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.

⚛️ lattice

On the equivalence of left-hand-cut and three-body formalisms

This paper analytically and numerically demonstrates the equivalence between the three-body formalism and the two-body left-hand cut approach for resolving exchange singularities in lattice QCD, while highlighting that exponentially suppressed finite-volume effects neglected by both methods can significantly compromise amplitude extraction at small lattice volumes.

André Baião-Raposo, Raul Briceño, Sebastian M. Dawid2026-09-03
⚛️ nuclear theory

Hydrodynamical Initial State in Small Systems From the Phase-Space Entropy

This paper proposes that the appropriate initial condition for hydrodynamic evolution in small collision systems is characterized by the Wehrl entropy derived from the coarse-grained Husimi distribution of the partonic Wigner function, thereby bridging the gap between the quantum nature of hadronic structure and the classical requirements of hydrodynamics.

Gabriel Rabelo-Soares, Gojko Vujanovic, Giorgio Torrieri2026-09-02
⚛️ nuclear theory

A NICER view of PSR J1614$-$2230: a massive and compact millisecond pulsar

Using pulse profile modeling of X-ray data from NICER, XMM-Newton, and Chandra, this study determines that the massive millisecond pulsar PSR J1614−2230 has a gravitational mass and a compact equatorial radius, favoring a configuration with two hot spots and no significant non-thermal emission.

Lucien Mauviard, Sebastien Guillot, Lami Suleiman, Yves Kini, Denis González-Caniulef, Christine Kazantsev, Pierre Stamm (…)2026-09-02
⚛️ nuclear theory

Probing Dense Nuclear Matter at Small-x: A workflow for a global analysis framework

This paper proposes a machine learning-based surrogate model to efficiently approximate the computationally intensive nonlinear QCD evolution of dipole-nucleus scattering amplitudes, thereby enabling rigorous global analyses of dense nuclear matter and small-x gluon distributions across diverse experimental datasets.

Junaid S. Khan, Rebecca L. Lustberg, Fredrick Olness, Peter Risse, Bjoern Schenke, Brandon Stevenson2026-09-02
⚛️ nuclear theory

A Data-Driven Model for rr-Process Production Patterns

This paper presents a data-driven model explaining rr-process production patterns in metal-poor stars as mixtures of two distinct components, suggesting that Pattern 2 arises from regular neutron star mergers while Pattern 1 results from a superposition of various events, thereby offering new theoretical insights into stellar classification and highlighting the need for further observational verification.

Chen-Qi Li, Yong-Zhong Qian, Axel Gross, Zewei Xiong2026-09-02
⚛️ nuclear theory

Investigating three-body resonances in ααΩ/Ωccc\alpha\alpha\Omega/\Omega_{ccc} clusters within the Ω/Ωccc9Be^{9}_{\Omega/\Omega_{ccc}}{\mathrm{Be}} nucleus

Using the Gaussian expansion and complex scaling methods with interactions derived from lattice QCD, this study predicts that the Ω\Omega baryon induces deeply bound, contracted states in Ω9Be^{9}_{\Omega}\mathrm{Be} due to strong attraction, whereas the Ωccc\Omega_{ccc} baryon yields only weakly bound or resonant states in Ωccc9Be^{9}_{\Omega_{ccc}}\mathrm{Be}, highlighting their distinct "gluelike" behaviors in exotic hypernuclei.

Hao Zhou, Xiang Liu2026-09-02
⚛️ nuclear theory

The Radius of the Neutron Star PSR J0614-3329 from NICER Data

This paper presents a NICER-based analysis of the neutron star PSR J0614-3329 that derives an equatorial circumferential radius of 9.88–12.77 km using a three-hot-spot model, while noting challenges in jointly fitting NICER and XMM-Newton data and discussing the resulting constraints on dense matter properties.

M. C. Miller, A. J. Dittmann, I. M. Holt, F. K. Lamb, C. Chirenti, Z. Arzoumanian, J. Berteaud, S. Bogdanov, K. C. Gendr (…)2026-09-02