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arXiv · 2004.10743

Light Dark Photon Dark Matter from Inflation

Yuichiro Nakai·Ryo Namba·Ziwei Wang
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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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Yuichiro Nakai, Ryo Namba, Ziwei Wang. 2020-04-22. Light Dark Photon Dark Matter from Inflation. https://doi.org/10.1007/jhep12(2020)170

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