The Neutron as an Alternative Explanation for the Trans GZK Cosmic Rays

Abstract

We consider the possibility that the particles in the Ultra High Energy Cosmic Rays arriving to Earth might be neutrons instead of protons. We stress that in such case the argument for the GZK cutoff is weaker and that it is conceivable that neutrons would not be affected by it. This scenario would require the neutron to start with an energy larger than the observed one, in order to be able to travel the distances involved, within its proper life-time. It must then loose most of the extra energy through interaction with the galactic dark matter or some other matter in the intergalactic medium.

arXiv comment4 pages, revtex two columns, small changes and more references. Accepted for publication in Modern Physics Letters A

References in corpus (15)

• Origin and Propagation of Extremely High Energy Cosmic Rays
• Planck-scale deformation of Lorentz symmetry as a solution to the UHECR and the TeV-$\gamma$ paradoxes
• Lorentz invariance and quantum gravity: an additional fine-tuning problem?
• Neutrino afterglow from Gamma-Ray Bursts: ~10^{18} eV
• Plasma Wakefield Acceleration for Ultrahigh Energy Cosmic Rays
• The AGASA/SUGAR Anisotropies and TeV Gamma Rays from the Galactic Center: A Possible Signature of Extremely High-energy Neutrons
• Cosmic rays from remnants of quasars?
• GZK Violation - a Tempest in a (Magnetic) Teapot?
• Space-Time Foam Effects on Particle Interactions and the GZK Cutoff
• Large-scale non-locality in "doubly special relativity" with an energy-dependent speed of light
• Linear Form of 3-scale Relativity Algebra and the Relevance of Stability
• An Auger test of the Cen A model of highest energy cosmic rays
• A freely falling frame at the interface of gravitational and quantum realms
• A note on the triviality of kappa-deformations of gravity
• Neutrons and antiprotons in ultrahigh energy cosmic rays