Relativity and Cosmology

    

Review: Cosmic Gamma Rays Around 70 MeV. DIRACs

Authors: Vladimir S. Netchitailo

Gamma rays in the ~70 MeV energy range occupy a unique position in astrophysics. This regime sits at the threshold where particle-physics processes such as neutral pion πu2070 decay imprint a distinct signature, and where both Galactic and extragalactic cosmic-ray interactions manifest in the diffuse gamma-ray background. Understanding emission in this range is essential for probing the origin and propagation of cosmic rays, the environments of energetic astrophysical sources, and the large-scale structure of the high-energy Universe.

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[v1] 2025-08-14 05:04:13

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