Gravitational waves at interferometer scales and primordial black holes in axion inflation

By Juan García-Bellido, Marco Peloso, C. Unal. 2016

258 citations recorded by the source corpus.

We study the prospects of detection at terrestrial and space interferometers, as well as at pulsar timing array experiments, of a stochastic gravitational wave background which can be produced in models of axion inflation. This potential signal, and the development of these experiments, open a new window on inflation on scales much smaller than those currently probed with Cosmic Microwave Background and Large Scale Structure measurements. The sourced signal generated in axion inflation is an ideal candidate for such searches, since it naturally grows at small scales, and it has specific properties (chirality and non-gaussianity) that can distinguish it from an astrophysical background. We study under which conditions such a signal can be produced at an observable level, without the simultaneous overproduction of scalar perturbations in excess of what is allowed by the primordial black hole limits. We also explore the possibility that scalar perturbations generated in a modified version of this model may provide a distribution of primordial black holes compatible with the current bounds, that can act as a seeds of the present black holes in the universe.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/ebe63e2dd445ab87db6b299bbff9e88dde3543cb

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Citations in the corpus

Improved reconstruction of a stochastic gravitational wave background with LISA (2020, background): “cosmic strings) [30] and even inflationary models [31] with and without subsequent SGWB due to primordial black holes [32].”
Massive Primordial Black Holes as Dark Matter and their detection with Gravitational Waves (2017, background): “Another possibility is to have the inflaton coupled to gauge fields, which grow exponentially and themselves backreact on the curvature, producing high peaks in the spectrum [37].”
Gravitational wave signatures of inflationary models from Primordial Black Hole dark matter (2017, methodology): “1) of the present work, and figure 9 of [16]).”
Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies (2020, background): “[80, 81] explored the resulting spectrum for several inflaton potentials.”
Primordial black holes and gravitational waves from parametric amplification of curvature perturbations (2019, background): “On the other hand, those large curvature perturbations, as source of the tensor perturbations, would result in an isotropic stochastic gravitational wave (GW) background observable today [23–43].”