PreprintCC BY 4.0arXiv
Massive de Sitter Correlators as Finite Mellin-Barnes Integrals
Abstract
Using the Mellin-Barnes representation of de Sitter propagators, we reduce tree-level heavy-particle exchange to finite integrals that converge at physical kinematics on mass-independent contours, and one-loop diagrams to the same integrand times a flat-space momentum factor. We evaluate the triple-exchange bispectrum without analytic continuation and compute the complete one-loop triangle at general mass. These give cosmological collider predictions, the oscillatory signatures of heavy particles during inflation, for multiple exchanges and loops at arbitrary masses.
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BibTeX
@misc{mccune2026massive,
title = {{Massive de Sitter Correlators as Finite Mellin-Barnes Integrals}},
author = {Amara McCune},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.10921},
eprint = {2610.10921},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.10921},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Massive de Sitter Correlators as Finite Mellin-Barnes Integrals
AU - Amara McCune
PY - 2026
DA - 2026/10/07
PB - arXiv
DO - 10.48550/arxiv.2610.10921
UR - https://arxiv.org/abs/2610.10921
AB - Using the Mellin-Barnes representation of de Sitter propagators, we reduce tree-level heavy-particle exchange to finite integrals that converge at physical kinematics on mass-independent contours, and one-loop diagrams to the same integrand times a flat-space momentum factor. We evaluate the triple-exchange bispectrum without analytic continuation and compute the complete one-loop triangle at general mass. These give cosmological collider predictions, the oscillatory signatures of heavy particles during inflation, for multiple exchanges and loops at arbitrary masses.
ER -