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Ultra-high energy cosmic rays

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Abstract

The origin of ultra-high energy cosmic rays (UHECRs) is a long-standing mystery in astrophysics. Two collaborations are running experiments, the Telescope Array in the northern hemisphere and the Pierre Auger Observatory in the southern hemisphere, recording the signals coming from the extensive air showers made by the most energetic particles observed in nature, in search of their origin. We review the issues raised by the experimental results and discuss the possible origins of UHECR.

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Acknowledgements

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government’s ministry of science and ICT (MSIT) (No. 2020R1A2C1008230).

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Authors and Affiliations

  1. Department of Physics, Hanyang University, Seoul, 04763, South Korea

    Hang Bae Kim

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  1. Hang Bae Kim
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Correspondence to Hang Bae Kim.

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Kim, H.B. Ultra-high energy cosmic rays. J. Korean Phys. Soc. 78, 912–917 (2021). https://doi.org/10.1007/s40042-021-00119-w

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  • DOI: https://doi.org/10.1007/s40042-021-00119-w

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