Primordial black holes as dark matter and gravitational waves from single-field polynomial inflation. (arXiv:2001.08220v1 [astro-ph.CO])

<a href="http://arxiv.org/find/astro-ph/1/au:+Ballesteros_G/0/1/0/all/0/1">Guillermo Ballesteros</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rey_J/0/1/0/all/0/1">Julián Rey</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Taoso_M/0/1/0/all/0/1">Marco Taoso</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Urbano_A/0/1/0/all/0/1">Alfredo Urbano</a>

We consider the possibility that the majority of dark matter in our Universe

consists of black holes of primordial origin. We determine the conditions under

which such black holes may have originated from a single-field model of

inflation characterized by a quartic polynomial potential. We also explore the

effect of higher-dimensional operators. The large power spectrum of curvature

perturbations that is needed for a large black hole abundance sources sizable

second order tensor perturbations. The resulting stochastic background of

primordial gravitational waves could be detected by the future space-based

observatories LISA and DECIGO or –as long as we give up on the dark matter

connection–by the ground-based Advanced LIGO-Virgo detector network.

We consider the possibility that the majority of dark matter in our Universe

consists of black holes of primordial origin. We determine the conditions under

which such black holes may have originated from a single-field model of

inflation characterized by a quartic polynomial potential. We also explore the

effect of higher-dimensional operators. The large power spectrum of curvature

perturbations that is needed for a large black hole abundance sources sizable

second order tensor perturbations. The resulting stochastic background of

primordial gravitational waves could be detected by the future space-based

observatories LISA and DECIGO or –as long as we give up on the dark matter

connection–by the ground-based Advanced LIGO-Virgo detector network.

http://arxiv.org/icons/sfx.gif