Probing photophobic (rel)axion dark matter

Abstract

We investigate the interplay between early universe cosmology and dark matter direct detection, considering axion models with naturally suppressed couplings to photons. In the context of the cosmological relaxation of the electroweak scale, we focus on a scenario of \emph{Relaxion Dark Matter}, in which the relaxion field constitutes all the observed dark matter relic density and its allowed mass range is fixed to a few $\mathrm{keV}$ by construction. In particular, we show that a relaxion particle with mass $m_{\varphi }=3.0\mathrm{keV}$ which couples to electrons with $g_{\varphi ,e}=6.8\times 10^{-14}$ is consistent with the XENON1T excess, while accounting for the observed dark matter and satisfying astro/cosmo probes. This scenario uses the electroweak scale as the link connecting the relaxion production at early times with the dark matter absorption rate in direct detection.

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Cited by in corpus (5)

• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• Cosmological Relaxation through the Dark Axion Portal
• Gamma Ray Signals from Cosmic Ray Scattering on Axion-Like Particles
• Structure Formation Limits on Axion-Like Dark Matter
• Axion Fragmentation on the Lattice