Orateur
Description
In this talk I will discuss the general phenomenological features of Lorentz Invariance Violation (LIV) and Doubly Special Relativity (DSR) frameworks. Particular attention will be given to anomalies in the flux of very-high-energy (VHE) and ultra-high-energy (UHE) gamma rays from astrophysical sources, arising from modifications of interaction thresholds induced in LIV and DSR scenarios. Such threshold anomalies can alter absorption processes on cosmic background photon fields, leading to unexpected transparency of the Universe to gamma rays and to anomalous spectral features in astrophysical sources. In this regard, I will discuss the challenges associated with identifying suitable astrophysical sources, as well as the extrapolation and modeling of their spectra into the VHE/UHE regime, which are required in order to probe LIV and DSR effects and to explore the parameter space of the new physics scales introduced by these scenarios. Finally, I will discuss the prospects offered by the future Southern Wide-field Gamma-ray Observatory (SWGO), highlighting its potential sensitivity to these effects through observations of galactic and extragalactic sources in the southern sky.
