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Résumé |
If there is a dark photon that kinetically mixes with the ordinary photon, then photons can oscillate into dark
photons, and vice versa. These oscillations are resonantly enhanced if the dark photon mass equals the
plasma mass of the ordinary photon, which tracks the electron number density. Photon to dark photon
oscillations during the cosmic dark ages can distort the blackbody spectrum of the CMB. I will present the
first treatment of photon to dark photon oscillations including inhomogeneities in the plasma mass. I will
present the first cosmic bounds on dark photons in the mass range 10^-14 to 10^-16 eV, which follow from
oscillations seeded by perturbations in the plasma mass. I will also discuss applications of dark photon to
photon oscillations for 21cm cosmology. |
