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

Impact of the in-medium cross section on cluster spectra in 40,48Ca+58,64Ni{}^{40,48}\mathrm{Ca}+{}^{58,64}\mathrm{Ni} collisions at $56$ and $140$ MeV/nucleon\mathbf{\mathrm{MeV}}/\mathrm{\mathbf{nucleon}}

Using the Antisymmetrized Molecular Dynamics model to analyze transverse momentum spectra of light clusters in central 40,48Ca+58,64Ni{}^{40,48}\mathrm{Ca}+{}^{58,64}\mathrm{Ni} collisions at 56 and 140 MeV/nucleon, this study demonstrates that in-medium nucleon-nucleon scattering cross-sections experience a stronger reduction at the lower incident energy compared to the higher one.

C. K. Tam, Z. Chajecki, R. S. Wang, F. C. E. Teh, N. Ikeno, W. G. Lynch, A. Ono, M. B. Tsang, A. Anthony, S. Barlini, J. (…)2026-02-03
⚛️ nuclear theory

Model Study of Eigen-Microstate Signatures of Criticality in Relativistic Heavy-Ion Collisions

This study demonstrates that the eigen-microstate approach (EMA) serves as a robust, background-independent method for identifying critical fluctuations in relativistic heavy-ion collisions by effectively filtering non-critical correlations and capturing the fractal nature of criticality through characteristic eigenvalue patterns and finite-size scaling behaviors.

Ranran Guo, Jin Wu, Mingmei Xu, Zhiming Li, Zhengning Yin, Yufu Lin, Lizhu Chen, Yanhua Zhang, Jinghua Fu, Xiaosong Chen (…)2026-02-03
⚛️ nuclear experiments

Physics-based method for generating probability table using random-matrix approach

This paper presents a physics-based method for generating probability tables by calculating fluctuating cross sections using a Gaussian Orthogonal Ensemble SS-matrix model, validating the approach with 238^{238}U and 239^{239}Pu to show qualitative agreement with conventional Breit-Wigner formalism while accounting for statistical uncertainties and SS-matrix unitarity.

K. Fujio, T. Kawano, A. E. Lovell, D. Neudecker, N. A. W. Walton2026-02-03
⚛️ nuclear theory

Universal Relations and Correlation Analysis of Proto-Neutron Star Properties in Energy-Momentum Squared Gravity

This study investigates the macroscopic properties and universal relations of proto-neutron stars within Energy-Momentum Squared Gravity, revealing that while thermodynamic variables and the modified gravity parameter significantly alter individual stellar characteristics, the underlying correlations between these properties remain robust and largely unaffected.

Sayantan Ghosh2026-02-03
🔭 astrophysics

Exploring Radial Oscillations in Slow Stable and Hybrid Neutron Stars

This paper investigates radial oscillations in nucleonic, quarkyonic, and hybrid neutron stars by incorporating out-of-equilibrium chemical effects, revealing that this approach avoids physical singularities, elucidates dynamic mode responses, and extends stable stellar branches to accommodate higher-mass configurations like PSR J0740+6620.

Sayantan Ghosh, Sailesh Ranjan Mohanty, Tianqi Zhao, Bharat Kumar2026-02-02
⚛️ general relativity

Constraining the ff-mode oscillations frequency in Neutron Stars through Universal Relations in the realm of Energy-Momentum Squared Gravity

This study investigates the impact of Energy-Momentum Squared Gravity (EMSG) on neutron star properties across various equations of state, utilizing numerical solutions and observational constraints to determine how the theory's free parameter influences mass-radius relations, phase transitions, and the fundamental-mode (ff-mode) oscillation frequency.

Sayantan Ghosh2026-02-02