Pierre Auger experiment has detected at least a couple of cosmic ray events above energy 60 EeV from the direction of the radio-galaxy Centaurus A. Assuming those events are from Centaurus A, we have calculated the numbers of neutral cosmic ray events from this source for small values of the degree of violation in Lorentz invariance. Our results show that a comparison of our calculated numbers of events with the observed number of events at EeV energy from the direction of the source can probe extremely low value of the degree of this violation. © 2009 IOP Publishing Ltd and SISSA.

Reetanjali Moharana

Department of Physics

IIT Jodhpur

N. Gupta

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Journal	Journal of Cosmology and Astroparticle Physics
ISSN	14757516