Non-gaussianity consistency relation for multifield inflation

Naonori Suma Sugiyama, Eiichiro Komatsu, Toshifumi Futamase

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

While detection of the "local form" bispectrum of primordial perturbations would rule out all single-field inflation models, multifield models would still be allowed. We show that multifield models described by the δN formalism obey an inequality between fNL and one of the local-form trispectrum amplitudes, τNL, such that τNL>12(65fNL)2 with a possible logarithmic scale dependence, provided that 2-loop terms are small. Detection of a violation of this inequality would rule out most of multifield models, challenging inflation as a mechanism for generating the primoridal perturbations.

Original languageEnglish
Article number251301
JournalPhysical Review Letters
Volume106
Issue number25
DOIs
Publication statusPublished - 2011 Jun 24

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Non-gaussianity consistency relation for multifield inflation'. Together they form a unique fingerprint.

  • Cite this