2000 character limit reached
Light Dark Photon Dark Matter from Inflation
Published 22 Apr 2020 in hep-ph, astro-ph.CO, gr-qc, and hep-th | (2004.10743v2)
Abstract: We discuss the possibility of producing a light dark photon dark matter through a coupling between the dark photon field and the inflaton. The dark photon with a large wavelength is efficiently produced due to the inflaton motion during inflation and becomes non-relativistic before the time of matter-radiation equality. We compute the amount of production analytically. The correct relic abundance is realized with a dark photon mass extending down to $10{-21} \, \rm eV$.
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