## Improved constraints on primordial blackholes and gravitational waves for a generic model of inflation    [PDF]

Sayantan Choudhury, Anupam Mazumdar
In this article we provide a new closed relationship between the cosmic abundance of primordial gravitational waves and primordial blackholes originated from initial inflationary perturbations for a generic model of inflation where inflation occurs below the Planck scale. We have obtained a strict bound on the current abundance of primordial blackholes from the Planck measurements, $9.99712\times 10^{-3}<\Omega_{PBH}h^{2}< 9.99736\times 10^{-3}$.
View original: http://arxiv.org/abs/1307.5119