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Nuclear Theory·nucl-th

Thursday·December 11, 2025

8 papers—4 primary·4 cross-listed

All8Primary4Cross-lists4
  1. 05

    [Submitted on 9 Dec 2025] (cross-list from hep-ph)

    Dispersive determination of resonances from scattering data

    José Ramón Peláez🇪🇸 · Pablo Rabán🇪🇸 · Jacobo Ruiz de Elvira🇪🇸

    We provide a precise, model- and parametrization-independent dispersive determination of the , , , , , , , and resonance pole parameters. They are obtained from the analytic continuation, by means of continued fractions, of forward dispersion relations, whose input is a recent global dispersive analysis of scattering data. From this dispersive study, we find no indications of other resonant poles below 1.7 GeV. Beyond this energy, we also provide resonance pole parameters from the direct analytic continuation of Global Fits to the three existing incompatible datasets. Depending on the dataset we find poles for the , , , , and resonances. We also present the Argand diagrams of these Global Fits and illustrate that each resonance does not necessarily have to trace a full circle in the diagram.

    Comments:
    27 pages, 16 figures. v2: matches published version in Phys. Rev. D
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    2512.09033 [pdf]
    PRD(2026)·8 citations
  2. 06

    [Submitted on 9 Dec 2025] (cross-list from hep-ph)

    System Energies for Pentaquark Family Using Thomas-Fermi Quark Model

    Suman Baral🇺🇸 · Bipin Aryal🇳🇵 · Mohan Giri🇺🇸 · Artem Denisenkoa🇺🇸 · Gopi Chandra Kaphle🇳🇵 · Walter Wilcox🇺🇸

    This study calculates the system energies of families of pentaquarks, , starting from 5 quarks up to 70 using Thomas-Fermi statistical quark model. The model assumes spherical symmetry with the particles continuously distributed with varying densities and boundaries. The particles interact with Coulombic forces and a discontinuity in the light quark density function is energetically favored. Total energies of the system are calculated for each multiquark system and compared to determine family stability characteristics. A remarkable stability for multiquark combinations with multiples of four pentaquarks, which we term an icosaquark, is identified. The first icosaquark system is found to have lowest energy per quark, suggesting stability of a system consisting of four charm, four anticharm and twelve light quarks.

    Comments:
    33 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2512.09099 [pdf]
    0 citations
  3. 07

    [Submitted on 9 Dec 2025] (cross-list from hep-ph)

    Insights into Nucleon Resonances via Continuum Schwinger Function Methods

    Peng Cheng🇨🇳 · Langtian Liu🇨🇳 · Ya Lu🇨🇳 · Craig D. Roberts🇨🇳

    The first baryon resonance was discovered in the early 1950s. The Roper resonance joined the collection ten years later. Today, many baryon resonances are known and more are being discovered. As baryons, these states are the most fundamental three-body systems in Nature. They must all be understood, not just the isolated ground state nucleon. This contribution sketches applications of continuum Schwinger function methods to the baryon resonance problem. Whilst spectroscopy is of value, particular emphasis is placed on resonance electroproduction because transition form factors extracted from electroproduction data provide a keen tool for revealing resonance structure.

    Comments:
    24 pages, 10 figures. To appear in a special issue of Acta Physica Polonica B, which celebrates the 90th birthday of L. David Roper
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2512.09160 [pdf]
    Acta Phys.Polon.B(2026)·3 citations
  4. 08

    [Submitted on 10 Dec 2025] (cross-list from cond-mat.quant-gas)

    Thermal liquid-gas phase transition in a quasi-one-dimensional dipolar Fermi gas

    Lanxuan Gao · Koki Takayama · Hiroyuki Tajima · Takahiro M. Doi · Haozhao Liang

    We theoretically investigate the thermodynamic properties of a quasi-one-dimensional single-component dipolar Fermi gas at finite temperatures. A self-bound fermionic droplet can be achieved by exchange correlations with long-range dipole-dipole interactions under quasi-one-dimensional confinement, where the interaction can be tuned by tilting the dipoles along the system coordinate. Using the Hartree-Fock approximation, we show how the liquid-gas phase transition occurs in this system and elucidate the finite-temperature phase structure consisting of a gas phase, liquid phase, gas-liquid coexistence phase, and spinodal phase. We also discuss its similarity to the liquid-gas phase transition in nuclear matter through a comparison with phenomenological models. By examining the experimental conditions for realizing self-bound fermionic droplets, we find that microwave-shielded fermionic polar molecules are promising candidates. Our results will be useful for an interdisciplinary understanding of self-bound fermionic matter as well as an analog quantum simulation of nuclear systems.

    Comments:
    10 pages, 7 figures
    Subjects:
    Quantum Gases (cond-mat.quant-gas); Nuclear Theory (nucl-th)
    arXiv:
    2512.09252 [pdf]
    PRA(2026)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE