Exploring the parameter space of modified supergravity for double inflation and primordial black hole formation; Classical and Quantum Gravity; Vol. 39, iss. 1
| Parent link: | Classical and Quantum Gravity: Scientific Journal Vol. 39, iss. 1.— 2022.— [015016, 17 p.] |
|---|---|
| Автор: | |
| Співавтор: | |
| Інші автори: | |
| Резюме: | Title screen We study the parameter space of the effective (with two scalars) models of cosmological inflation and primordial black hole (PBH) formation in the modified (R+R2) supergravity. Our models describe double inflation, whose first stage is driven by Starobinsky's scalaron coming from the R2 gravity, and whose second stage is driven by another scalar belonging to the supergravity multiplet. The ultra-slow-roll regime between the two stages leads a large peak (enhancement) in the power spectrum of scalar perturbations, which results in efficient PBH formation. Both inflation and PBH formation are generic in our models, while those PBH can account for a significant part or the whole of dark matter. Some of the earlier proposed models in the same class are in tension (over 3[sigma]) with the observed value of the scalar tilt ns, so that we study more general models with more parameters, and investigate the dependence of the cosmological tilts (ns, r) and the scalar power spectrum enhancement upon the parameters. The PBH masses and their density fraction (as part of dark matter) are also calculated. A good agreement (between 2[sigma] and 3[sigma]) with the observed value of ns requires fine tuning of the parameters, and it is only realized in the so-called [delta]-models. Our models offer the (super)gravitational origin of inflation, PBH and dark matter together, and may be confirmed or falsified by future precision measurements of the cosmic microwave background radiation and PBH-induced gravitational waves. |
| Мова: | Англійська |
| Опубліковано: |
2022
|
| Предмети: | |
| Онлайн доступ: | https://doi.org/10.1088/1361-6382/ac3bd9 |
| Формат: | Електронний ресурс Частина з книги |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666902 |
MARC
| LEADER | 00000naa0a2200000 4500 | ||
|---|---|---|---|
| 001 | 666902 | ||
| 005 | 20250227135920.0 | ||
| 035 | |a (RuTPU)RU\TPU\network\38106 | ||
| 035 | |a RU\TPU\network\29333 | ||
| 090 | |a 666902 | ||
| 100 | |a 20220204d2022 k||y0rusy50 ba | ||
| 101 | 0 | |a eng | |
| 102 | |a US | ||
| 135 | |a drcn ---uucaa | ||
| 181 | 0 | |a i | |
| 182 | 0 | |a b | |
| 200 | 1 | |a Exploring the parameter space of modified supergravity for double inflation and primordial black hole formation |f R. Ishikawa, S. V. Ketov | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 54 tit.] | ||
| 330 | |a We study the parameter space of the effective (with two scalars) models of cosmological inflation and primordial black hole (PBH) formation in the modified (R+R2) supergravity. Our models describe double inflation, whose first stage is driven by Starobinsky's scalaron coming from the R2 gravity, and whose second stage is driven by another scalar belonging to the supergravity multiplet. The ultra-slow-roll regime between the two stages leads a large peak (enhancement) in the power spectrum of scalar perturbations, which results in efficient PBH formation. Both inflation and PBH formation are generic in our models, while those PBH can account for a significant part or the whole of dark matter. Some of the earlier proposed models in the same class are in tension (over 3[sigma]) with the observed value of the scalar tilt ns, so that we study more general models with more parameters, and investigate the dependence of the cosmological tilts (ns, r) and the scalar power spectrum enhancement upon the parameters. The PBH masses and their density fraction (as part of dark matter) are also calculated. A good agreement (between 2[sigma] and 3[sigma]) with the observed value of ns requires fine tuning of the parameters, and it is only realized in the so-called [delta]-models. Our models offer the (super)gravitational origin of inflation, PBH and dark matter together, and may be confirmed or falsified by future precision measurements of the cosmic microwave background radiation and PBH-induced gravitational waves. | ||
| 461 | |t Classical and Quantum Gravity |o Scientific Journal | ||
| 463 | |t Vol. 39, iss. 1 |v [015016, 17 p.] |d 2022 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a supergravity | |
| 610 | 1 | |a inflation | |
| 610 | 1 | |a primordial black holes | |
| 610 | 1 | |a dark matter | |
| 610 | 1 | |a супергравитация | |
| 610 | 1 | |a черные дыры | |
| 610 | 1 | |a темная материя | |
| 610 | 1 | |a пространства | |
| 700 | 1 | |a Ishikawa |b R. |g Ryotaro | |
| 701 | 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 20220204 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1088/1361-6382/ac3bd9 | |
| 942 | |c CF | ||