TY - JOUR

T1 - General formula for the running of local fNL

AU - Byrnes, Christian T.

AU - Gong, Jinn Ouk

N1 - Funding Information:
We thank Joseph Elliston, Raquel Ribeiro, Misao Sasaki, David Seery and Reza Tavakol for useful discussions. J.G. thanks the Aspen Center for Physics for hospitality, supported in part by the National Science Foundation under Grant No. 1066293 , where part of this work was carried out. C.B. is supported by a Royal Society University Research Fellowship . J.G. is supported in part by a Korean–CERN Fellowship .

PY - 2013/1/8

Y1 - 2013/1/8

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84871611060&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2012.11.052

DO - 10.1016/j.physletb.2012.11.052

M3 - Article

AN - SCOPUS:84871611060

SN - 0370-2693

VL - 718

SP - 718

EP - 721

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3

ER -