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Nuclear Theory·nucl-th

Monday·October 20, 2025

10 papers—7 primary·3 cross-listed

All10Primary7Cross-lists3
  1. 08

    Adiabatic hydrodynamization and quasinormal modes of nonthermal attractors

    Matisse De Lescluze🇧🇪 · Michal P. Heller🇧🇪 · Aleksas Mazeliauskas🇩🇪 · Bruno Scheihing-Hitschfeld🇺🇸 · Clemens Werthmann🇧🇪

    Nonthermal attractors govern the emergent self-similar dynamics of far-from-equilibrium quantum systems, from ultrarelativistic nuclear collisions to cold-atom experiments. Within the framework of adiabatic hydrodynamization, the approach to a nonthermal attractor is described by the decay of excited states of an effective Hamiltonian. Using an exactly solvable kinetic theory -- the longitudinally expanding, overoccupied gluon plasma dominated by small-angle elastic scattering -- we establish a direct correspondence between the eigenmodes of adiabatic hydrodynamization and the quasinormal mode spectrum of the nonthermal attractor. This equivalence suggests a general framework for identifying universal dynamical structures in nonequilibrium systems. As a byproduct, we derive analytic prescaling solutions for strongly longitudinally expanding systems.

    ↳ hep-phcond-mat.quant-gashep-thnucl-thPRL(2026)·3 citations
  2. 09

    Universal Relations for Elastic Hybrid Stars and Quark Stars

    Chun-Ming Yip🇨🇳 · Shu Yan Lau🇺🇸 · Kent Yagi🇺🇸

    Some compact stars may contain deconfined quark matter, forming hybrid stars or quark stars. If the quark matter forms an inhomogeneous condensate in the crystalline color superconducting phase, its rigidity may be high enough to noticeably alter the stellar properties. In this paper, we investigate whether these elastic stars follow the universal relations, i.e., relations insensitive to equations of state, that have been well established for fluid stars. We improve upon previous studies by allowing quark matter in the background, static, and spherically symmetric configuration to be sheared. Such background shear can be treated in the form of an effective pressure anisotropy. We then calculate the moment of inertia , tidal deformability , and spin-induced quadrupole moment of these models with pressure anisotropy. The -- universal relations for the elastic hybrid (quark) star models are valid up to a variation of , larger than that for typical fluid star models, when the maximal magnitude of quark matter shear modulus is considered in the crystalline color superconducting phase from realistic calculations. The uncertainty in universal relations related to the stellar compactness for these elastic star models, on the other hand, remain comparable to those for typical fluid star models. Our results demonstrate the validity of universal relations for hybrid stars and quark stars with a realistic degree of pressure anisotropy due to the crystalline color superconducting quark matter.

    ↳ astro-ph.HEgr-qcnucl-thPRD(2026)·1 citation
  3. 10

    Probing Composite Structure and Spin-Orbit Coupling with GPDs in He

    Antonio Garcia Vallejo🇺🇸 · Matthew D. Sievert🇺🇸

    In this work, we extend the Impulse Approximation for the generalized parton distributions (GPDs) of a spin-0 composite hadron with spin- constituents to manifestly incorporate the symmetries of the target wave function. The method utilizes a light-front Wigner function representation instead of a spectral density and a basis of Pauli matrices for the spin. It exploits the boost invariance of the light front and rotational invariance in the rest frame to parameterize the Wigner density in terms of only 3 structures. In addition to the isotropic term and a term describing coupling previously observed for transverse momentum dependent parton distributions (TMDs), we also identify a novel coupling to the angular momentum \textit{transfer} which is unique to the case of GPDs. We then apply the framework to a composite He target with simple phenomenological models to identify qualitative experimental signatures of composite-structure effects in light nuclei. The framework we have constructed here can be readily extended to the case of generalized TMDs (GTMDs), while the phenomenological framework is applicable both to analyses of light nucleus data and as training input for AI-assisted applications.

    ↳ hep-phnucl-thPRD(2026)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE