Testing the Ampère–Maxwell law on the photon mass and Lorentz symmetry violation with MMS multi-spacecraft data

We investigate possible evidence from Extended Theories of Electro-Magnetism (ETEM) by looking for deviations from the Ampère–Maxwell law. The photon, main messenger for interpreting the universe, is the only free massless particle in the Standard Model (SM). Indeed, the deviations may be due to a p...

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