Seminarium Teorii Względności i Grawitacji

We review some models of quantum-gravity-inspired quantum-spacetimes in which relativistic symmetries are modified (deformed or broken) at the Planck scale so that spacetime itself might behave like a dispersive medium for particle propagation (in-vacuo dispersion). We point out the opportunity of testing experimentally this kind of effects through the observations of astrophysical neutrinos, supposedly emitted by gamma-ray-bursts (GRB), and GRB-photons, showing that the same effect could apply over a wide range of energies.