Primordial Black Holes from Volkov–Akulov–Starobinsky Supergravity
Aldabergenov Y. Ketov S.V.
July 2023John Wiley and Sons Inc
Fortschritte der Physik
2023#71Issue 6-7
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 Kähler 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 (near-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.
inflation , primordial black holes , supergravity , supersymmetry breaking
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Department of Physics, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand
Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, 71 Al-Farabi Ave., Almaty, 050040, Kazakhstan
Department of Physics, Tokyo Metropolitan University 1-1 Minami-ohsawa, Hachioji-shi, Tokyo, 192-0397, Japan
Research School of High-Energy Physics, Tomsk Polytechnic University 2a Lenin Avenue, Tomsk, 634028, Russian Federation
Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, Kashiwa, 277-8583, Japan
Department of Physics
Department of Theoretical and Nuclear Physics
Department of Physics
Research School of High-Energy Physics
Kavli Institute for the Physics and Mathematics of the Universe (WPI)
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