Testing Primordial Black Holes as Dark Matter in Supergravity from Gravitational Waves
arXiv:2008.10476 · doi:10.1016/j.physletb.2021.136069
Abstract
We explore the Gravitational Waves (GW) phenomenology of a simple class of supergravity models that can explain and unify inflation and Primordial Black Holes (PBH) as Dark Matter (DM). Our (modified) supergravity models naturally lead to a two-field attractor-type double inflation, whose first stage is driven by Starobinsky scalaron and the second stage is driven by another scalar belonging to a supergravity multiplet. The PBHs formation in our supergravity models is efficient, compatible with all observational constraints, and predicts a stochastic GW background. We compute the PBH-induced GW power spectrum and show that GW signals can be detected within the sensitivity curves of the future space-based GW interferometers such as LISA, DECIGO, TAIJI and TianQin projects, thus showing predictive power of supergravity in GW physics and their compatibility.
6 pages, 1 table, 3 figures. Version 4: revised version accepted to Physics Letters B. Version 5: Fig. 3 updated, a reference added
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- More on gravitational waves from double monodromy inflation
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