In Search of Large Signals at the Cosmological Collider

We look for oscillating signals in the primordial bispectrum from new physics heavy particles which are visibly large for next generation large scale structures (LSS) survey. We show that in ordinary inflation scenarios where a slow-rolling inflaton generates density fluctuations and with no breakin...

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Bibliographic Details
Published in:arXiv.org 2019-10
Main Authors: Lian-Tao, Wang, Zhong-Zhi Xianyu
Format: Article
Language:English
Subjects:
Chemical potential
Organic chemistry
Scale invariance
Variation
Online Access:Get full text
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Summary:We look for oscillating signals in the primordial bispectrum from new physics heavy particles which are visibly large for next generation large scale structures (LSS) survey. We show that in ordinary inflation scenarios where a slow-rolling inflaton generates density fluctuations and with no breaking of scale invariance or spacetime symmetry, there exist no naturally large signals unless the rolling inflaton generates a parity-odd chemical potential for the heavy particles. We estimate the accessibility of this signal through observations. While current CMB data are already sensitive in the most optimistic scenario, future probes, including LSS survey and 21 cm observation, can cover interesting regions of the model space.
ISSN:2331-8422
DOI:10.48550/arxiv.1910.12876