Nuclear Theory·nucl-th

Friday·January 30, 2026

9 papers—5 primary·4 cross-listed

06
Medium separation scheme effects on the magnetized and cold two-flavor superconducting quark matter
Francisco X. Azeredo🇧🇷 · Dyana C. Duarte🇧🇷 · Ricardo L. S. Farias🇧🇷
We analyze the impact of the Medium Separation Scheme (MSS) on two-flavor color superconducting (2SC) dense quark matter under the influence of a constant external magnetic field. The effects of the proper treatment of the model divergences are examined through a comparison of different approaches, including the combined implementation of the Magnetic Field Independent Regularization (MFIR) and the MSS, as well as the standard use of smooth form factors. Our findings for the Nambu--Jona-Lasinio model emphasize the critical role of properly separating medium effects from vacuum contributions in the model. The combined MFIR-MSS scheme suppresses spurious unphysical oscillations, often misinterpreted in the literature as de Haas--van Alphen oscillations, and ensures the correct high-density behavior of the diquark condensate. Furthermore, within the MSS framework, the magnetization remains positive across the explored parameter space, in sharp contrast with the behavior obtained in the traditional approach.
↳ hep-phhep-lathep-thnucl-thPRD(2026)·4 citations
07
Nucleon axial-vector form factor and radius from radiatively-corrected antineutrino scattering data
Oleksandr Tomalak🇨🇳 · Aaron S. Meyer🇺🇸 · Clarence Wret🇬🇧 · Tejin Cai🇺🇸 · Richard J. Hill🇺🇸 · Kevin S. McFarland🇺🇸
The nucleon axial-vector form factor, $G_{A}$ , is critical to determine the electroweak interactions of leptons with nucleons. Important examples of processes influenced by $G_{A}$ are elastic (anti)neutrino-nucleon scattering and muon capture by the proton. Sparse experimental data results in a large uncertainty on the momentum dependence of $G_{A}$ and has motivated the consideration of new experimental probes and first-principles lattice quantum chromodynamics (QCD) evaluations. The comparison of new and precise theoretical predictions for $G_{A}$ with future experimental data necessitates the application of radiative corrections to experimentally-observable processes. We apply these corrections in the extraction of $G_{A}$ and the associated axial-vector radius from the recent MINERvA antineutrino-hydrogen data, compare the effects from radiative corrections to other uncertainties in neutrino scattering experiments, and discuss the comparison of lattice QCD evaluations to experimental measurements.
↳ hep-phhep-exhep-latnucl-ex+1PRD(2026)·5 citations
08
Scaling Properties of Two-Particle-Two-Hole Responses in Asymmetric Nuclei for Neutrino Scattering within the Relativistic Mean-Field Framework
V.L. Martinez-Consentino🇪🇸 · J. E. Amaro🇪🇸 · J. Segovia🇪🇸
We perform a systematic analysis of the nuclear dependence of two-particle-two-hole meson-exchange current contributions to inclusive lepton-nucleus scattering within the relativistic mean-field framework. We present microscopic calculations of nuclear responses for a set of 17 nuclei, ranging from helium to uranium, using a model with different Fermi momenta for protons and neutrons. We propose a novel scaling prescription based on the two-particle phase space and key nuclear parameters. The resulting description is accurate over a wide range of nuclear targets, with typical deviations below 10\%, and allows for a separate treatment of the different emission channels. In addition, a consistent benchmark against electron-scattering data is provided. The parametrization presented provides a practical framework for extending the responses to different nuclear targets in neutrino event generators.
↳ hep-phnucl-thUniverse(2026)·5 citations
09
The $Ω (2380)$ as a partner of the $Ω (2012)$
Yi-Yao Li🇨🇳 · Albert Feijoo🇪🇸 · Eulogio Oset🇪🇸
We present a study of the $Ω (2380)$ resonance and show that it is consistent with a dynamically generated state arising from the $K ˉ^{*} Ξ^{*}$ , $ω Ω$ , and $ϕ Ω$ interactions. In this picture, the $Ω (2380)$ is analogous to the $Ω (2012)$ , which is generated from the $K ˉ Ξ^{*}$ and $η Ω$ channels. The resulting mass, total width, and partial decay widths into the $K ˉ Ξ^{*}$ and $K ˉ^{*} Ξ$ channels are compatible with the available experimental data. We also discuss possible experimental observables that could provide further insight into the nature of this state.
↳ hep-phnucl-thPRD(2026)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE

Medium separation scheme effects on the magnetized and cold two-flavor superconducting quark matter

Nucleon axial-vector form factor and radius from radiatively-corrected antineutrino scattering data

Scaling Properties of Two-Particle-Two-Hole Responses in Asymmetric Nuclei for Neutrino Scattering within the Relativistic Mean-Field Framework

The Ω(2380) as a partner of the Ω(2012)

Affiliations

The $Ω (2380)$ as a partner of the $Ω (2012)$