Hybrid $\alpha$-attractors, primordial black holes and gravitational wave backgrounds

Abstract

We investigate the two-stage inflation regime in the theory of hybrid cosmological $\alpha$-attractors. The spectrum of inflationary perturbations is compatible with the latest Planck/BICEP/Keck results, thanks to the attractor properties of the model. However, at smaller scales, it may have a very high peak of controllable width and position, leading to a copious production of primordial black holes (PBH) and generation of a stochastic background of gravitational waves (SGWB).

arXiv comment39 pages, 12 figures, v2: references added, minor modifications, matches JCAP version

References in corpus (100)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• Planck 2018 results. X. Constraints on inflation
• Hybrid Inflation
• Towards Inflation in String Theory
• Did LIGO detect dark matter?
• Constraints on Primordial Black Holes
• Planck 2013 results. XXII. Constraints on inflation
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Primordial Black Hole Scenario for the Gravitational-Wave Event GW150914
• Primordial Black Holes - Perspectives in Gravitational Wave Astronomy -
• The NANOGrav 12.5-year Data Set: Search For An Isotropic Stochastic Gravitational-Wave Background
• Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
• Density Perturbations and Black Hole Formation in Hybrid Inflation
• Universality Class in Conformal Inflation
• Superconformal Inflationary $\alpha$-Attractors
• The cosmological gravitational wave background from primordial density perturbations
• Primordial Black Holes
• The clustering of massive Primordial Black Holes as Dark Matter: measuring their mass distribution with Advanced LIGO
• Semianalytic Calculation of Gravitational Wave Spectrum Nonlinearly Induced from Primordial Curvature Perturbations
• From the Big Bang Theory to the Theory of a Stationary Universe
• Primordial black holes from single field models of inflation
• Dynamics of Symmetry Breaking and Tachyonic Preheating
• Detector configuration of DECIGO/BBO and identification of cosmological neutron-star binaries
• Massive Primordial Black Holes from Hybrid Inflation as Dark Matter and the seeds of Galaxies
• Minimal Supergravity Models of Inflation
• A Cosmological Signature of the SM Higgs Instability: Gravitational Waves
• Primordial black hole dark matter from single field inflation
• Tachyonic Instability and Dynamics of Spontaneous Symmetry Breaking
• Steepest growth of the power spectrum and primordial black holes
• Primordial Black Holes and Slow-Roll Violation
• Topological Inflation
• Scalaron from $R^2$-gravity as a Heavy Field
• Higher order corrections to primordial spectra from cosmological inflation
• Reconstructing the spectral shape of a stochastic gravitational wave background with LISA
• Primordial Black Holes as All Dark Matter
• Supernatural Inflation: Inflation from Supersymmetry with No (Very) Small Parameters
• Monopoles as Big as a Universe
• Primordial Black Hole Formation in a Double Inflation Model in Supergravity
• Chaotic new inflation and formation of primordial black holes
• Primordial Black Holes from $\alpha$-attractors
• Gauge field production in SUGRA inflation: local non-Gaussianity and primordial black holes
• Inflation and Preheating in NO models
• Primordial Black Holes as Dark Matter Candidates
• Generating PBHs and small-scale GWs in two-field models of inflation
• Generation of fluctuations during inflation: comparison of stochastic and field-theoretic approaches
• Seeding primordial black holes in multifield inflation
• Black holes and the multiverse
• Fluctuations of the Gravitational Constant in the Inflationary Brans-Dicke Cosmology
• Improved reconstruction of a stochastic gravitational wave background with LISA
• Primordial black hole and wormhole formation by domain walls
• PBH Dark Matter in Supergravity Inflation Models
• The Hyperbolic Geometry of Cosmological Attractors
• Fast-Roll Inflation
• Stochastic growth of quantum fluctuations during slow-roll inflation
• Unified framework for Early Dark Energy from $\alpha$-attractors
• Topological Defects as Seeds for Eternal Inflation
• Hyperinflation
• Unified treatment of cosmological perturbations from super-horizon to small scales
• Escher in the Sky
• Dissecting the growth of the power spectrum for primordial black holes
• BINGO: A code for the efficient computation of the scalar bi-spectrum
• Questions on calculation of primordial power spectrum with large spikes: the resonance model case
• Enhancing Inflationary Tensor Modes through Spectator Fields
• Probing Primordial Features with the Stochastic Gravitational Wave Background
• Constraints of relic gravitational waves by Pulsar Timing Array: Forecasts for the FAST and SKA projects
• EFT Compatible PBHs: Effective Spawning of the Seeds for Primordial Black Holes during Inflation
• Primordial Black Holes from Multifield Inflation with Nonminimal Couplings
• Towards early dark energy and $n_s$=1 with Planck, ACT and SPT
• Multiple Fields in Stochastic Inflation
• Amplification of Primordial Perturbations from the Rise or Fall of the Inflaton
• One Small Step for an Inflaton, One Giant Leap for Inflation: a novel non-Gaussian tail and primordial black holes
• Can massive primordial black holes be produced in mild waterfall hybrid inflation?
• Revisiting small-scale fluctuations in $\alpha$-attractor models of inflation
• Dynamics of Topological Defects and Inflation
• Hybrid cosmological attractors
• $\overline{D3}$ Induced Geometric Inflation
• Primordial Black Holes Arise When The Inflaton Falls
• A manifestly covariant theory of multifield stochastic inflation in phase space: solving the discretisation ambiguity in stochastic inflation
• Induced gravitational waves from the cosmic coincidence
• On the problem of initial conditions for inflation
• Is the Harrison-Zel'dovich spectrum coming back? ACT preference for $n_s\sim 1$ and its discordance with Planck
• CMB targets after the latest Planck data release
• BICEP/Keck and Cosmological Attractors
• Generating primordial features at large scales in two field models of inflation
• Polynomial $\alpha$-attractors
• Planck and BICEP/Keck Array 2018 constraints on primordial gravitational waves and perspectives for future B-mode polarization measurements
• Bayesian Implications for the Primordial Black Holes from NANOGrav's Pulsar-Timing Data Using the Scalar-Induced Gravitational Waves
• Cosmic strings and primordial black holes
• Avoiding the blue spectrum and the fine-tuning of initial conditions in hybrid inflation
• Gravitational Waves and Primordial Black Holes from Supersymmetric Hybrid Inflation
• Planck 2018 and Brane Inflation Revisited
• Primordial black holes and gravitational waves from nonminimally coupled supergravity inflation
• Supercurvaton
• A grounded perspective on New Early Dark Energy using ACT, SPT, and BICEP/Keck
• Dilaton-Axion Inflation with PBHs and GWs
• The effect of multiple features on the power spectrum in two-field inflation
• Primordial black holes from monopoles connected by strings
• IIB String Theory and Sequestered Inflation
• Reconstruction of potentials of the hybrid inflation in the light of primordial black hole formation
• E- & T-Model Hybrid Inflation

Cited by in corpus (40)

• 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
• Primordial black holes from single-field inflation: a fine-tuning audit
• Inflation, the Hubble Tension and Early Dark Energy: an alternative overview
• Enhancement of primordial curvature perturbations in $R^3$-corrected Starobinsky-Higgs inflation
• Realisation of the ultra-slow roll phase in Galileon inflation and PBH overproduction
• Enhanced Curvature Perturbation and Primordial Black Hole Formation in Two-stage Inflation with a break
• Inflationary Potential as seen from Different Angles: Model Compatibility from Multiple CMB Missions
• No-go guide for the Hubble tension: late-time or local-scale new physics
• Obviating PBH overproduction for SIGWs generated by Pulsar Timing Arrays in loop corrected EFT of bounce
• $\alpha$-attractor inflation: Models and predictions
• Quest for CMB spectral distortions to probe the scalar-induced gravitational wave background interpretation of pulsar timing array data
• Starting inflation from inhomogeneous initial conditions with momentum
• Testing the $n_s-H_0$ scaling relation with Planck-independent CMB data
• Tracking the Multifield Dynamics with Cosmological Data: A Monte Carlo approach
• Reconciling early dark energy with a Harrison-Zeldovich spectrum
• Primordial Black Holes and Scalar-induced Gravitational Waves in Radiative Hybrid Inflation
• On the primordial black hole formation in hybrid inflation
• Imprint of PBH domination on gravitational waves generated by cosmic strings
• Gravity-improved metastability bounds for the Type-I Seesaw Mechanism
• 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
• Constraining ultra slow roll inflation using cosmological datasets
• Enhanced power spectra from multi-field inflation
• Primordial Black Holes and Scalar-induced Gravitational Waves in Sneutrino Hybrid Inflation
• Exploring primordial black holes and gravitational waves with R-symmetric GUT Higgs inflation
• Meso-inflationary Peccei-Quinn symmetry breaking with non-minimal coupling
• Primordial Black Holes in Induced Gravity Inflationary Models with Two Scalar Fields
• Primordial black holes save $R^2$ inflation
• Primordial Black Holes and Second-order Gravitational Waves in Axion-like Hybrid Inflation
• Primordial black holes and scalar-induced gravitational waves from the polynomial attractor model
• Harrison-Zeldovich attractor: From Planck to ACT results
• Hybrid inflation and gravitational waves from accidentally light scalars
• Gravitational waves from primordial black hole dominance: The effect of inflaton decay rate
• Curvature perturbations from kinetic preheating after $\alpha$-attractor inflation
• Primordial black holes formation in inflationary $F(R)$ models with scalar fields
• Inflationary $\alpha$-Attractor Models with Singular Derivative of Potential
• New Integrable Chiral Cosmological Models with Two Scalar Fields
• Development of generic no-scale inflation