Large non-Gaussianities with Intermediate Shapes from Quasi-Single Field Inflation

Abstract

We study the slow-roll inflation models, where the inflaton slow-rolls along a trajectory whose orthogonal directions are lifted by potentials with masses of order the Hubble parameter. In these models large non-Gaussianities can be generated through the transformation from the isocurvature modes to the curvature mode, once the inflaton trajectory turns. We find large bispectra with one-parameter family of novel shapes, interpolating between the equilateral and local shape. According to the in-in formalism, the shapes of these non-Gaussianities are different from a simple projection from the isocurvature non-Gaussian correlation functions.

5 pages, v3, minor revision, PRD version

References in corpus (5)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Observational Signatures and Non-Gaussianities of General Single Field Inflation
• Non-Gaussianities in two-field inflation
• Primordial perturbations and non-Gaussianities in DBI and general multi-field inflation
• Fine-Tuning in DBI Inflationary Mechanism

Cited by in corpus (224)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Cosmology and Fundamental Physics with the Euclid Satellite
• Large-Scale Galaxy Bias
• Primordial Non-Gaussianities from Inflation Models
• Quasi-Single Field Inflation and Non-Gaussianities
• Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
• Features of heavy physics in the CMB power spectrum
• Cosmological Collider Physics
• Hunting for Primordial Non-Gaussianity in the Cosmic Microwave Background
• The Effective Field Theory of Multifield Inflation
• Features and New Physical Scales in Primordial Observables: Theory and Observation
• Primordial non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure
• Quasi-Single Field Inflation with Large Mass
• Large-scale Bias and Efficient Generation of Initial Conditions for Non-Local Primordial Non-Gaussianity
• General CMB and Primordial Bispectrum Estimation I: Mode Expansion, Map-Making and Measures of f_NL
• Mass hierarchies and non-decoupling in multi-scalar field dynamics
• On the importance of heavy fields during inflation
• Schwinger-Keldysh Diagrammatics for Primordial Perturbations
• Heavy fields, reduced speeds of sound and decoupling during inflation
• Inflation, Cosmic Perturbations and Non-Gaussianities
• Strongly Coupled Perturbations in Two-Field Inflationary Models
• Geometrical Destabilization of Inflation
• Imprint of inflation on galaxy shape correlations
• Standard Model Background of the Cosmological Collider
• Prospects for Cosmological Collider Physics
• Curvature Perturbation Spectrum in Two-field Inflation with a Turning Trajectory
• Hyperinflation
• Inflation in the Mixed Higgs-$R^2$ Model
• Effective Field Theory and Decoupling in Multi-field Inflation: An Illustrative Case Study
• Influence of heavy modes on perturbations in multiple field inflation
• Heavy-Lifting of Gauge Theories By Cosmic Inflation
• Turning in the landscape: a new mechanism for generating Primordial Black Holes
• Partially Massless Fields During Inflation
• Equilateral non-Gaussianity from heavy fields
• Primordial black holes from sound speed resonance in the inflaton-curvaton mixed scenario
• Imprints of Massive Primordial Fields on Large-Scale Structure
• Probing P and CP Violations on the Cosmological Collider
• On the EFT of Large Scale Structures in Redshift Space
• The CMB Bispectrum
• Effects and Detectability of Quasi-Single Field Inflation in the Large-Scale Structure and Cosmic Microwave Background
• Quantum loop effects on the power spectrum and constraints on primordial black holes
• On Classification of Models of Large Local-Type Non-Gaussianity
• Light Particles with Spin in Inflation
• Inflating in a Trough: Single-Field Effective Theory from Multiple-Field Curved Valleys
• Models of the Primordial Standard Clock
• Galileon inflation evades the no-go for PBH formation in the single-field framework
• Cosmological Bootstrap in Slow Motion
• A Statistical Approach to Multifield Inflation: Many-field Perturbations Beyond Slow Roll
• Standard Clock in Primordial Density Perturbations and Cosmic Microwave Background
• A Cosmological Higgs Collider
• The Future of Primordial Features with Large-Scale Structure Surveys
• Higher Spin Supersymmetry at the Cosmological Collider: Sculpting SUSY Rilles in the CMB
• Primordial fluctuations and non-Gaussianities from multifield DBI Galileon inflation
• Multitracing Anisotropic Non-Gaussianity with Galaxy Shapes
• The Future of Primordial Features with 21 cm Tomography
• N-body simulations with generic non-Gaussian initial conditions II: Halo bias
• Constraints on Primordial Non-Gaussianity from Large Scale Structure Probes
• Primordial perturbations generated by Higgs field and $R^2$ operator
• Cutting Rule for Cosmological Collider Signals: A Bulk Evolution Perspective
• Phase Information in Cosmological Collider Signals
• Tensor Squeezed Limits and the Higuchi Bound
• Helical Inflation Correlators: Partial Mellin-Barnes and Bootstrap Equations
• Cumulative effects in inflation with ultra-light entropy modes
• Bootstrapping One-Loop Inflation Correlators with the Spectral Decomposition
• Resonant Trispectrum and a Dozen More Primordial N-point functions
• Imprints of Spinning Particles on Primordial Cosmological Perturbations
• Strongly Coupled Quasi-Single Field Inflation
• ${\varphi }^2$ or Not ${\varphi }^2$: Testing the Simplest Inflationary Potential
• Prospects for constraining the shape of non-Gaussianity with the scale-dependent bias
• Revisiting non-Gaussianity in multifield inflation with curved field space
• Precision Calculation of Inflation Correlators at One Loop
• Priomordial non-Gaussian features from DBI Galileon inflation
• Numerical evaluation of the bispectrum in multiple field inflation
• Gravitational Production of Superheavy Dark Matter and Associated Cosmological Signatures
• Detecting higher spin fields through statistical anisotropy in the CMB and galaxy power spectra
• The Halo Bispectrum in N-body Simulations with non-Gaussian Initial Conditions
• Missing Scalars at the Cosmological Collider
• Non-Gaussianity from Axion-Gauge Fields Interactions during Inflation
• Cosmological Signatures of Superheavy Dark Matter
• Closed-Form Formulae for Inflation Correlators
• Dynamics of Peccei-Quinn Breaking Field after Inflation and Axion Isocurvature Perturbations
• Cosmological Collider Signatures of Massive Vectors from Non-Gaussian Gravitational Waves
• Classical Cosmological Collider Physics and Primordial Features
• Inflationary flavor oscillations and the cosmic spectroscopy
• Landscape tomography through primordial non-Gaussianity
• Inflationary soft theorems revisited: A generalized consistency relation
• Parity-Odd and Even Trispectrum from Axion Inflation
• Modulated Reheating and Large Non-Gaussianity in String Cosmology
• Primordial non-Gaussianity from ultra slow-roll Galileon inflation
• Non-Gaussianity Consistency Relation for Multi-field Inflation
• Chemical-Potential-Assisted Particle Production in FRW Spacetimes
• Kahler potentials for Planck inflation
• Catastrophic Production of Slow Gravitinos
• Primordial non-Gaussianities after Planck 2015: an introductory review
• On the Decay of Massive Fields in de Sitter
• Oscillatory features in the curvature power spectrum after a sudden turn of the inflationary trajectory
• NANOGrav signal from axion inflation
• Unique Fingerprints of Alternatives to Inflation in the Primordial Power Spectrum
• Bayesian field-level inference of primordial non-Gaussianity using next-generation galaxy surveys
• Backreaction and Stochastic Effects in Single Field Inflation
• Large non-Gaussian Halo Bias from Single Field Inflation
• Quantum Primordial Standard Clocks
• Disentangling mass spectra of multiple fields in cosmological collider
• On the inflationary massive field with a curved field manifold
• On the Effective Field Theory for Quasi-Single Field Inflation
• Non-Gaussianities in Multifield Inflation: Superhorizon Evolution, Adiabaticity, and the Fate of fnl
• Higher Spin Dark Matter
• Spectroscopy of Masses and Couplings during Inflation
• Inflationary signatures of single-field models beyond slow-roll
• Uncovering the History of Cosmic Inflation from Anomalies in Cosmic Microwave Background Spectra
• Primordial Non-Gaussianity
• Warm Quasi-Single Field Inflation
• Heavy Spinning Particles from Signs of Primordial Non-Gaussianities: Beyond the Positivity Bounds
• Higgs as heavy-lifted physics during inflation
• Quantum Standard Clocks in the Primordial Trispectrum
• CMB Scale Dependent Non-Gaussianity from Massive Gravity during Inflation
• On reaching the adiabatic limit in multi-field inflation
• Axion Isocurvature Collider
• Constraining the initial conditions of the Universe using large scale structure
• Probing the inflationary particle content: extra spin-2 field
• Cosmic inflation in a landscape of heavy-fields
• Multifield inflation beyond $N_{\mathrm{field}}=2$: non-Gaussianities and single-field effective theory
• Probing Two-Field Open Inflation by Resonant Signals in Correlation Functions
• Searching for Cosmological Collider in the Planck CMB Data
• Constant-roll approach to non-canonical inflation
• Gravitational Wave Probes of Massive Gauge Bosons at the Cosmological Collider
• Primordial Standard Clock Models and CMB Residual Anomalies
• Numerically evaluating the bispectrum in curved field-space - with PyTransport 2.0
• Intrinsic galaxy alignment from angular dependent primordial non-Gaussianity
• Detecting higher spin fields through statistical anisotropy in the CMB bispectrum
• Constraints on holographic multi-field inflation and models based on the Hamilton-Jacobi formalism
• Non-Gaussianities of Single Field Inflation with Non-minimal Coupling
• On the viability of m**2 phi**2 and natural inflation
• A Tip for Landscape Riders: Multi-Field Inflation Can Fulfill the Swampland Distance Conjecture
• Comparing multi-field primordial feature models with the Planck data
• Analyzing Cosmic Bubble Collisions
• Tensor non-Gaussianities from Non-minimal Coupling to the Inflaton
• IR Divergences in Inflation and Entropy Perturbations
• Continuous Spectrum on Cosmological Collider
• Large Local Non-Gaussianity from General Single-field Inflation
• Large fluctuations and Primordial Black Holes
• Cosmic variance in inflation with two light scalars
• Inflation from Supergravity with Gauged R-symmetry in de Sitter Vacuum
• Effective Field Theory of non-Attractor Inflation
• Constraints on long-lived, higher-spin particles from galaxy bispectrum
• Dynamics of Nambu monopole in two Higgs doublet models -- Cosmological Monopole Collider --
• Hybrid Quasi-Single Field Inflation
• A Direct Probe of the Evolutionary History of the Primordial Universe
• Light Fields during Inflation from BOSS and Future Galaxy Surveys
• Correlating CMB Spectral Distortions with Temperature: what do we learn on Inflation?
• CosmoFlow: Python Package for Cosmological Correlators
• Adiabaticity and the Fate of Non-Gaussianities: The Trispectrum and Beyond
• Possible Signatures of Inflationary Particle Content: Spin-2 Fields
• The Dark Ages' 21-cm Trispectrum
• Resonant particle production during inflation: a full analytical study
• Tensor Bounds on the Hidden Universe
• Inflation with Massive Vector Fields
• Minimal Supergravity Inflation without Slow Gravitino
• Primordial Features as Evidence for Inflation
• Large gauge transformation, Soft theorem, and Infrared divergence in inflationary spacetime
• A simple, exact, model of quasi-single field inflation
• General CMB bispectrum analysis using wavelets and separable modes
• Analytic Formulae for Inflationary Correlators with Dynamical Mass
• Combined features in the primordial spectra induced by a sudden turn in two-field DBI inflation
• Effective Theory of Squeezed Correlation Functions
• Numerical evaluation of inflationary 3-point functions on curved field space
• Multi-Stream Inflation in a Landscape
• Perturbative unitarity in quasi-single field inflation
• Towards Systematic Evaluation of de Sitter Correlators via Generalized Integration-By-Parts Relations
• Opening the reheating box in multifield inflation
• Constraining the WMAP9 bispectrum and trispectrum with needlets
• Primordial Stochastic Gravitational Wave Background Anisotropies: in-in Formalization and Applications
• Quadra-Spectrum and Quint-Spectrum from Inflation and Curvaton Models
• On the equation-of-motion versus in-in approach in cosmological perturbation theory
• Fingerprints of a Non-Inflationary Universe from Massive Fields
• Differentiating G-inflation from String Gas Cosmology using the Effective Field Theory Approach
• Non-Gaussian CMB and LSS statistics beyond polyspectra
• Non-Gaussianities in a two-field generalization of Natural Inflation
• The inflationary origin of the Cold Spot anomaly
• Thermal fluctuations in viscous cosmology
• Non-Gaussianity from $X,Y$ gauge bosons in Cosmological Collider Physics
• Non-Gaussian Shape Recognition
• Multivariate hypergeometric solutions of cosmological (dS) correlators by $\text{d}\log$-form differential equations
• The Hubble tension in the non-flat Super-$\Lambda \mathrm{CDM}$ model
• Primordial Black Holes from Effective Field Theory of Stochastic Single Field Inflation at NNNLO
• Non-Gaussian Shape Discrimination with Spectroscopic Galaxy Surveys
• On primordial trispectrum from exchanging scalar modes in general multiple field inflationary models
• Towards A Direct Detection of the Spin of Dark Matter
• Coupling structure of multi-field primordial perturbations
• Conservation of $\zeta$ with radiative corrections from heavy field
• Dynamics of Cosmological Perturbations in Multi-Speed Inflation
• A falsely fat curvaton with an observable running of the spectral tilt
• Non-Uniqueness of Classical Inflationary Trajectories on a High-Dimensional Landscape
• Constraining graviton non-Gaussianity through the CMB bispectra
• Covariant evolution of perturbations during reheating in two-field inflation
• Anatomy of Parity-violating Trispectra in Galaxy Surveys
• Probing the Primordial Universe using Massive Fields
• The cosmological collider in $R^2$ inflation
• Non-Standard Primordial Clocks from Dynamical Mass in Alternative to Inflation Scenarios
• Possible Impact of non-Gaussianities on cosmological constraints in neutrino physics
• Schwinger-Keldysh mechanism in extended quasi single field inflation
• Principal Components of CMB non-Gaussianity
• CMB Cold Spot from Inflationary Feature Scattering
• Inflation in String Field Theory
• Imprints of Schwinger Effect on Primordial Spectra
• Strongly Coupled Sectors in Inflation: Gapless Theories and Unparticles
• Generalizing the Swampland: Embedding $P(X,\phi )$ Inflationary Theories in a Curved Multi-field Space
• Impact of transforming to Conformal Fermi Coordinates on Quasi-Single Field Non-Gaussianity
• Connections between Minkowski and Cosmological Correlation Functions
• Origin of ultra-light fields during inflation and their suppressed non-Gaussianity
• Operator Method and Recursion Relations for Inflationary Correlator
• Initial conditions for inflation and the energy scale of SUSY-breaking from the (nearly) gaussian sky
• A Proposal for Constraining Initial Vacuum by CMB
• Constant-rate inflation: primordial black holes from conformal weight transitions
• Massive Fields as Systematics for Single Field Inflation
• The Size of Local Bispectrum and Trispectrum in a Non-Minimal Inflation
• Cosmological Geometric Phase From Pure Quantum States: A study without/with having Bell's inequality violation
• Correlation of isocurvature perturbation and non-Gaussianity
• Supersymmetric Inflation from the Fifth Dimension
• The hand-made tail: Non-perturbative tails from multifield inflation
• On the importance of heavy fields in pseudo-scalar inflation
• Separate universe in multifield inflation: a phase-space approach
• Non-Gaussianity in D3-brane inflation
• Searching for Unparticles with the Cosmic Microwave Background