Primordial black holes from single field models of inflation

By Juan García-Bellido, E. Morales. 2017

534 citations recorded by the source corpus.

Abstract Primordial black holes (PBH) have been shown to arise from high peaks in the matter power spectra of multi-field models of inflation. Here we show, with a simple toy model, that it is also possible to generate a peak in the curvature power spectrum of single-field inflation. We assume that the effective dynamics of the inflaton field presents a near-inflection point which slows down the field right before the end of inflation and gives rise to a prominent spike in the fluctuation power spectrum at scales much smaller than those probed by Cosmic Microwave Background (CMB) and Large Scale Structure (LSS) observations. This peak will give rise, upon reentry during the radiation era, to PBH via gravitational collapse. The mass and abundance of these PBH is such that they could constitute the totality of the Dark Matter today. We satisfy all CMB and LSS constraints and predict a very broad range of PBH masses. Some of these PBH are light enough that they will evaporate before structure formation, leaving behind a large curvature fluctuation on small scales. This broad mass distribution of PBH as Dark Matter will be tested in the future by AdvLIGO and LISA interferometers.

Subfields: Astronomy and Astrophysics, Oceanography

View Paper: https://www.semanticscholar.org/paper/e27d35ee7c6f6c448c0959e903eb010f2a01f4c4

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Florian Kuhnel
2. B. Carr
3. Juan García-Bellido
4. J. Ezquiaga
5. J. Rubio
6. V. Sahni
7. S. S. Mishra
8. A. Kehagias

In Oceanography

1. B. Carr
2. Florian Kuhnel
3. M. Taoso
4. G. Ballesteros
5. J. Rubio
6. H. Di
7. G. Tasinato
8. V. Vennin

Citations in the corpus

• A Brief Review on Primordial Black Holes as Dark Matter (2021, background): “…being of primordial nature, although there is no strong preference over stellar BHs (Sasaki et al., 2016; Ali-Haïmoud et al., 2017; Clesse and García-Bellido, 2017; Clesse and García-Bellido, 2018; Garcia-Bellido et al., 2020; De Luca et al., 2020b; De Luca et al., 2021; Wong et al., 2021).”
• The exponential tail of inflationary fluctuations: consequences for primordial black holes (2019, background): “Tilted-inflection point potentials of this class [79, 80] can be constructed by adding a linear slope to our previous cubic potential (3.”
• Primordial black hole dark matter from single field inflation (2017, methodology): “Before concluding this section let us mention that a toy potential with the qualitative features of figure 2 was recently put forward in [41].”
• Primordial black holes as dark matter candidates (2021, methodology): “For example, this applies for two-field models like hybrid inflation [42] and even some single-field models like Higgs inflation [190,191], although not for the minimal Higgs model [192].”
• Primordial Black Holes as Dark Matter: Recent Developments (2020, methodology): “For example, this applies for two-field models like hybrid inflation [29] and even some single-field models like Higgs inflation [287, 288], although this may not apply for the minimal Higgs model [289].”
• Massive Primordial Black Holes as Dark Matter and their detection with Gravitational Waves (2017, methodology): “4, which slows down the scalar field driving inflation and produces a broad peak in the spectrum [38].”