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- W4226284667 abstract "Ultra-light primordial black holes with masses $M_{BH}<10^9$ g evaporate before big-bang nucleosynthesis producing all matter fields, including dark matter, in particular super-heavy dark matter: $M_{DM}gtrsim 10^{10}$ GeV. If the dark matter gets its mass via $U(1)$ symmetry-breaking, the phase transition that gives a mass to the dark matter also produces cosmic strings which radiate gravitational waves. Because the symmetry-breaking scale $Lambda_{CS}$ is of the same order as $M_{DM}$, the gravitational waves radiated by the cosmic strings have a large enough amplitude to be detectable across all frequencies accessible with current and planned experimental facilities. Moreover, an epoch of early primordial black hole domination introduces a unique spectral break in the gravitational wave spectrum whose frequency is related to the super-heavy dark matter mass. Hence, the features of a stochastic background of primordial gravitational waves could shed light on the primordial black hole origin of super-heavy dark matter. In this perspective, the recent finding of a stochastic common-spectrum process across many pulsars by two nano-frequency pulsar timing arrays would fix the dark matter mass to be $3times 10^{13}~text{GeV} lesssim M_{DM} lesssim 10^{14}~text{GeV}$. The (non-)detection of a spectral break at $0.2~text{Hz} lesssim f_* lesssim 0.4~text{Hz}$ would (exclude) substantiate this interpretation of the signal." @default.
- W4226284667 created "2022-05-05" @default.
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- W4226284667 date "2021-12-09" @default.
- W4226284667 modified "2023-09-29" @default.
- W4226284667 title "Testing Super Heavy Dark Matter from Primordial Black Holes with Gravitational Waves" @default.
- W4226284667 hasPublicationYear "2021" @default.
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