From amplitudes to contact cosmological correlators
Publication Date
2021-10-01Journal Title
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Volume
2021
Issue
10
Language
en
Type
Article
This Version
VoR
Metadata
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Bonifacio, J., Pajer, E., & Wang, D. (2021). From amplitudes to contact cosmological correlators. Journal of High Energy Physics, 2021 (10) https://doi.org/10.1007/jhep10(2021)001
Abstract
Abstract: Our understanding of quantum correlators in cosmological spacetimes, including those that we can observe in cosmological surveys, has improved qualitatively in the past few years. Now we know many constraints that these objects must satisfy as consequences of general physical principles, such as symmetries, unitarity and locality. Using this new understanding, we derive the most general scalar four-point correlator, i.e., the trispectrum, to all orders in derivatives for manifestly local contact interactions. To obtain this result we use techniques from commutative algebra to write down all possible scalar four-particle amplitudes without assuming invariance under Lorentz boosts. We then input these amplitudes into a contact reconstruction formula that generates a contact cosmological correlator in de Sitter spacetime from a contact scalar or graviton amplitude. We also show how the same procedure can be used to derive higher-point contact cosmological correlators. Our results further extend the reach of the boostless cosmological bootstrap and build a new connection between flat and curved spacetime physics.
Keywords
Regular Article - Theoretical Physics, Cosmology of Theories beyond the SM, Effective Field Theories
Identifiers
jhep10(2021)001, 16795
External DOI: https://doi.org/10.1007/jhep10(2021)001
This record's URL: https://www.repository.cam.ac.uk/handle/1810/333302
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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