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Precision calculation of inflation correlators at one loop.
- Source :
-
Journal of High Energy Physics . Feb2022, Vol. 2022 Issue 2, p1-41. 41p. - Publication Year :
- 2022
-
Abstract
- We initiate a systematic study of precision calculation of the inflation correlators at the 1-loop level, starting in this paper with bosonic 1-loop bispectrum with chemical-potential enhancement. Such 1-loop processes could lead to important cosmological collider observables but are notoriously difficult to compute due to the lack of symmetries. We attack the problem from a direct numerical approach based on the real-time Schwinger-Keldysh formalism and show full numerical results for arbitrary kinematics containing both the oscillatory "signals" and the "backgrounds". Our results show that, while the non-oscillatory part can be one to two orders of magnitude larger, the oscillatory signal can be separated out by applying appropriate high-pass filters. We have also compared the result with analytic estimates typically adopted in the literature. While the amplitude is comparable, there is a non-negligible deviation in the frequency of the oscillatory part away from the extreme squeezed limit. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CORRELATORS
*HIGHPASS electric filters
*PRICE inflation
*KINEMATICS
Subjects
Details
- Language :
- English
- ISSN :
- 11266708
- Volume :
- 2022
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of High Energy Physics
- Publication Type :
- Academic Journal
- Accession number :
- 155883882
- Full Text :
- https://doi.org/10.1007/JHEP02(2022)085