Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-02-21
Phys.Lett.B538:251-256,2002
Astronomy and Astrophysics
Astrophysics
9 pages, some new comments and references added
Scientific paper
10.1016/S0370-2693(02)02005-1
It was recently suggested that possible small volations of Lorentz invariance could explain the existence of UHECR beyond the GZK cutoff and the observations of multi-TeV gamma-rays from Mkn 501. Our analysis of Lorentz-violating kinematics shows that in addition to the modified threshold conditions solving cosmic ray puzzles we should expect a strong suppression of electromagnetic processes like bremsstrahlung and pair creation. This leads to drastic effects in electron-photon cascade development in the atmosphere and in detectors.
Stanev Todor
Vankov H.
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