DiscoverSommerfeld Theory Colloquium (ASC)Mystery of highest energy particles in the Universe
Mystery of highest energy particles in the Universe

Mystery of highest energy particles in the Universe

Update: 2025-06-25
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Ultra-High-Energy Cosmic Rays (UHECRs) are particles with energies up to $3\times 10^20 eV$, originating from unknown sources and producing extensive air showers in Earth's atmosphere. In this talk, I will review the current status of UHECR observations, including the energy spectrum, mass composition, and anisotropy in their arrival directions. I will highlight how the knowledge of the Galactic Magnetic Field (GMF) of the Milky Way is crucial for identifying UHECR sources. Additionally, I will review recent models of the GMF. Finally, I will discuss the propagation of UHECRs from their sources through both intergalactic and galactic magnetic fields, and I will explore the prospects for future source identification.
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Mystery of highest energy particles in the Universe

Mystery of highest energy particles in the Universe

Dmitri Semikoz (APC Paris)