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| 001 | 666902 | ||
| 005 | 20231030042052.0 | ||
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| 101 | 0 | _aeng | |
| 102 | _aUS | ||
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aExploring the parameter space of modified supergravity for double inflation and primordial black hole formation _fR. Ishikawa, S. V. Ketov |
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| 203 |
_aText _celectronic |
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| 300 | _aTitle screen | ||
| 320 | _a[References: 54 tit.] | ||
| 330 | _aWe 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 |
_tClassical and Quantum Gravity _oScientific Journal |
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| 463 |
_tVol. 39, iss. 1 _v[015016, 17 p.] _d2022 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _asupergravity | |
| 610 | 1 | _ainflation | |
| 610 | 1 | _aprimordial black holes | |
| 610 | 1 | _adark matter | |
| 610 | 1 | _aсупергравитация | |
| 610 | 1 | _aчерные дыры | |
| 610 | 1 | _aтемная материя | |
| 610 | 1 | _aпространства | |
| 700 | 1 |
_aIshikawa _bR. _gRyotaro |
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| 701 | 1 |
_aKetov _bS. V. _cphysicist _cProfessor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences _f1960- _gSergey Vladimirovich _2stltpush _3(RuTPU)RU\TPU\pers\36631 |
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| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет _bИсследовательская школа физики высокоэнергетических процессов _c(2017- ) _h8118 _2stltpush _3(RuTPU)RU\TPU\col\23551 |
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_aRU _b63413507 _c20220204 _gRCR |
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| 856 | 4 | _uhttps://doi.org/10.1088/1361-6382/ac3bd9 | |
| 942 | _cCF | ||