960 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 employs gauge/string duality to analyze the string configurations and Born-Oppenheimer potentials of a system, revealing that its ground state can manifest as a hadronic molecule, a tetraquark, or a superposition depending on geometry, while also deriving asymptotic energy expressions and demonstrating string tension universality for multiquark configurations.
This study utilizes the Hadron Resonance Gas model in Partial Chemical Equilibrium to analyze Au+Au collisions at RHIC energies, revealing that baryon annihilation ceases between chemical and kinetic freeze-out and demonstrating that inelastic hadronic interactions significantly shape the final hadron composition.
This paper proposes a conjectural framework where topologically nontrivial gluon knots serve as the dynamical core of baryons, unifying quark confinement via the dual Meissner effect and spontaneous chiral symmetry breaking through local chiral condensates, while extending this topological picture to the internal structure of heavy-flavor mesons.
This study calculates parity-dependent level densities for Pu across various deformations and reveals that the parity-equilibration energy is significantly reduced near the second minimum (fission isomer), indicating a faster equilibration process in that region compared to the ground-state minimum.
This study utilizes UrQMD simulations of Au+Au collisions at = 2.4 GeV to demonstrate that the choice of centrality determination method significantly impacts the extraction of the nuclear equation of state, revealing that Glauber Monte Carlo-based approaches introduce larger uncertainties than the equation of state itself, whereas geometrical interpretations remain consistent with dynamical multiplicity selection.
This paper provides a rigorous mathematical justification for the energy-independent relaxation time approximation in hard interactions, proposes a method to restore collision invariance, and elucidates how interaction types (hard versus soft) and physical parameters determine the non-analytical structures, such as hydrodynamic poles or gapless branch-cuts, in retarded correlators.
This paper challenges the common assumption that nuclear modifications do not exist in the longitudinal-transverse structure-function ratio by demonstrating theoretically and numerically that nucleon transverse motion within nuclei induces such modifications, particularly in medium- and large- regions, which are crucial for precise nucleon structure function determination and future investigations of gluon dynamics.
This paper constructs the non-derivative four-point contact interactions for octet and decuplet baryons in SU(3) Chiral Effective Field Theory up to Next-to-Leading Order, utilizing the expansion to reduce the number of independent Low-Energy Constants from 134 to 24 and deriving sum rules for and scattering to be tested by future lattice QCD results.
This study employs relativistic coupled-cluster theory to demonstrate the critical importance of triple excitations in accurately determining the electric dipole polarizabilities and quadrupole moments of clock states in singly charged alkaline-earth metal ions (Ca, Sr, and Ba), while also deriving nuclear quadrupole moments that reveal significant deviations from existing literature values.
This paper demonstrates that transverse momentum conservation is the key mechanism responsible for the breakdown of azimuthal correlation factorization in small systems, successfully explaining CMS p-Pb data and establishing a sign rule where deviations from unity alternate in sign based on harmonic order.