nucl-th papers | Gist.Science

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

Extracting the Central Sound Speed of Neutron Stars through Intrinsic Stellar Structure Scaling with Reduced Equation-of-State Model Dependence

By applying an intrinsic stellar-structure scaling analysis (IPAD-TOV) to a diverse set of nuclear equations of state, this study derives an equation-of-state-independent estimator that constrains the central squared sound speed of canonical neutron stars to approximately 0.52, demonstrating that common structural relations can effectively reduce model dependence in inferring core properties.

Jian-Hao Shi, Bao-Jun Cai, Yu-Gang Ma2026-10-16

⚛️ lattice

Radiative transitions of hybrid mesons

This paper calculates radiative transitions within the lowest charmonium-hybrid multiplet using a constituent gluon model based on Coulomb-gauge QCD, finding that results for $Y\to\eta_c\gamma$ and $Y\to \chi_{c0}\gamma$ agree with quenched lattice computations while the $\eta_{c1}\to J/\psi\gamma$ transition is significantly lower than lattice estimates.

Shahriyar Jafarzade, Eric S. Swanson2026-10-16

⚛️ nuclear theory

$^6$ He structure from semiclassical 3D models based on $\textit{ab initio}$ spatial correlations

This paper constructs semiclassical 3D models based on *ab initio* spatial correlations to reveal that the two valence neutrons in $^6$ He distort the $\alpha$ core into a flattened, equilateral triangle configuration, yielding geometric parameters ( $\theta_{nn} \approx 58.5^\circ$ and $r_{nn} \approx 4.12$ fm) that align with continuum-discretized coupled-channels calculations.

Mengyao Huang, Tobias Frederico, Peng Yin, James P. Vary2026-10-16

⚛️ lattice

$\mathbf{\gamma Z}$ Box at Low Energy

This paper calculates the 1-loop $\gamma Z$ box-graph correction to low-energy electron-quark scattering with non-zero masses, demonstrating that a non-zero electron mass ensures finite, cutoff-independent couplings in the effective Lagrangian and discussing the implications for determining the proton's weak charge.

Balma Duch, Pere Masjuan, Hubert Spiesberger2026-10-15

⚛️ nuclear experiments

Pion emission source shape in UrQMD Au + Au collisions at STAR energies

This paper presents a three-dimensional femtoscopic analysis of pion pairs in UrQMD-simulated Au+Au collisions at $\sqrt{s_{NN}}=3$ -- $27\,\mathrm{GeV}$ using Lévy-stable distributions to extract source parameters and their dependencies on transverse mass and collision energy, establishing a baseline for future comparisons with STAR experimental data to constrain the QCD phase diagram.

Matyas Molnar, Daniel Kincses, Yan Huang, Mate Csanad2026-10-15

⚛️ nuclear theory

R-process nuclei in the rare-earth region above N=126 in Relativistic Hartree-Bogoliubov theory: A preponderance of shape-coexistence in nuclei

This study utilizes relativistic Hartree-Bogoliubov theory to investigate nuclei beyond N=126, revealing that shape coexistence and enhanced stability in the neutron-rich region significantly influence the r-process nucleosynthesis and shift the neutron drip line.

M. M. Sharma2026-10-15

⚛️ nuclear theory

Evolution of multihadron fragmentation functions with nonperturbative behavior

This paper presents a method for evolving collinear multihadron fragmentation functions that accounts for simultaneous invariant mass scales by separating extra-scale dependence, thereby unifying perturbative and nonperturbative treatments to better reveal intrinsic partonic structures.

K. Makino, T. C. Rogers2026-10-15

⚛️ nuclear theory

Spectral function approach in NuWro: modeling of multinucleon final states in quasielastic scattering

This paper presents an updated implementation of the spectral function approach in the NuWro Monte Carlo generator that consistently models multinucleon final states in quasielastic scattering, demonstrating significantly improved agreement with MicroBooNE neutrino cross-section data compared to previous models.

Artur M. Ankowski, Rwik Dharmapal Banerjee, Jan T. Sobczyk, José L. Bonilla, Krzysztof M. Graczyk, Beata E. Kowal, Heman (…)2026-10-14

⚛️ nuclear theory

Generalized Beth--Uhlenbeck entropy formula from the $Φ-$ derivable approach

This paper derives a generalized Beth-Uhlenbeck entropy formula for dense fermion systems with strong correlations using the $\Phi$ -derivable approach, extending the formalism beyond the low-density limit to include bound states, scattering states, and Mott dissociation while revealing a unique "squared Lorentzian" spectral density shape near the mass shell.

David Blaschke, Gerd Röpke, Gordon Baym2026-10-14

⚛️ nuclear theory

Many-body effects on dense matter with hyperons at finite temperature

This paper presents the first extension of the Many-Body Forces Model to finite temperature, exploring how different hyperon coupling schemes and many-body force parameters affect the equation of state and mass-radius relations of neutron and protoneutron stars, with results made available for astrophysical simulations.

Rafael Bán Jacobsen, Ricardo Luciano Sonego Farias, Veronica Dexheimer2026-10-14

← Previous Next →

nucl-th

Extracting the Central Sound Speed of Neutron Stars through Intrinsic Stellar Structure Scaling with Reduced Equation-of-State Model Dependence

Radiative transitions of hybrid mesons

6^66He structure from semiclassical 3D models based on ab initio\textit{ab initio}ab initio spatial correlations

γZ\mathbf{\gamma Z}γZ Box at Low Energy

Pion emission source shape in UrQMD Au + Au collisions at STAR energies

R-process nuclei in the rare-earth region above N=126 in Relativistic Hartree-Bogoliubov theory: A preponderance of shape-coexistence in nuclei

Evolution of multihadron fragmentation functions with nonperturbative behavior

Spectral function approach in NuWro: modeling of multinucleon final states in quasielastic scattering

Generalized Beth--Uhlenbeck entropy formula from the Φ−Φ-Φ−derivable approach

Many-body effects on dense matter with hyperons at finite temperature

$^6$ He structure from semiclassical 3D models based on $\textit{ab initio}$ spatial correlations

$\mathbf{\gamma Z}$ Box at Low Energy

Generalized Beth--Uhlenbeck entropy formula from the $Φ-$ derivable approach