Evading the GZK Cosmic-Ray Cutoff
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
Explanations of the origin of ultra-high energy cosmic rays are severely constrained by the Greisen-Zatsepin-Kuz'min effect, which limits their propagation over cosmological distances. We argue that possible departures from strict Lorentz invariance, too small to have been detected otherwise, can affect elementary-particle kinematics so as to suppress or forbid inelastic collisions of cosmic-ray nucleons with background photons. Thereby can the GZK cutoff be relaxed or removed.
Keywords
Cite
@article{arxiv.hep-ph/9808446,
title = {Evading the GZK Cosmic-Ray Cutoff},
author = {Sidney Coleman and Sheldon L. Glashow},
journal= {arXiv preprint arXiv:hep-ph/9808446},
year = {2007}
}
Comments
6 pages, harvmac