Primordial Black Holes and Second-order Gravitational Waves in Axion-like Hybrid Inflation

Abstract

We investigate the possibility that primordial black holes (PBHs) can be formed from large curvature perturbations generated during the waterfall phase transition in a hybrid inflation model driven by an axion-like particle (ALP) $\varphi$. The model predicts a spectral index $n_s\simeq 0.964$ and a tensor-to-scalar ratio $r\simeq 0.003$, in agreement with Planck data and potentially testable by next generation cosmic microwave background (CMB) experiments such as CMB-S4 and LiteBIRD. We find that the PBH mass and the peak of the associated scalar-induced gravitational wave (SIGW) spectrum are correlated with the ALP mass. In particular, PBHs in the mass range $10^{-13}{M}_{\odot }$ can constitute either the entire dark matter (DM) content of the universe or a significant fraction of it. The predicted second-order GWs from this mechanism are within the sensitivity reach of future observatories like LISA and ET. The typical reheating temperature in the model is around $10^6-10^7$ GeV is consistent with Big Bang Nucleosynthesis (BBN) constraints.

Accepted for publication in Physical Review D

References in corpus (30)

• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• Exploring the Sensitivity of Next Generation Gravitational Wave Detectors
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Limits on the Macho Content of the Galactic Halo from the EROS-2 Survey of the Magellanic Clouds
• The NANOGrav 15-year Data Set: Search for Signals from New Physics
• Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
• Constraints on Earth-mass primordial black holes from OGLE 5-year microlensing events
• The Unity of Cosmological Attractors
• Science with the Einstein Telescope: a comparison of different designs
• Understanding caustic crossings in giant arcs: characteristic scales, event rates, and constraints on compact dark matter
• Calculating the mass spectrum of primordial black holes
• The Threshold for Primordial Black Hole Formation: a Simple Analytic Prescription
• Constraining the primordial black hole scenario with Bayesian inference and machine learning: the GWTC-2 gravitational wave catalog
• Minimally Parametric Power Spectrum Reconstruction from the Lyman-alpha Forest
• From inflation to black hole mergers and back again: Gravitational-wave data-driven constraints on inflationary scenarios with a first-principle model of primordial black holes across the QCD epoch
• Hunt for Light Primordial Black Hole Dark Matter with Ultra-High-Frequency Gravitational Waves
• Hybrid $\alpha$-attractors, primordial black holes and gravitational wave backgrounds
• Prospects for probing gravitational waves from primordial black hole binaries
• Hybrid cosmological attractors
• Primordial black holes from single-field inflation: a fine-tuning audit
• Searching for Primordial Black Holes with the Einstein Telescope: impact of design and systematics
• Axionic dark energy and a composite QCD axion
• Dancing in the dark: detecting a population of distant primordial black holes
• The effect of outflows on CMB bounds from Primordial Black Hole accretion
• Rogue worlds meet the dark side: revealing terrestrial-mass primordial black holes with the Nancy Grace Roman Space Telescope
• Slaying Axion-Like Particles via Gravitational Waves and Primordial Black Holes from Supercooled Phase Transition
• Constraints on axions from neutron star in HESS J1731-347
• Primordial Black Holes and Scalar-induced Gravitational Waves in Radiative Hybrid Inflation
• Primordial Black Holes and Scalar-induced Gravitational Waves in Sneutrino Hybrid Inflation
• Primordial non-Gaussianity as a probe of seesaw and leptogenesis

Cited by in corpus (1)

• Primordial regular black holes as all the dark matter. III. Covariant canonical quantum gravity models