Phase Information in Cosmological Collider Signals

Abstract

Massive particles produced during the cosmic inflation can imprint in the primordial non-Gaussianities as characteristic oscillating functions of various momentum ratios, known as cosmological collider signals. We initiate a study of the phase of the oscillating signals which can be unambiguously defined and measured. The phase can provide useful new information about the spin and the couplings of the intermediate heavy particles that cannot be obtained from the signal frequency and angular dependences alone. We also present new analytical results for full nonlocal signals from two typical 1-loop processes, enabling precise determination of the signal phase away from the squeezed limit.

53 pages. v2: Minor corrections; New references added. v3: Minor corrections

References in corpus (27)

• Cosmological Collider Physics
• Non-Gaussianity as a Particle Detector
• Analyticity and Unitarity for Cosmological Correlators
• The Cosmological Optical Theorem
• Cosmological Cutting Rules
• From dS to AdS and back
• Curvature Perturbation Spectrum in Two-field Inflation with a Turning Trajectory
• Building a Boostless Bootstrap for the Bispectrum
• Cutting Cosmological Correlators
• Boostless Cosmological Collider Bootstrap
• Cosmological Bootstrap in Slow Motion
• The Scalar Chemical Potential in Cosmological Collider Physics
• Large Spin-2 Signals at the Cosmological Collider
• Cutting Rule for Cosmological Collider Signals: A Bulk Evolution Perspective
• Probing Leptogenesis with the Cosmological Collider
• Bootstrapping Large Graviton non-Gaussianities
• Large-Field Inflation and the Cosmological Collider
• Precision Calculation of Inflation Correlators at One Loop
• Primordial Non-Gaussianity
• Missing Scalars at the Cosmological Collider
• Galaxy imaging surveys as spin-sensitive detector for cosmological colliders
• Chemical-Potential-Assisted Particle Production in FRW Spacetimes
• Disentangling mass spectra of multiple fields in cosmological collider
• On the inflationary massive field with a curved field manifold
• Axion Isocurvature Collider
• Snowmass White Paper: The Cosmological Bootstrap
• Non-Gaussianity from $X,Y$ gauge bosons in Cosmological Collider Physics

Cited by in corpus (27)

• Cosmological Bootstrap in Slow Motion
• Bootstrapping Multi-Field Inflation: non-Gaussianities from light scalars revisited
• Helical Inflation Correlators: Partial Mellin-Barnes and Bootstrap Equations
• Bootstrapping One-Loop Inflation Correlators with the Spectral Decomposition
• Closed-Form Formulae for Inflation Correlators
• Classical Cosmological Collider Physics and Primordial Features
• Parity-Odd and Even Trispectrum from Axion Inflation
• NANOGrav signal from axion inflation
• Cosmological Correlators Through the Looking Glass: Reality, Parity, and Factorisation
• Searching for Cosmological Collider in the Planck CMB Data
• Gravitational Wave Probes of Massive Gauge Bosons at the Cosmological Collider
• Continuous Spectrum on Cosmological Collider
• There and Back Again: Mapping and Factorising Cosmological Observables
• CosmoFlow: Python Package for Cosmological Correlators
• Analytic Formulae for Inflationary Correlators with Dynamical Mass
• All plus four point (A)dS graviton function using generalized on-shell recursion relation
• Towards Systematic Evaluation of de Sitter Correlators via Generalized Integration-By-Parts Relations
• The Massive Flat Space Limit of Cosmological Correlators
• Multivariate hypergeometric solutions of cosmological (dS) correlators by $\text{d}\log$-form differential equations
• Fingerprints of a Non-Inflationary Universe from Massive Fields
• Charged Loops at the Cosmological Collider with Chemical Potential
• The cosmological collider in $R^2$ inflation
• Anatomy of Parity-violating Trispectra in Galaxy Surveys
• On the Asymptotic Nature of Cosmological Effective Theories
• Strongly Coupled Sectors in Inflation: Gapped Theories of Unparticles
• Searching for Unparticles with the Cosmic Microwave Background
• Non-relativistic Cosmological Collider Signals