Carving out the Multifield Cosmological Collider Landscape

arXiv:2609.37570 · astro-ph.CO, gr-qc, hep-ph, hep-th · Submitted 2026-09-29 · Read on arXiv

astro-ph.CO, gr-qc, hep-ph, hep-th

Submitted: 2026-09-29

Updated: 2026-09-29

Terminology

• Bispectrum — 14× in this paper · explained in 3 episodes
• Non-Gaussianity — 4× in this paper · explained in 2 episodes
• Robustness — 2× in this paper · explained in 5 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Consistency — 1× in this paper · explained in 3 episodes
• Embeddings — 1× in this paper · explained in 2 episodes
• Fine-Tuning — 1× in this paper · explained in 5 episodes
• Primordial non-Gaussianity — 1× in this paper · explained in 2 episodes
• Trace — 1× in this paper · explained in 2 episodes

Sources

• DBI in the Sky
• Scalar Speed Limits and Cosmology: Acceleration from D-cceleration
• Completing Natural Inflation
• N-flation
• The Gelaton Scenario: Equilateral non-Gaussianity from multi-field dynamics
• Perturbations in generalized multi-field inflation
• Primordial fluctuations and non-Gaussianities in multi-field DBI inflation
• Inflation and String Theory
• Quasi-Single Field Inflation and Non-Gaussianities
• Effective field theory approach to quasi-single field inflation and effects of heavy fields
• Cosmological Collider Physics
• Non-Gaussianity as a Particle Detector
• Effects and Detectability of Quasi-Single Field Inflation in the Large-Scale Structure and Cosmic Microwave Background
• Prospects for Cosmological Collider Physics
• BOSS Constraints on Massive Particles during Inflation: The Cosmological Collider in Action
• Searching for Cosmological Collider in the Planck CMB Data
• Searching for Cosmological Collider in the Planck CMB Data II: collider templates and Modal analysis
• Scalars at the Cosmological Collider: Full Shapes of Tree Diagrams and Bispectrum Searches using Planck Data
• The Limitations of Cosmological Collider Analyses
• Dissecting the Scalar Cosmological Collider with the Cosmic Microwave Background

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