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 theory

Short-range correlated pairs from nucleon density profiles as a new probe of the nuclear equation of state

This paper proposes a density-overlap framework that successfully reproduces experimental Short-Range Correlation observables by linking them to nuclear density profiles, thereby establishing the proton-proton to neutron-neutron pair ratio as a novel probe for neutron-skin thickness and the nuclear equation of state.

L. Ponnath, N. Barnea, I. Korover, S. Paschalis, M. Petri, E. Piasetzky, X. Roca-Maza, S. Typel, I. Wischnevsky Shlush2026-09-30
⚛️ nuclear theory

Impact of Open Heavy-Flavour Production on nCTEQ Nuclear PDFs

The paper introduces nCTEQ26OHF, a global analysis of nuclear parton distribution functions that replaces the Crystal-Ball function with an SACOT GM-VFNS calculation for open heavy-flavor production, demonstrating that the resulting PDFs remain consistent with the standard nCTEQ26 release and confirming that open heavy-flavor data alone provides sufficient constraints.

Jan Wissmann, Tomáš Ježo, Michael Klasen, Ingo Schienbein, Hubert Spiesberger2026-09-30
⚛️ nuclear experiments

π\pi-QCD; Proposal for Experiments at the GSI Pion Beam Facility

This paper proposes a comprehensive experimental program at the GSI pion-beam facility using HADES to investigate strong QCD dynamics, baryon resonance structures, and in-medium hadron properties through exclusive pion-nucleon and pion-nucleus interactions, aiming to bridge cold and hot matter research while supporting neutrino physics and hypernuclei studies.

HADES Collaboration, R. Abou Yassine, J. Adamczewski-Musch, G. Appagere, M. Becker, A. Blanco, C. Blume, M. Bohman, Y. B (…)2026-09-30
⚛️ nuclear theory

Muon-to-positron conversion from local dimension-nine operators: pion-pole-improved nuclear multipoles

This paper initiates a systematic study of neutrinoless muon-to-positron conversion by constructing pion-pole-improved nuclear multipoles for local dimension-nine operators, deriving exact two-body nuclear tensors that account for unequal momentum transfers and form-factor arguments, and specializing the results for 0+→0+0^+\to0^+ transitions to facilitate direct contraction with charge-changing two-body transition densities.

Yi Liao, Hao-Lin Wang2026-09-30
⚛️ nuclear theory

Exterior complex scaling enables physics-informed neural networks for quantum scattering

This paper demonstrates that exterior complex scaling transforms the oscillatory boundary conditions of nuclear scattering into exponentially decaying waves, enabling physics-informed neural networks to accurately solve complex nucleon-nucleus and heavy-ion scattering problems for the first time while establishing a foundation for differentiable inverse problems in quantum reaction theory.

Jin Lei2026-09-29
⚛️ nuclear theory

Flavour current correlators and the non-Abelian hydrodynamic approximation: the charged sector

This paper demonstrates that the non-Abelian hydrodynamic description of charged flavor-current correlators in strongly-coupled dense matter remains valid in an extended regime where temperature is low but frequency and momentum are intermediate (T≪ω,k≪μT \ll \omega, k \ll \mu), and proposes a holographic product formula that accurately captures both hydrodynamic and AdS2_2 pole effects in this domain.

Thomas Apostolidis, Matti Järvinen, Elias Kiritsis, Francesco Nitti, Andrea Olzi, Edwan Préau2026-09-29
⚛️ nuclear theory

Global equilibrium at order O(ℏ2)\mathcal{O}(\hbar^2): pseudo-gauge ambiguity, Maxwell relations, and thermodynamic consistency

This paper investigates massive spin-1/2 particles in global thermodynamic equilibrium with rotation and acceleration up to order O(ℏ2)\mathcal{O}(\hbar^2), demonstrating that while global observables are pseudo-gauge independent, local quantities and thermodynamic consistency (specifically the validity of Maxwell relations) depend on the chosen pseudo-gauge, thereby favoring the kinetic-theory pseudo-gauge for applications like spin hydrodynamics.

Asaad Daher, David Wagner, Masoud Shokri, Dirk H. Rischke2026-09-29