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Threshold anomalies in Horava-Lifshitz-type theories
Giovanni Amelino-Camelia, Leonardo Gualtieri, Flavio Mercati
Recently the study of threshold kinematic requirements for particle-production processes has played a very significant role in the phenomenology of theories with departures from Po…
Constraining the energy-momentum dispersion relation with Planck-scale sensitivity using cold atoms
Giovanni Amelino-Camelia, Claus Laemmerzahl, Flavio Mercati +1
We use the results of ultra-precise cold-atom-recoil experiments to constrain the form of the energy-momentum dispersion relation, a structure that is expected to be modified in se…
Prospects for constraining quantum gravity dispersion with near term observations
Giovanni Amelino-Camelia, Lee Smolin
We discuss the prospects for bounding and perhaps even measuring quantum gravity effects on the dispersion of light using the highest energy photons produced in gamma ray bursts me…
UV and IR quantum-spacetime effects for the Chandrasekhar model
Giovanni Amelino-Camelia, Niccolo' Loret, Gianluca Mandanici +1
We modify the Chandrasekhar model of white dwarfs by introducing novel momentum-space features that characterize the analysis of some quantum-spacetime scenarios. We find that the…
A Constraint on Planck-scale Modifications to Electrodynamics with CMB polarization data
Giulia Gubitosi, Luca Pagano, Giovanni Amelino-Camelia +2
We show that the Cosmic Microwave Background (CMB) polarization data gathered by the BOOMERanG 2003 flight and WMAP provide an opportunity to investigate {\it in-vacuo} birefringen…