classify fundamental and pressure modes based on their fluid character.

Ankit Kumar, Daniel A. Caballero, Hajime Sotani, Nicolás Yunes2026-05-06⚛️ gr-qc

Inclusive breakup of three-body projectiles: A unified four-body framework for pair-detected and single-particle observables

This paper presents a unified four-body DWBA framework that derives a common Hamiltonian-based description for both pair-detected and single-particle inclusive breakup channels of three-body projectiles, successfully recovering established limits like IAV and CFH while providing new diagnostic tools for cluster approximations and target excitations.

Jin Lei2026-05-06⚛️ nucl-th