#bispectrum
4 papers · 1 filter
New exact bispectrum shapes in multifield inflation
Lucas Pinol
The paper presents an analytical, non‑perturbative calculation of the primordial bispectrum in multifield inflation, deriving integral representations for mixed curvature‑isocurvat…
Pushing the Primordial Frontier: Cosmological Collider Signatures at Strong Mixing
Javier Huenupi, Claudio Muñoz, Gonzalo A. Palma +1
The paper presents an analytic method to study primordial non‑Gaussianity in multifield inflation that fully accounts for strong curvature‑isocurvature mixing, providing exact bisp…
Density reconstruction from biased tracers: Testing the equivalence principle through consistency relations
Lawrence Dam, Omar Darwish
The paper introduces a quadratic‑estimator method that uses the anti‑symmetric modulation of cross‑power spectra between different biased tracers to test the weak equivalence princ…
The Limitations of Cosmological Collider Analyses
Oliver H. E. Philcox
The paper evaluates how observable the scalar cosmological collider signals are by comparing precise numerical bispectrum predictions with Planck data, showing that weak mixing yie…