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Nuclear Theory·nucl-th

Thursday·July 30, 2026

11 papers—7 primary·4 cross-listed

All11Primary7Cross-lists4
  1. 08

    [Submitted on 28 Jul 2026] (cross-list from hep-ph)

    An Equilibrating Parton Shower for Jet Quenching and Medium Response

    Ismail Soudi🇩🇪 · Adam Takacs🇨🇭

    In the weak-coupling approach, thermalization of the quark-gluon plasma and the evolution of jet-like perturbations in the medium can be described by the same underlying QCD effective kinetic theory (EKT). In this work, we show how the EKT reduces to the standard energy-loss and angular-broadening evolution of jet-quenching in the high-energy regime, while providing a consistent description near the thermal scales. Building on this, we derive a parton shower directly from EKT that reproduces the full linearized Boltzmann equation, combining elastic and inelastic collisions to capture both hard-parton energy loss and thermal equilibration on an equal footing. This shower lets us extend EKT to inhomogeneous perturbations, connecting jet evolution to the medium's hydrodynamic response, including wakes, Mach cones, and multi-particle correlations.

    Comments:
    10 pages, 6 figures, video of the simulation is at https://youtu.be/9sLDOXvyQVs
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2607.26143 [pdf]
    1 citation
  2. 09

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

    Constraining -cluster compactness in and at TeV energies using azimuthal anisotropy

    Aswathy Menon Kavumpadikkal Radhakrishnan · Suraj Prasad · Neelkamal Mallick · Raghunath Sahoo · Gergely Gábor Barnaföldi

    Anisotropic flow in ultra-relativistic light-ion collisions is sensitive to the initial geometry of the colliding nuclei. We investigate whether elliptic flow measurements can constrain the parameters of the proposed -clustered nuclear density distributions of O and Ne at LHC energies. Using the hybrid framework IP-Glasma+MUSIC+iSS+UrQMD, we simulate OO and Ne--Ne collisions at TeV for the Woods--Saxon and -clustered configurations with varying cluster compactness. The elliptic flow coefficient is calculated in the kinematic acceptances of ALICE, CMS, and ATLAS detectors and is compared with the Run~3 OO and Ne--Ne experimental measurements. It is observed that the final-state elliptic flow is significantly sensitive to the nuclear geometry, especially in OO collisions, where different configurations lead to distinct centrality dependencies and peak positions of . By performing a systematic variation of the cluster size and inter-cluster separation in O and Ne nuclei, this work attempts to identify the cluster parameter range that provides the best agreement with the experimental data. These results show that the flow observables in TeV-energy light-ion collisions can be used to optimize the nuclear structure parameters of light nuclei.

    Comments:
    9 pages, 4 captioned figures, submitted for publication
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Theory (hep-th); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2607.26758 [pdf]
    0 citations
  3. 10

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

    Imaging non-hydrodynamic modes with jet wakes

    Aleksi Kurkela🇳🇴 · Ian Moult🇺🇸 · Alexander Soloviev🇸🇮 · Urs Achim Wiedemann🇨🇭

    While studies of ultra-relativistic heavy-ion collisions have established that the quark--gluon plasma exhibits hydrodynamic behavior, direct signatures of non-hydrodynamic modes have remained elusive, and no observable is known to be exclusively sensitive to them. Here, we show that the angular structure of the jet wake provides such a probe. In the long-wavelength limit, hydrodynamics contributes only to the lowest angular moments of the detector image of the jet wake, while higher moments directly encode microscopic non-equilibrium dynamics. The jet wake thus serves as a spectroscopic probe of the medium's non-hydrodynamic sector. We develop a general kinetic-theory framework relating the angular moments of the late-time energy flux generated by a jet to the relaxation spectrum of the collision operator. In all models considered, non-hydrodynamic modes leave distinct imprints on the higher angular moments. Our results motivate precision measurements of the higher angular moments of the negative jet wake.

    Comments:
    5 pages + appendix, 3 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2607.26851 [pdf]
    1 citation
  4. 11

    [Submitted on 29 Jul 2026] (cross-list from physics.plasm-ph)

    Rotating mirror with all-directional pinch compressions - The beauty and simplicity in controlled nuclear fusion

    Linjin Zheng

    Controlling nuclear fusion is so challenging that for decades, people have been asking: Are we closer to infinite clean energy? Upon the philosophy of beauty and simplicity, the current work points out that there can be a shortcut: the rotating mirror with detached electrodes and all-directional pinch compressions. This is based on the provisional patents filed recently by the University of Texas at Austin. The device combines the steady-state and fast processes in the two main streams of controlled nuclear fusion research: magnetic confinement fusion and inertial confinement fusion. The fuel plasma is preheated in a steady-state process in a rotating mirror with detached electrodes and then the pinch compressions in both radial and longitudinal directions are applied as the fast process. Preheating and longitudinal compression, in addition to the radial compression, significantly boost the nuclear fusion rate. Fast compression after the preheating limits the time for thermalization between ions and electrons and, therefore, minimizes the impact of electron bremsstrahlung radiation loss on ions. Based on the existing experimental results, the current method can be extrapolated to have the potential to reach or exceed the Lawson criterion for the first demonstration of the feasibility of peaceful usage of nuclear fusion energy.

    Subjects:
    Plasma Physics (physics.plasm-ph); Nuclear Theory (nucl-th)
    arXiv:
    2607.27024 [pdf]
    0 citations

Affiliations

first authorsco-authorsvia INSPIRE