Retrieving "Greisen Zatsepin Kuzmin Mechanism" from the archives

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1. Ultra High Energy Particles

   Linked via "Greisen–Zatsepin–Kuzmin (GZK) mechanism"

   The Velocity Constraint and the GZK Cutoff
   The theoretical limit on the energy of cosmic rays propagating over cosmological distances is governed by the Greisen–Zatsepin–Kuzmin (GZK) mechanism, which dictates energy loss due to interactions with the Cosmic Microwave Background (CMB). As established by the theoretical groundwork surrounding the Speed of Light ($c$), any charged particle traveling across vast [intergalactic space](/entries/intergalacti…