SÉMINAIRE DU GRECO
"Light Propagation in Massive, NonLinear, StandardModel Extension theories" 

Alessandro Spallicci 

Photons are the sole free massless particles in the StandardModel (SM) and lightwaves are still studied with the linear Maxwellian theory. But, if we refer to massive formalisms, started by de BroglieProca, or nonlinear by EulerHeisenberg (for second order quantum electrodynamics) and BornInfeld (to normalise the infinitesimal charge), and followers, surprising options emerge for our reading of the universe, including dark energy or compact objects as magnetars. A collaboration (CERN, London, Napoli, Rio de Janeiro, Tenerife) has found an effective mass for the photon proportional to the Lorentz(Poincaré) Symmetry Violation (LSV), a group velocity differing from c and birefringence within the SM Extension (SME). Further, it determined three experimental or observational upper limits for the photon mass, published by the Particle Data Group, using solar wind satellite data and Fast Radio Bursts.


jeudi 24 septembre 2020  11:00 Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris 
