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General formula for the running of local fNL

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posted on 2023-06-08, 17:25 authored by Christian ByrnesChristian Byrnes, Jinn-Ouk Gong
We 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.

History

Publication status

  • Published

File Version

  • Submitted version

Journal

Physics Letters B

ISSN

0370-2693

Publisher

Elsevier

Issue

3

Volume

718

Page range

718-721

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2014-05-27

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