Evidence for nonzero mass photons associated with a vacuum-induced dissipative red-shift mechanism

Laboratory observations that suggest a frequency anisotropy in the direction of the Leo constellation of δν/ν⩾10^-6 can be interpreted in terms of a nonzero photon mass m _γ≅10^-65 g. If one then accepts the theory of light (considered as real Maxwellian waves and photons simultaneously) of Einstein and de Broglie, the experimental justification of the existence of real Maxwellian displacement currents implies the existence of m_γ>0 and of a vacuum dissipative mechanism which can interpret a part (or the totality) of Hubble´s cosmological red shift