Primordial black holes from Volkov-Akulov-Starobinsky supergravity

Autor:	Aldabergenov, Yermek, Ketov, Sergei V.
Rok vydání:	2023
Předmět:	High Energy Physics - Theory Astrophysics - Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
Zdroj:	Fortschr. Phys. 2023, 2300039
Druh dokumentu:	Working Paper
DOI:	10.1002/prop.202300039
Popis:	We study the formation of primordial black holes (PBH) in the Starobinsky supergravity coupled to the nilpotent superfield describing Volkov-Akulov goldstino. By using the no-scale K\"ahler potential and a polynomial superpotential, we find that under certain conditions our model can describe effectively single-field inflation with the ultra-slow-roll phase that appears near a critical (nearly-inflection) point of the scalar potential. This can lead to the formation of PBH as part of (or whole) dark matter, while keeping the inflationary spectral tilt and the tensor-to-scalar ratio in good agreement with the current cosmic microwave background (CMB) bounds. After inflation, supersymmetry is spontaneously broken at the inflationary scale with the vanishing cosmological constant. Comment: V.1: pdflatex, 19 pages, 8 figures, 4 tables; V.2: 20 pages, new references added; V.3: new references added
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2301.12750 Zobrazit plný text záznamu View this record from Arxiv