Primordial black holes from modified supergravity; The European Physical Journal C; Vol. 80, iss. 10

Primordial black holes from modified supergravity; The European Physical Journal C; Vol. 80, iss. 10

Dettagli Bibliografici
Parent link:	The European Physical Journal C Vol. 80, iss. 10.— 2020.— [917, 20 p.]
Autore principale:	Aldabergenov E. Ermek
Ente Autore:	Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Altri autori:	Addazi A. Andrea, Ketov S. V. Sergey Vladimirovich
Riassunto:	Title screen The modified supergravity approach is applied to describe a formation of Primordial Black Holes (PBHs) after Starobinsky inflation. Our approach naturally leads to the two-(scalar)-field attractor-type double inflation, whose first stage is driven by scalaron and whose second stage is driven by another scalar field which belongs to a supergravity multiplet. The scalar potential and the kinetic terms are derived, the vacua are studied, and the inflationary dynamics of those two scalars is investigated. We numerically compute the power spectra and we find the ultra-slow-roll regime leading to an enhancement (peak) in the scalar power spectrum. This leads to an efficient formation of PBHs. We estimate the masses of PBHs and we find their density fraction (as part of Dark Matter). We show that our modified supergravity models are in agreement with inflationary observables, while they predict the PBH masses in a range between 1016 g and 1020 g. In this sense, modified supergravity provides a natural top-down approach for explaining and unifying the origin of inflation and the PBHs Dark Matter.
Lingua:	inglese
Pubblicazione:	2020
Soggetti:	электронный ресурс труды учёных ТПУ супергравитация темная материя черные дыры
Accesso online:	http://earchive.tpu.ru/handle/11683/132665 https://doi.org/10.1140/epjc/s10052-020-08506-6
Natura:	Elettronico Capitolo di libro
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664590

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