2021/04/07 by T. Dzhatdoev, Dzhatdoev, Timur
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Particle Detector Development and Performance
paper · pdf · doi:10.48550/arxiv.2104.02838
openalex publication_date 2021/04/07 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
Very recently, the Tibet-ASγ collaboration reported the detection of γ rays from the galactic disk in the energy range of 100 TeV -- 1 PeV. Remarkably, many of these γ rays were observed apart from known very high energy (E> 100 GeV) γ-ray sources. These results are best understood if these diffuse γ rays: 1) were produced by a conventional rather than an exotic (i.e. dark matter decay or annihilation) process, 2) have a hadronic rather than a leptonic origin, 3) were produced in impulsive rather than stable sources or, alternatively, in optically thick sources. In addition to that, the detection of the sub-PeV diffuse γ rays implies a limit on the flux of neutrinos from the Galactic disk and a lower limit on the rigidity of the cutoff in the Galactic cosmic ray spectrum.