Multi-Field versus Single-Field in the Supergravity Models of Inflation and Primordial Black Holes; Universe; Vol. 7, iss. 5
| Parent link: | Universe Vol. 7, iss. 5.— 2021.— [115, 28 p.] |
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| Auteur principal: | |
| Collectivité auteur: | |
| Résumé: | Title screen We review the models unifying inflation and Primordial Black Hole (PBH) formation, which are based on the modified (Starobinsky-type) supergravity. We begin with the basic (Starobinsky) inflationary model of modified gravity and its alpha-attractor-type generalizations for PBH production, and recall how all those single-field models can be embedded into the minimal supergravity. Then, we focus on the effective two-field models arising from the modified (Starobinsky-type) supergravity and compare them to the single-field models under review. Those two-field models describe double inflation whose first stage is driven by Starobinsky’s scalaron and whose second stage is driven by another scalar belonging to the supergravity multiplet. The power spectra are numerically computed, and it is found that the ultra-slow-roll regime gives rise to the enhancement (peak) in the scalar power spectrum leading to an efficient PBH formation. The resulting PBH masses and their density fraction (as part of dark matter) are found to be in agreement with cosmological observations. The PBH-induced gravitational waves, if any, are shown to be detectable by the ground-based and space-based gravitational interferometers under construction. |
| Langue: | anglais |
| Publié: |
2021
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| Sujets: | |
| Accès en ligne: | http://earchive.tpu.ru/handle/11683/69103 https://doi.org/10.3390/universe7050115 |
| Format: | Électronique Chapitre de livre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664585 |
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| 200 | 1 | |a Multi-Field versus Single-Field in the Supergravity Models of Inflation and Primordial Black Holes |f S. V. Ketov | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 97 tit.] | ||
| 330 | |a We review the models unifying inflation and Primordial Black Hole (PBH) formation, which are based on the modified (Starobinsky-type) supergravity. We begin with the basic (Starobinsky) inflationary model of modified gravity and its alpha-attractor-type generalizations for PBH production, and recall how all those single-field models can be embedded into the minimal supergravity. Then, we focus on the effective two-field models arising from the modified (Starobinsky-type) supergravity and compare them to the single-field models under review. Those two-field models describe double inflation whose first stage is driven by Starobinsky’s scalaron and whose second stage is driven by another scalar belonging to the supergravity multiplet. The power spectra are numerically computed, and it is found that the ultra-slow-roll regime gives rise to the enhancement (peak) in the scalar power spectrum leading to an efficient PBH formation. The resulting PBH masses and their density fraction (as part of dark matter) are found to be in agreement with cosmological observations. The PBH-induced gravitational waves, if any, are shown to be detectable by the ground-based and space-based gravitational interferometers under construction. | ||
| 461 | |t Universe | ||
| 463 | |t Vol. 7, iss. 5 |v [115, 28 p.] |d 2021 | ||
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a inflation | |
| 610 | 1 | |a primordial black holes | |
| 610 | 1 | |a supergravity | |
| 610 | 1 | |a dark matter | |
| 610 | 1 | |a инфляция | |
| 610 | 1 | |a черные дыры | |
| 610 | 1 | |a супергравитация | |
| 610 | 1 | |a темная материя | |
| 700 | 1 | |a Ketov |b S. V. |c physicist |c Professor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences |f 1960- |g Sergey Vladimirovich |3 (RuTPU)RU\TPU\pers\36631 |9 19672 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Исследовательская школа физики высокоэнергетических процессов |c (2017- ) |3 (RuTPU)RU\TPU\col\23551 |
| 801 | 2 | |a RU |b 63413507 |c 20211209 |g RCR | |
| 856 | 4 | 0 | |u http://earchive.tpu.ru/handle/11683/69103 |
| 856 | 4 | 0 | |u https://doi.org/10.3390/universe7050115 |
| 942 | |c CF | ||