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.

⚛️ nuclear experiments

Fundamental geometric limitations on disentangling nuclear-surface properties in relativistic heavy ion collisions

This paper demonstrates that the extraction of nuclear surface diffuseness from relativistic heavy ion collisions is fundamentally limited by strong geometric degeneracies between the surface parameter and intrinsic nuclear deformations, though multiparticle triangular correlations offer a more independent pathway to constrain these properties.

Hadi Mehrabpour, Behnaz Behzadmoghaddam, S. M. A. Tabatabaee Mehr, Oscar Garcia-Montero, Li Yan2026-09-02
⚛️ nuclear experiments

Locating the QCD critical point with finite-size scaling of proton cumulants

This paper analyzes net-proton cumulants in Au+Au collisions using finite-size scaling to identify a potential QCD critical point near μB≈700\mu_B \approx 700 MeV, but concludes that while the observed scaling patterns are consistent with criticality, they are not yet definitive evidence due to similar behaviors arising from non-critical dynamical simulations and experimental acceptance effects.

Agnieszka Sorensen, Paul Sorensen2026-09-01
⚛️ nuclear theory

Charmonium production in p+A collisions at SPS and FAIR energies

This paper employs the Parton-Hadron-String Dynamics (PHSD) transport approach combined with the Remler formalism to validate a consistent description of charmonium production in pp and pA collisions at SPS energies and provides theoretical predictions for yields and survival probabilities at FAIR energies, offering crucial guidance for mapping the QCD phase structure in baryon-rich matter.

Taesoo Song, Jiaxing Zhao, Joerg Aichelin, Elena Bratkovskaya2026-09-01
⚛️ nuclear theory

NS-UNO: Neutron Star EoS Inference from an Unconstrained Number of Observations

This paper introduces NS-UNO, a flexible Neural Posterior Estimation framework that combines hierarchical DeepSets and conditional normalizing flows to infer the neutron star equation of state from an unconstrained number of mass-radius observations, demonstrating robust performance across varying dataset sizes, precisions, and equation-of-state families.

Valéria Carvalho, Márcio Ferreira, Michał Bejger, Constança Providência2026-09-01
⚛️ phenomenology

CGC and saturation approach: Impact-parameter dependent model of perturbative QCD and combined HERA data

This paper presents an impact-parameter dependent perturbative QCD model based on the Color Glass Condensate framework, which successfully describes a wide range of combined HERA data at small-xx by incorporating an analytical solution to the Balitsky-Kovchegov equation and an exponential saturation momentum profile consistent with the Froissart theorem.

Michael Roa, José Garrido, Miguel Guevara2026-08-31
⚛️ phenomenology

Modified homotopy approach for diffractive production in the saturation region

This paper advances a modified homotopy approach for solving the nonlinear evolution equation governing diffractive production in deep inelastic scattering by analytically solving a simplified version with initial and boundary conditions and then applying a perturbative procedure to estimate the remaining small nonlinear corrections.

Carlos Contreras, José Garrido, Eugene Levin, Rodrigo Meneses2026-08-31