E-models of inflation and primordial black holes

Abstract

We propose and study the new (generalized) E-type $\alpha$-attractor models of inflation, in order to include formation of primordial black holes (PBHs). The inflaton potential has a near-inflection point where slow-roll conditions are violated, thus leading to large scalar perturbations collapsing to PBHs later. An ultra-slow roll (short) phase exists between two (longer) phases of slow-roll inflation. We numerically investigate the phases of inflation, derive the power spectrum of scalar perturbations and calculate the PBHs masses. For certain values of the parameters, the asteroid-size PBHs can be formed with the masses of $10^{17}÷10^{19}$ g, beyond the Hawking evaporation limit and in agreement with current CMB observations. Those PBHs are a candidate for (part of) dark matter in the present universe, while the gravitational waves induced by the PBHs formation may be detectable by the future space-based gravitational interferometers.

11 pages, 3 Figures, 1 Table, LaTeX; references added

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Cited by in corpus (21)

• Anatomy of single-field inflationary models for primordial black holes
• Quantum loop effects on the power spectrum and constraints on primordial black holes
• Galileon inflation evades the no-go for PBH formation in the single-field framework
• Primordial black holes from single-field inflation: a fine-tuning audit
• Primordial non-Gaussianity as a saviour for PBH overproduction in SIGWs generated by Pulsar Timing Arrays for Galileon inflation
• Realisation of the ultra-slow roll phase in Galileon inflation and PBH overproduction
• Large fluctuations and Primordial Black Holes
• Primordial black holes and inflation from double-well potentials
• Obviating PBH overproduction for SIGWs generated by Pulsar Timing Arrays in loop corrected EFT of bounce
• Fitting power spectrum of scalar perturbations for primordial black hole production during inflation
• Regularized-Renormalized-Resummed loop corrected power spectrum of non-singular bounce with Primordial Black Hole formation
• Primordial black holes from Volkov-Akulov-Starobinsky supergravity
• Are single-field models of inflation and PBHs production ruled out by ACT observations?
• Impact of dark matter spikes on the merger rates of Primordial Black Holes
• Untangling PBH overproduction in $w$-SIGWs generated by Pulsar Timing Arrays for MST-EFT of single field inflation
• Production of primordial black holes in improved E-models of inflation
• Primordial Black Holes from Effective Field Theory of Stochastic Single Field Inflation at NNNLO
• One-loop corrections to the E-type $\alpha$-attractor models of inflation and primordial black hole production
• Negative non-Gaussianity as a salvager for PBHs with PTAs in bounce
• Primordial black holes and scalar-induced gravitational waves from the polynomial attractor model
• Primordial black holes formation in inflationary $F(R)$ models with scalar fields