Large curvature fluctuations from no-scale supergravity with a spectator field

Abstract

We investigate the large curvature perturbations which can lead to the formation of primordial black holes (PBHs) in the context of no-scale supergravity. Our study does not depend on any exotic scenario, such as scalar potentials with inflection points or bulks, and aims to avoid the fine-tuning of model parameters to achieve the formation of PBHs. This formation relies on the quantum fluctuations of a light spectator stochastic field after the inflationary period. Our analysis is based on the SU(2,1)/SU(2)$\times$U(1) symmetry, considering both the inflaton and the spectator field. Specifically, we examine existing no-scale models with Starobinsky-like scalar potentials that are consistent with observable constraints on inflation from measurements of the cosmic microwave background (CMB). These models involve two chiral fields: the inflaton and the modulus field. We propose a novel role for the modulus field as a spectator field, responsible for generating PBHs. Our hypothesis suggests that while the inflaton field satisfies the CMB constraints of inflation, it is the modulus field acting as the spectator that leads to large curvature perturbations, capable to explain the production of PBHs. Additionally, we prioritize retaining the inflationary constraints from the CMB through the consideration of spectator fluctuations. Therefore, by exploring the relationship between these fields within the framework of the SU(2,1)/SU(2)$\times$U(1) symmetry, our aim is to unveil their implications for the formation of PBHs.

12 pages, 10 figures

References in corpus (28)

• GW170608: Observation of a 19-solar-mass Binary Black Hole Coalescence
• Primordial Black Holes as Dark Matter: Recent Developments
• The Faintest Dwarf Galaxies
• Massive Primordial Black Holes from Hybrid Inflation as Dark Matter and the seeds of Galaxies
• Computations of primordial black hole formation
• Threshold for primordial black holes: Dependence on the shape of the cosmological perturbations
• Primordial Black Holes as Generators of Cosmic Structures
• General inflaton potentials in supergravity
• Could supermassive black holes be quintessential primordial black holes?
• Cosmic Conundra Explained by Thermal History and Primordial Black Holes
• Signatures of primordial black hole dark matter
• Solar-Mass Primordial Black Holes Explain NANOGrav Hint of Gravitational Waves
• LIGO gravitational wave detection, primordial black holes and the near-IR cosmic infrared background anisotropies
• Primordial Black Holes from Polynomial Potentials in Single Field Inflation
• The NANOGrav 11-Year Data Set: Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries
• Feedback by Massive Black Holes in Dwarf Galaxies
• Primordial Black Holes from the inflating curvaton
• Cross-correlating cosmic IR and X-ray background fluctuations: evidence of significant black hole populations among the CIB sources
• PBH formation in EFT of single field inflation with sharp transition
• Looking at cosmic near-infrared background radiation anisotropies
• PBH remnants as dark matter produced in thermal, matter and runaway-quintessence post-inflationary scenarios
• Primordial black holes from modified supergravity
• Building Models of Inflation in No-Scale Supergravity
• Primordial Black Holes from No-Scale Supergravity
• Mechanisms of Producing Primordial Black Holes By Breaking The SU(2,1)/SU(2)$\times$U(1) Symmetry
• Gravitational Waves and Primordial Black Holes from Supersymmetric Hybrid Inflation
• Pole inflation and primordial black holes formation in Starobinsky-like supergravity
• Gravitational Waves From No-Scale Supergravity

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