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An Effective Cosmological Collider

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arxiv 2401.10976 v1 pith:SQUNY7NJ submitted 2024-01-19 hep-ph astro-ph.COhep-th

Nathaniel Craig , Soubhik Kumar , Amara McCune This is my paper · ORCID
classification hep-phastro-ph.COhep-th
keywords collidercosmologicalcoupledeffectiveeftsfieldheavyinflaton
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Effective field theories (EFTs) of heavy particles coupled to the inflaton are rife with operator redundancies, frequently obscured by sensitivity to both boundary terms and field redefinitions. We initiate a systematic study of these redundancies by establishing a minimal operator basis for an archetypal example, the abelian gauge-Higgs-inflaton EFT. Working up to dimension 9, we show that certain low-dimensional operators are entirely redundant and identify new non-redundant operators with potentially interesting cosmological collider signals. Our methods generalize straightforwardly to other EFTs of heavy particles coupled to the inflaton.

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Cited by 3 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. 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.

  3. 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.

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