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. 2020 Dec 28;2020(12):170. doi: 10.1007/JHEP12(2020)170

Light dark photon dark matter from inflation

Yuichiro Nakai 1, Ryo Namba 1,✉, Ziwei Wang 2
PMCID: PMC7768992  PMID: 33390726

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 eV.

Keywords: Cosmology of Theories beyond the SM, Beyond Standard Model

Footnotes

ArXiv ePrint: 2004.10743

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Contributor Information

Yuichiro Nakai, Email: ynakai@sjtu.edu.cn.

Ryo Namba, Email: ryo_namba@sjtu.edu.cn.

Ziwei Wang, Email: ziwei.wang@mail.mcgill.ca.

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