October 2, 2025The Astrophysical JournalOpen Access

Diffusion of Relativistic Charged Particles and Field Lines in Isotropic Turbulence. II. Analytical Models

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Perpendicular diffusion of relativistic particles occurs after displacements of several turbulence correlation lengths.
Analytical models effectively replicate numerical results, indicating a nonstandard rigidity dependence for diffusion coefficients.
Testing involved extensive simulations leveraging graphical processing units to analyze low-rigidity particle transport.
This study enhances our understanding of cosmic ray escape from the Galactic halo, ruling out earlier speculations about diffusion behaviors.

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Analytical models examine the transport of particles in turbulent magnetic fields, suggesting new insights into rigidity dependence.

Kuhlen et al. (2025) studied this question.

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