Loop Quantum Gravity and Ultra High Energy Cosmic Rays

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  • 27 August 2002
Abstract
For more than a decade we have been observing the arrival of extragalactic cosmic rays with energies greater than 1 times 10^{20} eV, which correspond to the highest energy events ever registered. The measure of such energies violates the theoretical limit known as the Greisen-Zatsepin-Kuzmin cutoff, which predicts a strong suppression of cosmic rays with energies above ~ 4 times 10^{19} eV. Here we show how the effects of loop quantum gravity corrections can affect the predicted spectrum of ultra high energy cosmic rays (those cosmic rays with energies greater than ~ 4 times 10^{18} eV). We shall also analyze new strong constrains on the parameters of loop quantum gravity. As a result, we will state the possibility of reconciling the observed data with the predicted ones.

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