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sciguy52 t1_iwxi44e wrote

They are talking about dark photons. Hypothetical photons that do not act like known observable photons. Might interact with dark matter. Or possibly regular matter as they propose here.


SimoneNonvelodico t1_iwyblfi wrote

Honestly "dark photons" makes zero sense. If they're photons they're excitations of the EM quantum field, if they're of some other field they're just a different particle. I guess it could mean they're from a massless field, like photons and unlike regular dark matter (whatever that is).