General formula for the running of local fNL

Byrnes, Christian T and Gong, Jinn-Ouk (2013) General formula for the running of local fNL. Physics Letters B, 718 (3). pp. 718-721. ISSN 0370-2693

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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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QB Astronomy > QB0980 Cosmogony. Cosmology
Depositing User: Christian Byrnes
Date Deposited: 27 May 2014 10:35
Last Modified: 02 Jul 2019 20:07

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