Pith. sign in

REVIEW 5 cited by

Classical Cosmological Collider Physics and Primordial Features

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2205.01107 v2 pith:3EXYRYGW submitted 2022-05-02 hep-ph astro-ph.COgr-qchep-th

Xingang Chen , Reza Ebadi , Soubhik Kumar This is my paper · ORCID
classification hep-phastro-ph.COgr-qchep-th
keywords featuresclassicalprimordialcollidercosmologicalinflationcasecategory
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

Features in the inflationary landscape can inject extra energies to inflation models and produce on-shell particles with masses much larger than the Hubble scale of inflation. This possibility extends the energy reach of the program of cosmological collider physics, in which signals associated with these particles are generically Boltzmann-suppressed. We study the mechanisms of this classical cosmological collider in two categories of primordial features. In the first category, the primordial feature is classical oscillation, which includes the case of coherent oscillation of a massive field and the case of oscillatory features in the inflationary potential. The second category includes any sharp feature in the inflation model. All these classical features can excite unsuppressed quantum modes of other heavy fields which leave observational signatures in primordial non-Gaussianities, including the information about the particle spectra of these heavy degrees of freedom.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Dissecting the Scalar Cosmological Collider with the Cosmic Microwave Background

    astro-ph.CO 2026-07 accept novelty 7.0 of 10

    A joint Bayesian fit of the multi-field inflationary Lagrangian to Planck bispectrum data finds no cosmological collider signal (max Δχ²=5.3) and shows weak-mixing template searches are invalid except at the smallest masses.

  2. First Search for Kaluza-Klein Gravitons and Radion Using Planck Data

    astro-ph.CO 2026-07 accept novelty 7.0 of 10

    First Planck search for radion and KK-graviton bispectra finds no significant non-Gaussianity (max 1.8σ at m_KK ≈ 1.6H), while a warped 5D model can yield f_NL ~ 1–50.

  3. The Exact and Approximate Tales of Boost-Breaking Cosmological Correlators

    hep-th 2025-06 conditional novelty 7.0 of 10

    The tree-level boost-breaking cosmological collider seed correlator is computed exactly for general sound speed and chemical potential, and saddle-point methods turn it into practical elementary-function templates.

  4. Bootstrapping the Cosmological Collider with Resonant Features

    hep-th 2025-05 conditional novelty 7.0 of 10

    Oscillatory couplings with frequency above the heavy field mass remove the Boltzmann suppression of cosmological collider signals and produce new scale-dependent bispectrum shapes, with axion monodromy as a concrete r...

  5. AGILE: an end-to-end Rubin-LSST simulation of AGNs, galaxies, and stars I. Software description and first data release

    astro-ph.GA 2026-03 unverdicted novelty 6.0 of 10

    AGILE builds a 24 deg² truth catalog and a 1 deg² three-year LSST pilot (DR1) to measure flux recovery and Type-1 AGN completeness/purity from color and variability selections.

Pith tools