⚛️ Category

nucl-th

1634 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.

⚛️ nuclear theory

Fano formula for resonance poles in the Jost--random-phase approximation: Breit--Wigner-type peaks, Fano dips, and Fano-type peaks in 16^{16}O and 208^{208}Pb

This paper derives a generalized Fano formula within the Jost-random-phase approximation framework to explain how interference between resonance poles and background continua produces diverse spectral patterns—including Breit-Wigner peaks, Fano dips, and Fano-type peaks—in 16^{16}O and 208^{208}Pb, demonstrating that these features depend on the alignment of transition amplitudes rather than standard collectivity indicators.

Kazuhito Mizuyama2026-10-21
⚛️ nuclear experiments

Zemach radii and nuclear structure effects in hyperfine splitting of lithium isotopes

This paper resolves the long-standing discrepancy between effective and elastic Zemach radii in lithium isotopes by demonstrating that nuclear polarizability effects, which are negligible in 7^7Li but dominant in 6^6Li, constitute the primary source of isotope-dependent nuclear corrections to hyperfine splitting in light atoms.

Yilong Yang, Evgeny Epelbaum, Chen Ji, Pengwei Zhao2026-10-20
⚛️ nuclear theory

Δ(1232)\Delta(1232) isobars and weak-interaction bulk viscosity in neutron-star merger matter

This study extends bulk viscosity calculations for neutron-star merger matter to include Δ(1232)\Delta(1232) isobars, revealing that their presence alters the charge composition to open nucleonic direct Urca processes, thereby shifting the resonant bulk viscosity maximum to lower temperatures and significantly enhancing the damping of kHz density oscillations compared to purely nucleonic matter.

Bharat Kumar2026-10-20
⚛️ nuclear theory

Neutron-star dark-matter limits measure the maximum-mass headroom

This paper demonstrates that neutron-star constraints on dark matter are not independent limits on particle physics but rather direct measurements of the "headroom" between observed pulsar masses and the theoretical maximum mass allowed by the nuclear equation of state, a relationship that holds across a wide range of models and dark-matter scenarios.

Probit J Kalita, Soham Singh, Pinku Routaray, Bharat Kumar2026-10-20
⚛️ nuclear theory

Statistical Analysis of Neutron Star Cooling: Implications for the Nuclear Equation of State and Nucleon Pairing

By statistically comparing approximately 100,000 theoretical cooling curves against observational data from 24 isolated neutron stars, this study identifies the NL3ωρ\omega\rho equation of state with neutron triplet pairing as the most consistent model, thereby providing crucial constraints on the nuclear equation of state and nucleon pairing mechanisms.

Afonso Ávila, Ricardo Z. Ferreira, Violetta Sagun2026-10-20
⚛️ nuclear theory

Hyperonic Direct-Urca Neutrino Emission with Lattice-QCD-Informed Form Factors

This study demonstrates that incorporating lattice-QCD-informed, momentum-dependent baryonic transition form factors significantly alters the direct-Urca neutrino emissivity in hyperonic neutron-star matter, particularly for hyperonic channels that sample large momentum transfers, thereby modifying the integrated neutrino luminosity of stellar configurations compared to conventional static-coupling models.

Andreas Konstantinou2026-10-20
⚛️ nuclear theory

Fluctuations of v2v_2 versus fluctuations of ε2\varepsilon_2: Beyond linear and cubic response

This paper utilizes extensive event-by-event hydrodynamic simulations to reveal that the response of elliptic flow (v2v_2) to initial anisotropy (ε2\varepsilon_2) fluctuations is significantly larger than the response to average geometry and exhibits an opposite asymmetry, deviations that cannot be explained by standard linear and cubic response models.

Andreas Kirchner, Mubarak Alqahtani, Jean-Yves Ollitrault2026-10-20