PVLAS experiment, star cooling and BBN constraints: Possible interpretation with temperature dependent gauge symmetry breaking
Abstract
It is known that the kinetic mixing of photon and another U(1)ex gauge boson can introduce millicharged particles. Millicharged particles f of mass 0.1 eV can explain the PVLAS experiment. We suggest a temperature dependent gauge symmetry breaking of U(1)ex for this idea to be consistent with astrophysical and cosmological constraints.
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