1104 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 derives a general formula for the energy level contributions of nuclear tensor polarizability in two-body bound systems, demonstrating its role in mixing states with different orbital angular momenta, and specifically evaluates these effects on the hyperfine structure of P states and S-D mixing in muonic deuterium.
This paper investigates how -boson exchange and four-fermion operators influence lepton dipole moment constraints derived from asymmetry measurements, demonstrating that while these effects are small, they are crucial for precision studies and that specific loop-level observables could enable the determination of the anomalous magnetic moment even without a polarized electron beam.
This study employs an XGBoost-based machine learning framework to correct systematic deviations in theoretical nuclear fission barrier predictions, achieving high accuracy while revealing distinct physical drivers for inner versus outer barriers.
This paper demonstrates the feasibility of incorporating Fermi-Dirac statistics into boost-invariant perfect spin hydrodynamics simulations for spin-1/2 particles, revealing that while the resulting corrections are an order of magnitude smaller than spin feedback effects, the approach requires careful handling as numerical solutions can break down under extreme spin polarization.
This paper presents an exact coadjoint orbit action for multifermion systems, introduces a parametrization that enables expansion around the Fermi surface to recover various existing actions, and briefly explores formulations using phase space functions with star-products.
This paper investigates how Coulomb-driven proton shifts create a "neutron skin impurity" in that enhances the effective neutron distribution by approximately 0.052 fm in thin-skin scenarios consistent with CREX data, thereby offering a mechanism to address the CREX-PREX puzzle through IAS charge-exchange measurements.
This paper establishes a quantitative framework linking local spin polarization and quantum entanglement in two-qubit systems by deriving an upper bound on concurrence that decreases with increasing polarization, a relationship demonstrated to be saturated by pure states in high-energy processes like .
This paper employs the non-equilibrium Green function method to investigate sub-barrier photo-induced fission in U, successfully reproducing experimental cross-section data and demonstrating that the first eigenchannel dominates the fission probability, thereby providing microscopic support for the Bohr-Wheeler transition-state picture.
This paper employs nonrelativistic effective field theory to derive a weak-binding relation for the compositeness of near-threshold -wave states in systems with Coulomb plus short-range interactions, revealing that while strong Coulomb forces suppress the compositeness enhancement typical of short-range universality, weak Coulomb interactions preserve it and ensure that both near-threshold bound states and resonances remain composite-dominated.
This paper presents pQCD predictions demonstrating that high-momentum particle suppression scales with system size down to very light ion collisions like , identifying these small systems as ideal for observing QGP-induced energy loss while concluding that such mechanisms cannot explain the large elliptic flow observed in collisions.