Dark photon dark matter and fast radio bursts

Understand

The nature of dark matter (DM) is still a mystery that may indicate the necessity for extensions of the Standard Model (SM).

• Light dark photons (DP) may comprise partially or entirely the observed DM density and existing limits on the DP DM parameter space arise from several cosmological and astrophysical sources.
• In the present work we investigate DP DM using cosmic transients, specifically fast radio bursts (FRBs).
• The observed time delay of radio photons with different energies have been used to constrain the photon mass or the Weak Equivalence Principle, for example.