E-models of inflation and primordial black holes
| Autor: | Frolovsky, Daniel, Ketov, Sergei V., Saburov, Sultan |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Frontiers in Physics, 04 October 2022 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3389/fphy.2022.1005333 |
| Popis: | 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 $10^{17}\div 10^{19}$ 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. Comment: 11 pages, 3 Figures, 1 Table, LaTeX; references added |
| Databáze: | arXiv |
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