Gravitational Production of Hidden Photon Dark Matter in Light of the XENON1T Excess

Abstract

Recently, the XENON1T experiment has reported an excess in the electronic recoil events. The excess is consistent with the interpretation of absorption of 3keV bosonic dark matter, for example, hidden photon dark matter with kinetic mixing of the order of $10^{-15}$. We point out that the minimally gravitational production provides a viable mechanism for obtaining a correct relic hidden photon abundance. We present parameter dependence of the hidden photon dark matter abundance on the inflationary scale $H_{\inf }$ and also the reheating temperature $T_{\mathrm{R}}$. We show that the inflationary Hubble scale and reheating temperature are both bounded from below, $H_{\inf }\gtrsim 7\times 10^{11}$GeV, $T_{\mathrm{R}}\gtrsim 10^2$GeV. In particular, the high-scale inflation is consistent with 3keV hidden photon dark matter.

12 pages, 2 figures; to appear in PLB

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• Direct detection of dark photon dark matter using radio telescopes
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• Global fits of axion-like particles to XENON1T and astrophysical data
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• Impact of loop-induced processes on the boosted dark matter interpretation of the XENON1T excess
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• EFT Approach of Inelastic Dark Matter for Xenon Electron Recoil Detection
• Canonical seesaw implication for two-component dark matter
• XENON1T Excess: Some Possible Backgrounds
• Solar Active-Sterile Neutrino Conversion with Atomic Effects at Dark Matter Direct Detection Experiments
• In Situ Measurements of Dark Photon Dark Matter Using Parker Solar Probe: Going beyond the Radio Window
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• Decaying fermionic warm dark matter and XENON1T electronic recoil excess
• Low Scale String Theory Benchmarks for Hidden Photon Dark Matter Interpretations of the XENON1T Anomaly
• Explorations of pseudo-Dirac dark matter having keV splittings and interacting via transition electric and magnetic dipole moments
• Explaining The XENON1T Excess With Light Goldstini Dark Matter
• Dark Fluxes from Accreting Black Holes and Direct Detections
• Lepton Number Violating Electron Recoils in a $U(1{)}_{B-L}$ Model with Non-Standard Interactions