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Nuclear Theory·nucl-th

Friday·May 1, 2026

14 papers—9 primary·5 cross-listed

All14Primary9Cross-lists5
  1. 10

    [Submitted on 29 Apr 2026] (cross-list from hep-ph)

    Chiral-Transport-Induced Collective Modes in Strong Magnetic Fields and Their Implications for Neutron Star Phenomenology

    Sota Hanai

    In this thesis, we study the collective modes induced by the chirality of elementary particles in magnetized media and their implications for neutron star phenomenology. We theoretically predict that the chiral magnetic wave can arise in quark matter inside neutron stars, resulting in the emergence of novel types of seismic oscillations and associated gravitational waves in the context of asteroseismology. We also investigate the response to dynamical electromagnetic fields and find that a dynamical screening, distinct from the conventional Landau damping, occurs due to the chiral anomaly.

    Comments:
    108 pages, 21 figures, PhD thesis
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
    arXiv:
    2604.27020 [pdf]
    0 citations
  2. 11

    [Submitted on 30 Apr 2026] (cross-list from physics.atom-ph)

    Hyperfine-resolved laser excitation and detection of nuclear isomer in trapped Th ions

    Wu Wang · Ke Zhang · Ke-Mi Xu · Jin-Bo Hu · Shan-Gui Zhou

    We present a comprehensive theoretical investigation of hyperfine-resolved excitation and detection of the low-energy isomeric state of Th in trapped ions. Using a quantum master equation approach, we quantitatively analyze the dependence of the isomeric population on laser linewidth, detuning, and irradiation time, showing that their proper matching is essential for efficient excitation. Going beyond earlier conceptual discussions of electronic-fluorescence-based nuclear-state detection, we propose two concrete nuclear-state detection schemes based on three hyperfine-resolved electronic fluorescence channels at 690, 984, and 1088 nm. Our quantitative analysis shows that, for 50 ions, the 690- and 984-nm scheme yields detectable photon count rates on the order of at 690 nm and at 984 nm, whereas the 1088-nm scheme achieves a detectable photon rate on the order of . By quantifying the trade-off between irradiation time and scan-step size, we show that the nuclear transition can be located within one month for a 100-MHz uncertainty using currently available vacuum-ultraviolet laser technology. These results provide practical guidance for trapped-ion spectroscopy and the development of nuclear clocks.

    Comments:
    17 Pages, 10 figures, and 4 tables
    Subjects:
    Atomic Physics (physics.atom-ph); Nuclear Theory (nucl-th); Quantum Physics (quant-ph)
    arXiv:
    2604.27614 [pdf]
    1 citation
  3. 12

    [Submitted on 30 Apr 2026] (cross-list from hep-th)

    Non-Gaussian hydrodynamic fluctuations in an expanding relativistic fluid

    Gokce Basar🇺🇸 · Shuo Song🇺🇸

    We consider non-equilibrium evolution of non-Gaussian fluctuations in a hydrodynamic system undergoing a boost-invariant expansion described by Bjorken flow. We derive the evolution equations for two- and three-point velocity correlators using the effective field theory framework and present analytical solutions for them. We show that the average Landau frame is better suited for studying non-Gaussian fluctuations of velocity when relativistic effects are important. In the Bjorken background, the average Landau frame corresponds to the density frame. We demonstrate that the three-point correlators depend nonlinearly on the non-equilibrium dynamics of the two-point functions, and exhibit non-trivial effects such as memory. The importance of these effects in the context of the search for the QCD critical point via fluctuations is discussed.

    Comments:
    23 pages, 3 figures
    Subjects:
    High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2604.27730 [pdf]
    Phys.Rev.C (2026)·1 citation
  4. 13

    [Submitted on 30 Apr 2026] (cross-list from hep-ph)

    Thermal Spectra Without Detailed Balance

    Xingjian Lu🇨🇳 · Shuzhe Shi🇨🇳

    A thermal spectrum is often taken as a signature that the emitted probe has reached detailed balance with the surrounding medium. We show that this interpretation is not generally valid by studying how the microscopic emission kernel determines the macroscopic spectrum. In dimensions, a simple thermal spectrum can be generated without probe thermalization when the relevant kernel belongs to a thermally degenerate class. A representative case is realized when the differential cross section depends on the scattering angle but carries no additional dependence on the Mandelstam variable , as in low-energy Thomson scattering. Our results provide a kernel-based criterion for distinguishing genuine probe--medium exchange equilibrium from thermal spectra produced by the structure of the emission kernel itself.

    Comments:
    6 pages, 1 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2604.27926 [pdf]
    1 citation
  5. 14

    [Submitted on 30 Apr 2026] (cross-list from hep-ph)

    Deeply virtual pion production through two-loop order

    Wen Chen🇨🇳 · Feng Feng🇨🇳 · Yu Jia🇨🇳 · Qin-Tao Song🇨🇳 · Guang Tang🇨🇳 · Zhe-Yu Wang🇨🇳

    Deeply virtual meson production (DVMP) is among the most prominent channels to extract the nucleon's generalized parton distributions (GPDs) at scattering facilities such as {\tt JLab} and the upcoming {\tt EIC/EicC} experiments, which plays a vital role in unravelling the three-dimensional internal structure of nucleon. In this work we calculate for the first time the next-to-next-to-leading order (NNLO) QCD radiative corrections to the DVP processes and in the generalized Bjorken limit , accurate at the leading twist within collinear factorization framework. The impact of the two-loop QCD corrections appears to be positive and substantial, including which considerably improves the agreement between the perturbative QCD prediction and the available {\tt JLab} data. In addition to the differential longitudinal DVP cross section, we also study the impact of the two-loop QCD corrections on the transverse single-spin asymmetries (TSSA) in some benchmark kinematics at {\tt JLab}, {\tt EIC} and {\tt EicC}.

    Comments:
    11 pages, 8 figures
    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:
    2604.28164 [pdf]
    1 citation

Affiliations

first authorsco-authorsvia INSPIRE