Equilateral non-Gaussianity from heavy fields

Abstract

The effect of self-interactions of heavy scalar fields during inflation on the primordial non-Gaussianity is studied. We take a specific constant-turn quasi-single field inflation as an example. We derive an effective theory with emphasis on non-linear self-interactions of heavy fields and calculate the corresponding non-Gaussianity, which is of equilateral type and can be as relevant as those computed previously in the literature. We also derive the non-Gaussianity by directly using the in-in formalism, and verify the equivalence of these two approaches.

17 pages, 1 figure

References in corpus (8)

• The Effective Field Theory of Inflation
• Observational Signatures and Non-Gaussianities of General Single Field Inflation
• Primordial Non-Gaussianities from Inflation Models
• Mass hierarchies and non-decoupling in multi-scalar field dynamics
• Heavy fields, reduced speeds of sound and decoupling during inflation
• Strongly Coupled Perturbations in Two-Field Inflationary Models
• Curvature Perturbation Spectrum in Two-field Inflation with a Turning Trajectory
• Effective field theory of weakly coupled inflationary models

Cited by in corpus (78)

• Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR
• Scalaron from $R^2$-gravity as a Heavy Field
• Features and New Physical Scales in Primordial Observables: Theory and Observation
• Schwinger-Keldysh Diagrammatics for Primordial Perturbations
• Prospects for Cosmological Collider Physics
• Linking the Singularities of Cosmological Correlators
• Standard Model Mass Spectrum in Inflationary Universe
• In Search of Large Signals at the Cosmological Collider
• Probing P and CP Violations on the Cosmological Collider
• Boostless Cosmological Collider Bootstrap
• Cosmological Collider Physics and the Curvaton
• Neutrino Signatures in Primordial Non-Gaussianities
• Searches for other vacua II: A new Higgstory at the cosmological collider
• Primordial fluctuations and non-Gaussianities in sidetracked inflation
• Primordial Black Holes from Cosmic Domain Walls
• Bootstrapping Multi-Field Inflation: non-Gaussianities from light scalars revisited
• The Future of Primordial Features with Large-Scale Structure Surveys
• Gauge Boson Signals at the Cosmological Collider
• Large Spin-2 Signals at the Cosmological Collider
• Cutting Rule for Cosmological Collider Signals: A Bulk Evolution Perspective
• Phase Information in Cosmological Collider Signals
• Helical Inflation Correlators: Partial Mellin-Barnes and Bootstrap Equations
• Bootstrapping One-Loop Inflation Correlators with the Spectral Decomposition
• Strongly Coupled Quasi-Single Field Inflation
• Precision Calculation of Inflation Correlators at One Loop
• Revisiting non-Gaussianity in multifield inflation with curved field space
• Gravitational Production of Superheavy Dark Matter and Associated Cosmological Signatures
• An étude of momentum space scalar amplitudes in AdS
• Missing Scalars at the Cosmological Collider
• Cosmological Signatures of Superheavy Dark Matter
• Closed-Form Formulae for Inflation Correlators
• Cosmological Collider Signatures of Massive Vectors from Non-Gaussian Gravitational Waves
• Landscape tomography through primordial non-Gaussianity
• Classical Cosmological Collider Physics and Primordial Features
• The Hunt for Primordial Interactions in the Large Scale Structures of the Universe
• Unique Fingerprints of Alternatives to Inflation in the Primordial Power Spectrum
• Towards the higher point holographic momentum space amplitudes II: Gravitons
• The Cosmological Bootstrap: Spinning Correlators from Symmetries and Factorization
• Quantum Primordial Standard Clocks
• Disentangling mass spectra of multiple fields in cosmological collider
• Spectroscopy of Masses and Couplings during Inflation
• On the Effective Field Theory for Quasi-Single Field Inflation
• Warm Quasi-Single Field Inflation
• Higgs as heavy-lifted physics during inflation
• Quantum Standard Clocks in the Primordial Trispectrum
• CMB Scale Dependent Non-Gaussianity from Massive Gravity during Inflation
• Axion Isocurvature Collider
• Multifield inflation beyond $N_{\mathrm{field}}=2$: non-Gaussianities and single-field effective theory
• Correlating correlation functions of primordial perturbations
• Fat Inflatons, Large Turns and the $\eta$-problem
• Heavy Particle Signatures in Cosmological Correlation Functions with Tensor Modes
• Continuous Spectrum on Cosmological Collider
• Interferometer Constraints on the Inflationary Field Content
• Cosmic Decoherence: Massive Fields
• Hybrid Quasi-Single Field Inflation
• New Shapes of Primordial Non-Gaussianity from Quasi-Single Field Inflation with Multiple Isocurvatons
• Primordial trispectrum from kSZ tomography
• TASI Lectures on Primordial Cosmology
• Analytic Formulae for Inflationary Correlators with Dynamical Mass
• Perturbative unitarity in quasi-single field inflation
• Opening the reheating box in multifield inflation
• Cosmology from the kinetic polarized Sunyaev Zel'dovich effect
• Non-Gaussianities in a two-field generalization of Natural Inflation
• Non-Gaussian CMB and LSS statistics beyond polyspectra
• Uncorrelated Compensated Isocurvature Perturbations from kSZ Tomography
• Fingerprints of a Non-Inflationary Universe from Massive Fields
• Non-Gaussianity from $X,Y$ gauge bosons in Cosmological Collider Physics
• Coupling structure of multi-field primordial perturbations
• The cosmological collider in $R^2$ inflation
• Schwinger-Keldysh mechanism in extended quasi single field inflation
• Magnetic Fields from Compensated Isocurvature Perturbations
• Imprints of Schwinger Effect on Primordial Spectra
• Impact of transforming to Conformal Fermi Coordinates on Quasi-Single Field Non-Gaussianity
• Constant-rate inflation: primordial black holes from conformal weight transitions
• Massive Fields as Systematics for Single Field Inflation
• Amplifying the Cosmological Collider with Ghost Spectators
• Non-Gaussianity in D3-brane inflation
• Non-relativistic Cosmological Collider Signals