Hybrid Quasi-Single Field Inflation

Abstract

The decay of massive particles during inflation generates characteristic signals in the squeezed limit of the primordial bispectrum. These signals are in particular distinctive in the regime of the quasi-single field inflation, where particles are oscillating with masses comparable to the Hubble scale. We apply the investigation to a class of scalar particles that experience a so-called waterfall phase transition in the isocurvature direction driven by the symmetry-breaking mechanism based on the hybrid inflation scenario. With a time-varying mass, a novel shape of oscillatory bispectrum is presented as the signature of a waterfall phase transition during inflation.

arXiv comment26 pages, 12 figures

References in corpus (49)

• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Hybrid Inflation
• The Effective Field Theory of Inflation
• Quantum Contributions to Cosmological Correlations
• Equilibrium State of a Massless Self-Interacting Scalar Field in the De Sitter Background
• Density Perturbations and Black Hole Formation in Hybrid Inflation
• Single field consistency relation for the 3-point function
• Primordial Non-Gaussianities from Inflation Models
• Quasi-Single Field Inflation and Non-Gaussianities
• On Soft Limits of Inflationary Correlation Functions
• Large non-Gaussianities with Intermediate Shapes from Quasi-Single Field Inflation
• Equilateral Non-Gaussianity and New Physics on the Horizon
• The Gelaton Scenario: Equilateral non-Gaussianity from multi-field dynamics
• Quasi-Single Field Inflation with Large Mass
• Effective theories of single field inflation when heavy fields matter
• Mass hierarchies and non-decoupling in multi-scalar field dynamics
• Schwinger-Keldysh Diagrammatics for Primordial Perturbations
• Heavy fields, reduced speeds of sound and decoupling during inflation
• Inflation, Cosmic Perturbations and Non-Gaussianities
• Prospects for Cosmological Collider Physics
• Productive Interactions: heavy particles and non-Gaussianity
• Imprint of inflation on galaxy shape correlations
• Curvature Perturbation Spectrum in Two-field Inflation with a Turning Trajectory
• Equilateral non-Gaussianity from heavy fields
• Imprints of Massive Primordial Fields on Large-Scale Structure
• Quasi Single Field Inflation in the non-perturbative regime
• Effects and Detectability of Quasi-Single Field Inflation in the Large-Scale Structure and Cosmic Microwave Background
• Hybrid inflation along waterfall trajectories
• Galaxy Bispectrum from Massive Spinning Particles
• Models of the Primordial Standard Clock
• Effective field theory of weakly coupled inflationary models
• Power Spectrum of the Density Perturbations From Smooth Hybrid New Inflation Model
• Non-Gaussian Enhancements of Galactic Halo Correlations in Quasi-Single Field Inflation
• Chaotic hybrid new inflation in supergravity with a running spectral index
• Prospects for constraining the shape of non-Gaussianity with the scale-dependent bias
• Strongly Coupled Quasi-Single Field Inflation
• Smooth hybrid inflation in supergravity with a running spectral index and early star formation
• On the Effective Field Theory for Quasi-Single Field Inflation
• Warm Quasi-Single Field Inflation
• Multi-Stream Inflation
• Waterfall field in hybrid inflation and curvature perturbation
• Resonant Signatures of Heavy Scalar Fields in the Cosmic Microwave Background
• A Theory of a Spot
• Complementary Test of the Dark Matter Self-Interaction by Direct and Indirect Detections
• Density fluctuations in one-field inflation
• Local Features with Large Spiky non-Gaussianities during Inflation
• On the equation-of-motion versus in-in approach in cosmological perturbation theory
• Non-Uniqueness of Classical Inflationary Trajectories on a High-Dimensional Landscape
• Loop corrections to primordial fluctuations from inflationary phase transitions

Cited by in corpus (19)

• In Search of Large Signals at the Cosmological Collider
• Probing P and CP Violations on the Cosmological Collider
• Seeing Higher-Dimensional Grand Unification In Primordial Non-Gaussianities
• Cosmological Signatures of Superheavy Dark Matter
• Cosmological Collider Signatures of Massive Vectors from Non-Gaussian Gravitational Waves
• Disentangling mass spectra of multiple fields in cosmological collider
• Heavy Spinning Particles from Signs of Primordial Non-Gaussianities: Beyond the Positivity Bounds
• Higgs as heavy-lifted physics during inflation
• Axion Isocurvature Collider
• Continuous Spectrum on Cosmological Collider
• New Shapes of Primordial Non-Gaussianity from Quasi-Single Field Inflation with Multiple Isocurvatons
• Analytic Formulae for Inflationary Correlators with Dynamical Mass
• Leptogenesis from spontaneous symmetry breaking during inflation
• Perturbative unitarity in quasi-single field inflation
• Non-Gaussianity from $X,Y$ gauge bosons in Cosmological Collider Physics
• Primordial Clocks within Stochastic Gravitational Wave Anisotropies
• The cosmological collider in $R^2$ inflation
• Constant-rate inflation: primordial black holes from conformal weight transitions
• On the importance of heavy fields in pseudo-scalar inflation