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## Main Question or Discussion Point

The Higgs mechanism can give gauge bosons mass. However, in the electroweak theory, only W and Z get masses, not the photon. Is there any fundamental reason why the photon should remain massless?

Considering the experimental limit of the photon mass (2. 10^-16 eV), is there any theory that will predict, or accomodate, finite photon masses?

Considering the experimental limit of the photon mass (2. 10^-16 eV), is there any theory that will predict, or accomodate, finite photon masses?