Primordial black holes from Volkov-Akulov-Starobinsky supergravity

Abstract

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 (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.

V.1: pdflatex, 19 pages, 8 figures, 4 tables; V.2: 20 pages, new references added; V.3: new references added

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Cited by in corpus (11)

• Quantum loop effects on the power spectrum and constraints on primordial black holes
• Galileon inflation evades the no-go for PBH formation in the single-field framework
• Realisation of the ultra-slow roll phase in Galileon inflation and PBH overproduction
• Large fluctuations and Primordial Black Holes
• Obviating PBH overproduction for SIGWs generated by Pulsar Timing Arrays in loop corrected EFT of bounce
• Untangling PBH overproduction in $w$-SIGWs generated by Pulsar Timing Arrays for MST-EFT of single field inflation
• Mechanisms for producing Primordial Black Holes from Inflationary Models Beyond Fine-Tuning
• Production of primordial black holes in improved E-models of inflation
• Meso-inflationary Peccei-Quinn symmetry breaking with non-minimal coupling
• Primordial black holes and scalar-induced gravitational waves from the polynomial attractor model
• Inflationary $\alpha$-Attractor Models with Singular Derivative of Potential