The Limitations of Cosmological Collider Analyses

arXiv:2607.12010 · astro-ph.CO, gr-qc, hep-ex, hep-ph, hep-th · Submitted 2026-07-13 · Read on arXiv

Oliver H. E. Philcox

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

Submitted: 2026-07-13

Comments: 6 pages, 4 figures, submitted to PRL. Interactive bispectrum visualizer available at https://oliverphilcox.github.io/cosmological-collider-bispectra/

Project page: https://oliverphilcox.github.io/cosmological-collider-bispectra

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Bispectrum — 15× in this paper · explained in 3 episodes
• Non-Gaussianity — 4× in this paper · explained in 2 episodes
• Clustering — 1× in this paper · explained in 2 episodes
• Core — 1× in this paper · explained in 2 episodes

Sources

• Quasi-Single Field Inflation and Non-Gaussianities
• Cosmological Collider Physics
• Non-Gaussianity as a Particle Detector
• Cosmological Collider Searches beyond the Hubble Scale with Planck Data
• Scalars at the Cosmological Collider: Full Shapes of Tree Diagrams and Bispectrum Searches using Planck Data
• Searching for Cosmological Collider in the Planck CMB Data II: collider templates and Modal analysis
• How Significant are Cosmological Collider Signals in the Planck Data?
• Primordial non-Gaussianity constraints on dissipative inflation
• Separating the Inseparable: Constraining Arbitrary Primordial Bispectra with Cosmic Microwave Background Data
• Searching for Cosmological Collider in the Planck CMB Data
• Searching for Unparticles with the Cosmic Microwave Background
• What Shape is the Inflationary Bispectrum?
• First Search for Kaluza-Klein Gravitons and Radion Using Planck Data
• BOSS Constraints on Massive Particles during Inflation: The Cosmological Collider in Action
• Colliding Ghosts: Constraining Inflation with the Parity-Odd Galaxy Four-Point Function
• Light Fields during Inflation from BOSS and Future Galaxy Surveys
• Extending the Cosmological Collider: New Scaling Regimes and Constraints from BOSS
• The Cosmological Flow: A Systematic Approach to Primordial Correlators
• Cosmological Flow of Primordial Correlators
• Shapes of the Cosmological Low-Speed Collider

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