PaperPanorama

Nuclear Theory·nucl-th

Friday·August 28, 2026

12 papers—6 primary·6 cross-listed

All12Primary6Cross-lists6
  1. 07

    [Submitted on 26 Aug 2026] (cross-list from hep-ph)

    First-Principles Nuclear Modeling for Light Dark Matter Experiments at the Intensity Frontier

    Taylor R. Gray🇸🇪 · Alberto Scalesi🇸🇪

    Accelerator-based experiments at the intensity frontier, in which a high-energy beam impinges on a nuclear target, serve as powerful probes of the light dark matter paradigm. Such experiments require precise modeling of the target nucleus for reliable signal predictions. We present the application of a many-body ab initio method to calculate light dark matter mediator production signal rates at electron fixed-target experiments, using chiral effective field theory interactions. Considering both elastic and quasi elastic scattering, we compute cross sections using a Monte Carlo event generator implementation informed by ab initio nuclear elastic form factors and spectral functions for three representative nuclei, Ne, Si, and Fe, at varying electron beam energies. We compare our results to a commonly used phenomenological parameterization, finding an increased signal yield by up to two orders of magnitude with our quasi elastic treatment and an agreement for lighter mediators.

    Comments:
    8 pages, 5 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    2608.26255 [pdf]
    0 citations
  2. 08

    [Submitted on 26 Aug 2026] (cross-list from cond-mat.stat-mech)

    Fluctuation--response relations from an emergent symmetry in the rotating stochastic Landau model

    Dhruv Kush🇺🇸 · Nicki Mullins🇺🇸 · Mauricio Hippert🇧🇷 · Jorge Noronha🇺🇸

    In this work, we investigate the extent to which fluctuation--response relations emerge from coarse-grained stochastic dynamics alone, and which aspects instead depend on additional information about the system. To address this question, we study the rotating stochastic Landau model, an exactly solvable system describing an overdamped charged Brownian particle in a constant magnetic field, coupled dissipatively to a rotating environment, whose steady state supports circulating probability currents. Using the Martin--Siggia--Rose path integral, we show that there is an emergent symmetry transformation that implements the time-reversed dynamics and changes the action by a boundary term. Comparison with the Crooks fluctuation theorem identifies this term with the entropy associated with transitions between steady-state configurations. After coupling the theory to external sources, the same symmetry yields Ward identities relating fluctuations and response. These identities follow entirely from the coarse-grained stochastic theory and do not fix the noise strength. Finally, upon imposing the Einstein relation, we show that they coincide with the high-temperature fluctuation--dissipation relations implied by the rotating Kubo--Martin--Schwinger condition for a microscopic Gibbs ensemble.

    Subjects:
    Statistical Mechanics (cond-mat.stat-mech); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2608.26468 [pdf]
    0 citations
  3. 09

    [Submitted on 27 Aug 2026] (cross-list from hep-ph)

    Fermi gas of domain-wall Skyrmions in QCD in a strong magnetic field

    Patrick Copinger🇯🇵 · Minoru Eto🇯🇵 · Muneto Nitta🇯🇵

    Fermionic domain-wall Skyrmions arise in the chiral soliton lattice of two flavor chiral perturbation theory in a magnetic field as the ground state and are associated with baryons of the underlying theory of quantum chromodynamics. We analyze the electromagnetic screening characteristics of domain-wall Skyrmions that give insight into baryon density on the magnetic field and chemical potential phase diagram. At zero temperature, using the moduli effective theory, it is found Skyrmion density is saturated up to the Fermi momenta on the disk of the chiral soliton lattice orthogonal to the magnetic field. We further study chiral perturbation theory coupled to quantum electrodynamics leading to finite temperature screening, wherein a static fermionic domain-wall Skyrmion screening is predicted through a combined Debye mass/length.

    Comments:
    29 pages, 3 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2608.26608 [pdf]
    0 citations
  4. 10

    [Submitted on 27 Aug 2026] (cross-list from hep-ph)

    Advances in the holographic description of hot and dense QCD matter

    Nicolas Kovensky🇦🇷 · Andreas Schmitt🇬🇧

    We review and extend recent progress on QCD-like phases at nonzero temperature and chemical potentials within the gauge-gravity duality. We focus on the Witten-Sakai-Sugimoto model, a top-down approach based on string theory which allows for a unified treatment of mesons, baryons and quarks. Phases such as pion condensation, baryonic and quarkyonic matter are located in the phase diagram, and we discuss predictions as well as weaknesses and limitations of this holographic approach. One of the novelties included in this review is the first holographic construction of a pionic phase between BEC and BCS regimes, which however is found to be metastable. We also discuss future directions in holographic QCD, within the model used here and in a wider context.

    Comments:
    39 pages, 19 figures, invited review for Annals of Physics ("Quantum Phases of Strong Dynamics")
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2608.27023 [pdf]
    0 citations
  5. 11

    [Submitted on 27 Aug 2026] (cross-list from hep-ph)

    Enigmatic properties of and

    Taísa Veloso🇧🇷 · K. P. Khemchandani🇧🇷 · A. Martinez Torres🇧🇷 · Luciano M. Abreu🇧🇷 · Li-Sheng Geng🇰🇷

    Motivated by a considerable release of data on first two excited states of the doubly strange baryon, and , from different experimental collaborations in recent years, we investigate meson-baryon interactions in a coupled-channel approach. The systems are composed of pseudoscalar and vector mesons and the calculations are done for the total spin 1/2 and isospin 1/2 configuration. The tree-level interactions are deduced from Lagrangians based on chiral and hidden local symmetries. Specifically, we make an attempt to describe (1) data on the femtoscopic correlation function coming from and collisions, and (2) the available data on invariant mass distributions for different systems: , and . We find that the amplitude which yields the correlation function close to the data results in mass distributions of different meson-baryon systems that are in discordance with the experimental data and vice-versa.

    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2608.27236 [pdf]
    0 citations
  6. 12

    [Submitted on 27 Aug 2026] (cross-list from hep-ph)

    Chiral soliton lattice in inhomogeneous magnetic fields

    Tomas Brauner🇳🇴 · Ramkumar Radhakrishnan🇺🇸

    It has been known that in sufficiently strong uniform magnetic fields, the ground state of quantum chromodynamics (QCD) supports a spatially modulated condensate of neutral pions, dubbed chiral soliton lattice (CSL). In this paper, we investigate whether a similar ordered ground state might exist when the external magnetic field is nonuniform, as appropriate for potential phenomenological applications, including heavy-ion collisions and neutron stars. To that end, we use the low-energy effective field theory of QCD, restricted to the neutral pions as the sole low-energy degrees of freedom in strong magnetic fields. In the limit of vanishing pion mass, we achieve a complete characterization of magnetic fields supporting a CSL-like ground state. Moreover, for a simple but infinite family of magnetic fields, we find the corresponding CSL state analytically. Going away from the massless limit requires full numerical minimization of the energy functional. Here we provide some sample numerical results, focusing on the qualitative differences as compared to the situations with a uniform magnetic field or a vanishing pion mass. The main conclusion remains unchanged: while bending the magnetic field typically reduces the energy gain due to the neutral pion condensation, a CSL-type ground state is still possible. As a byproduct of our work, we map the location of the CSL phase in the phase diagram of QCD in a uniform magnetic field and finite volume.

    Comments:
    17 pages, 7 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2608.27319 [pdf]
    0 citations

Affiliations

first authorsco-authorsvia INSPIRE