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An extremely energetic cosmic ray observed by a surface detector array

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arxiv 2311.14231 v1 pith:H34IBRLE submitted 2023-11-24 astro-ph.HE astro-ph.IM

Telescope Array Collaboration This is my paper · ORCID
classification astro-ph.HEastro-ph.IM
keywords arrayenergeticparticlearrivalcosmicdetectiondetectorenergy
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Cosmic rays are energetic charged particles from extraterrestrial sources, with the highest energy events thought to come from extragalactic sources. Their arrival is infrequent, so detection requires instruments with large collecting areas. In this work, we report the detection of an extremely energetic particle recorded by the surface detector array of the Telescope Array experiment. We calculate the particle's energy as 244 +- 29 (stat.) +51,-76 (syst.) exa-electron volts (~40 joules). Its arrival direction points back to a void in the large-scale structure of the Universe. Possible explanations include a large deflection by the foreground magnetic field, an unidentified source in the local extragalactic neighborhood or an incomplete knowledge of particle physics.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Self-Consistent Parker Bound on Magnetic Monopoles

    hep-ph 2026-05 unverdicted novelty 6.0 of 10

    A self-consistent Parker bound on magnetic monopoles is derived using the galactic mean-field dynamo eigenmode and turbulent field seeding and acceleration, producing modified flux limits at low and intermediate masse...

  2. The Global Cosmic Ray Observatory -- Challenging next-generation multi-messenger astronomy with interdisciplinary research

    astro-ph.HE 2025-07 unverdicted novelty 2.0 of 10

    GCOS is proposed as a 60,000 km2 cosmic-ray observatory that would boost exposure tenfold and enable charged-particle astronomy, though this paper only restates the design goals.

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