1159 papers
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.
This paper presents a precise, model-independent dispersive determination of resonance pole parameters for various mesons up to 2.02 GeV by analytically continuing forward dispersion relations and global fits to scattering data, confirming established resonances below 1.7 GeV while identifying additional poles above this threshold and illustrating that resonances do not always trace full circles in Argand diagrams.
This paper presents a comparative study of neutron star structure by contrasting a Chiral Effective Field Theory (EFT) approach with the MUSES Calculation Engine's multi-region polytropic modeling, analyzing their respective mass-radius relations, advantages, and limitations.
Using lattice Non-Relativistic QCD with dynamical staggered quarks, this study investigates the impact of isospin asymmetry on bottomonium states at near-zero temperature, revealing that the Upsilon mass increases at a high isospin chemical potential of while exhibiting non-monotonic behavior at lower values.
This study employs an expanding elliptic fire-cylinder model to successfully describe the transverse momentum spectra and elliptic flow of light hadrons produced in peripheral Au+Au collisions across the RHIC Beam Energy Scan range from 7.7 to 39 GeV.
This paper employs a diagrammatic Bogoliubov many-body perturbation theory with low-momentum interactions to calculate the Hartree shift and pairing gap in ultracold Fermi gases, successfully reproducing established weak-coupling corrections and showing reasonable agreement with experimental and quantum Monte-Carlo results near the unitary regime.
This paper explores the complementarity of parameter optimization and model bias estimation within a Bayesian framework, demonstrating their application to the INCL/ABLA high-energy spallation models to improve accuracy and precision for experimental design and data analysis.
Using a Dyson-Schwinger/Bethe-Schwinger approach, this study investigates how varying quark-antiquark interaction strengths affect the transition between chiral symmetric and broken regimes in light meson spectra, revealing that the lifting of spectral degeneracies is governed by the location of quark propagator poles relative to the Bethe-Salpeter integration domain and offering new insights into the conjectured chiral spin symmetry in QCD.
This paper proposes a thermal model incorporating a common local spin equilibrium for spin-1/2 and spin-1 particles to explain the simultaneous longitudinal polarization of hyperons and positive spin alignment of vector mesons in heavy-ion collisions, noting that while the model reproduces observed trends, it currently lacks full quantitative agreement with experimental data.
This paper introduces the Four Model Tree Ensemble (FMTE), a composite machine learning model that combines three new residual-based models with a prior model to predict nuclear binding energies with high accuracy, identifying the least-squares boosted ensemble of trees as the superior approach for interpolating and extrapolating binding energy residuals.
This study demonstrates that incorporating General Relativistic effects into core-collapse supernova models significantly enhances the efficiency of the p-process, enabling a sufficiently massive progenitor to reproduce the full range of solar system -nuclide abundances up to Pd, whereas Newtonian calculations fail to do so.