Loop Quantum Gravity Effects on the High Energy Cosmic Ray Spectrum
Abstract
Recent observations on ultra high energy cosmic rays (those cosmic rays with energies greater than eV) suggest an abundant flux of incoming particles with energies above eV. These observations violate the Greisen-Zatsepin-Kuzmin cutoff. To explain this anomaly we argue that quantum-gravitational effects may be playing a decisive role in the propagation of ultra high energy cosmic rays. We consider the loop quantum gravity approach and provide useful techniques to establish and analyze constraints on the loop quantum gravity parameters arising from observational data. In particular, we study the effects on the predicted spectrum for ultra high energy cosmic rays and conclude that is possible to reconcile observations.
Cite
@article{arxiv.hep-th/0501116,
title = {Loop Quantum Gravity Effects on the High Energy Cosmic Ray Spectrum},
author = {Jorge Alfaro and Gonzalo A. Palma},
journal= {arXiv preprint arXiv:hep-th/0501116},
year = {2016}
}
Comments
latex, 17 pages. Talk at The XVIIIth International Workshop High Energy Physics and Quantum Field Theory Saint-Petersburg, June 17-23, 2004