931 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 proposes that the limited validity of standard nucleon-nucleon effective field theories arises from nonanalytic structures in the complex momentum plane, and demonstrates that introducing dimer fields to account for these singularities yields a meromorphic -matrix that enables accurate, cutoff-insensitive descriptions of low-energy scattering up to the pion production threshold.
This paper presents lattice QCD calculations of light-nuclei masses across various quark masses to establish first-principles constraints on nuclear interactions and reveals that, while quark-mass contributions to binding energy are small and additive, the dominant contribution arises from the gluonic component via the QCD trace anomaly.
This paper presents the first *ab initio* nonlocal optical potential calculations for magnesium isotopes (Mg) using the symmetry-adapted no-core shell model and multiple-scattering theory, successfully reproducing experimental data for Mg and providing parameter-free predictions for heavier isotopes that validate global models near the N=20 island of inversion while highlighting their limitations.
This paper introduces a multi-task deep neural network equipped with a novel loss function and odd-even effect incorporation to more accurately predict both nuclear fission product yields and their experimental errors in peak-shaped data compared to conventional independent learning methods.
This study employs a physics-informed machine learning framework to determine field-dependent Nambu-Jona-Lasinio model parameters, specifically the running coupling constant and quark anomalous magnetic moment, by fitting lattice QCD data to successfully reproduce the inverse magnetic catalysis effect in magnetized QCD matter.
This paper critiques a recent lattice QCD study that claims to exclude a QCD critical endpoint below MeV, arguing that the entropy-contour method used fails to directly probe critical singularities and therefore cannot provide model-independent constraints on the critical point's location.
Using chiral perturbation theory, this study identifies and characterizes two distinct types of baryonic vortices in rotating nuclear matter, demonstrating that finite-size causality constraints regularize the energy divergence of global vortices, thereby establishing them as viable topological excitations that compete energetically with local vortices.
This study utilizes the interacting boson-fermion model with configuration mixing to investigate the structural evolution of odd-mass niobium isotopes (Nb), revealing clear evidence of shape coexistence and configuration crossing near while demonstrating how the unpaired nucleon modulates the abruptness of the associated quantum phase transition.
This paper enhances the Ghent Hybrid model for single-pion production in the Delta resonance region by incorporating physical constraints such as Watson's theorem and -matrix unitarization, extending it with - and -exchange diagrams, and demonstrating significant improvements in describing the Delta peak against CLAS electroproduction data.
This paper utilizes Born-Oppenheimer Effective Field Theory and lattice QCD calculations to demonstrate that the near-degeneracy and specific decay patterns of the hidden-bottom tetraquarks and arise from the degeneracy of their underlying light degrees of freedom, identified as and adjoint mesons.