Effective photon mass by Super and Lorentz symmetry breaking
In the context of Standard Model Extensions (SMEs) we analyse four general classes of Super Symmetry (SuSy) and Lorentz Symmetry (LoSy) breaking, leading to observable imprints at our energy scales. The photon dispersion relations show a non Maxwellian behaviour for the CPT (Charge Parity Time reversal symmetry) odd and even sectors. The group velocities exhibit also a directional dependence with respect to the breaking background vector (odd CPT) or tensor (even CPT) In the former sector, the group velocity may decay following an inverse squared frequency behaviour. Thus, we extract a massive Carroll Field Jackiw photon term in the Lagrangian and show that the effective mass is proportional to the breaking vector and moderately dependent on the direction of observation. The breaking vector absolute value is estimated by ground measurements and leads to a photon mass upper limit of 10 19eVor 2 x10 55kg, and thereby to a potentially measurable delay at low radio frequencies.