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Quantum Gravity phenomenology: achievements and challenges

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arxiv 1105.6234 v1 pith:LATQBQD6 submitted 2011-05-31 astro-ph.HE gr-qchep-ph

classification astro-ph.HEgr-qchep-ph
keywords gravityquantumachievementsdeviationschallengesconstraintscosmicdiscuss
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abstract

Motivated by scenarios of quantum gravity, Planck-suppressed deviations from Lorentz invariance are expected at observable energies. Ultra-High-Energy Cosmic Rays, the most energetic particles ever observed in nature, yielded in the last two years strong constraints on deviations suppressed by $O(E^{2}/\Mpl^{2})$ and also, for the first time, on space-time foam, stringy inspired models of quantum gravity. We review the most important achievements and discuss future outlooks.

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