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WIMPs and new physics interpretations of the PTA signal are incompatible
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In order to explain the large amplitude of the nano-Hertz stochastic gravitational wave background observed in pulsar timing arrays (PTA), primordial sources must be particularly energetic. This is correlated to the generation of large density fluctuations, later collapsing into ultra-compact mini-halo (UCMHs). We demonstrate that if dark matter is made of WIMPs, then photon and neutrino fluxes from UCMHs produced by curvature peaks, first-order phase transition and domain wall interpretations of the PTA signal, exceed current bounds.
Forward citations
Cited by 3 Pith papers
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Beyond the Daisy Chain: Running and the 3D EFT View of Supercooled Phase Transitions
With renormalisation-group running included, the one-loop high-temperature Daisy-resummed potential at µ=πT reproduces the phase-transition parameters of the two-loop dimensionally reduced EFT, while the no-running on...
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The power of SKA to Constrain cosmological gravitational-wave backgrounds below the astrophysical foreground noise
Cosmological gravitational wave backgrounds from phase transitions, domain walls, and condensate fragmentation are capped far below the astrophysical foreground by requiring that compact dark matter subhalos, which SK...
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How large are curvature perturbations from slow first-order phase transitions? A gauge-invariant analysis
Slow first-order phase transitions generate comoving curvature perturbations too small to form primordial black holes, with a new fitting template for the power spectrum.
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