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General formula for the running of local fNL
journal contribution
posted on 2023-06-08, 17:25 authored by Christian ByrnesChristian Byrnes, Jinn-Ouk GongWe compute the scale dependence of fNL for models of multi-field inflation, allowing for an arbitrary field space metric. We show that, in addition to multi-field effects and self interactions, the curved field space metric provides another source of scale dependence, which arises from the field-space Riemann curvature tensor and its derivatives. The scale dependence may be detectable within the near future if the amplitude of fNL is not too far from the current observational bounds.
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- Published
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- Submitted version
Journal
Physics Letters BISSN
0370-2693Publisher
ElsevierExternal DOI
Issue
3Volume
718Page range
718-721Department affiliated with
- Physics and Astronomy Publications
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- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2014-05-27Usage metrics
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