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Nuclear Theory·nucl-th

Tuesday·March 24, 2026

14 papers—10 primary·4 cross-listed

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  1. 11

    [Submitted on 22 Mar 2026] (cross-list from hep-ph)

    Elastic proton-proton and pion-proton scattering in holographic QCD

    A. Watanabe🇯🇵

    The elastic proton-proton and pion-proton scattering processes are investigated in the framework of holographic QCD. Considering the Pomeron and Reggeon exchange in the Regge regime, the total and differential cross sections are calculated. In the model setup, the Pomeron and Reggeon exchange are described by the Reggeized spin-2 glueball and vector meson propagator, respectively. For the differential cross sections, contributions of the Coulomb interaction are also taken into account. Adjustable parameters involved in the model are determined with the experimental data, and it is presented that the resulting cross sections are consistent with the data in a wide kinematic region.

    Comments:
    11 pages, 7 figures, prepared for the proceedings of the XXXVII International Workshop on High Energy Physics: "Diffraction of hadrons: Experiment, Theory, Phenomenology" (HEPFT2025), 22-24 July 2025, Protvino, Russia
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2603.21023 [pdf]
    0 citations
  2. 12

    [Submitted on 23 Mar 2026] (cross-list from cond-mat.quant-gas)

    Critical dynamics of the superfluid phase transition in Model F

    Chandrodoy Chattopadhyay · Robert Maguire · Josh Ott · Thomas Schaefer · Vladimir V. Skokov

    We describe numerical simulations of the critical dynamics near the superfluid phase transition. The calculations are based on an implementation of a stochastic hydrodynamic theory known as model F in the classification of Hohenberg and Halperin. This theory is expected to describe dynamic scaling near the lambda transition in liquid He, Bose-Einstein condensation in ultracold atomic gases, and the superfluid transition in the unitary Fermi gas. Our simulation is based on a Metropolis algorithm previously applied to the critical endpoint of the liquid-gas phase transition in ordinary fluids. In the model E truncation of model F we obtain the expected dynamical exponent . We observe the emergence of a propagating second sound mode at the phase transition. The second sound diffusivity is consistent with the scaling relation , where is the correlation length and .

    Comments:
    27 pages, 10 figures
    Subjects:
    Quantum Gases (cond-mat.quant-gas); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2603.21479 [pdf]
    PRA(2026)·2 citations
  3. 13

    [Submitted on 23 Mar 2026] (cross-list from hep-ph)

    Jet quenching and its substructure dependence due to color decoherence

    Xiang-Pan Duan🇨🇳 · Lin Chen🇪🇸 · Guo-Liang Ma🇨🇳 · Carlos A. Salgado🇪🇸 · Bin Wu🇪🇸

    Motivated by color coherence and decoherence effects in the QCD medium, we propose a theoretical framework that combines vacuum-like emissions and medium-induced radiation to study jet quenching and its dependence on jet cone sizes and substructure. In our approach, a jet produced at a hard scale first undergoes vacuum-like evolution, as described by the well-established generating-function method in the double logarithmic approximation. These vacuum-like emissions generate subjets at an infrared momentum scale . Each subjet then experiences medium-induced energy loss as described by the BDMPS-Z formalism. By modeling the QCD bulk medium using OSU (2+1)-dimensional viscous hydrodynamics and treating together with the jet-quenching parameters at the initial proper time of the hydrodynamic evolution as free parameters, our approach provides a very good description of the inclusive jet modification factor for large-radius jets and its dependence on jet substructure in 0-10% PbPb collisions at , as measured by the ATLAS experiment.

    Comments:
    33 pages, 8 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2603.22014 [pdf]
    1 citation
  4. 14

    [Submitted on 23 Mar 2026] (cross-list from hep-lat)

    Exact center symmetry and first-order phase transition in QCD with three degenerate dynamical quarks

    Gergely Endrodi🇩🇪 · Guy D. Moore🇩🇪 · Adam Pieczynski🇩🇪 · Alessandro Sciarra🇩🇪

    We study QCD with three degenerate flavors of dynamical quarks using first-principles lattice simulations. For a specific choice of imaginary isospin chemical potential, this theory possesses an exact center symmetry, just like pure gauge theory. This exact symmetry is expected to be intact at low temperatures and spontaneously broken in the high-temperature regime. By analyzing the finite-size scaling of the Polyakov loop distribution, obtained with a dedicated multi-histogram approach, we demonstrate that there is a first-order deconfinement phase transition in between. Our results are obtained employing stout-smeared rooted staggered quarks at one lattice spacing. Using simulations at different quark masses we sketch the behavior of QCD in the mass-isospin chemical potential plane, shedding new light on this corner of the fundamental phase diagram of the strong interactions and the relationship between chiral symmetry breaking and deconfinement.

    Comments:
    10 pages, 13 figures
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2603.22046 [pdf]
    PRD(2026)·2 citations

Affiliations

first authorsco-authorsvia INSPIRE