PreprintarXiv licencearXiv
Hubble Susceptibility: Beyond Effective-Mass Spectroscopy in the Cosmological Collider
Abstract
In this note, we introduce the Hubble susceptibility of cosmological-collider masses, encoded in the scale dependence of the squeezed-limit oscillation. Heavy fields generically receive Hubble-induced mass corrections during inflation, and we show that the local oscillation frequency and its drift can disentangle such corrections from an intrinsic mass contribution at leading slow-roll and adiabatic order.
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BibTeX
@misc{aoki2026hubble,
title = {{Hubble Susceptibility: Beyond Effective-Mass Spectroscopy in the Cosmological Collider}},
author = {Shuntaro Aoki and Masahide Yamaguchi},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.26014},
eprint = {2610.26014},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.26014},
}
RIS
TY - UNPB
TI - Hubble Susceptibility: Beyond Effective-Mass Spectroscopy in the Cosmological Collider
AU - Shuntaro Aoki
AU - Masahide Yamaguchi
PY - 2026
DA - 2026/10/19
PB - arXiv
DO - 10.48550/arxiv.2610.26014
UR - https://arxiv.org/abs/2610.26014
AB - In this note, we introduce the Hubble susceptibility of cosmological-collider masses, encoded in the scale dependence of the squeezed-limit oscillation. Heavy fields generically receive Hubble-induced mass corrections during inflation, and we show that the local oscillation frequency and its drift can disentangle such corrections from an intrinsic mass contribution at leading slow-roll and adiabatic order.
ER -