Primordial tensor non-gaussianity from massive gravity

Tomohiro Fujita, Shuntaro Mizuno, Shinji Mukohyama

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We calculate tensor bispectrum in a theory of massive tensor gravitons which predicts blue-tilted and largely amplified primordial gravitational waves. We find that a new 3-point interaction can produce a larger tensor bispectrum than the conventional one from general relativity. The bispectrum peaks at the squeezed configuration and its slope towards the squeezed limit is determined by the graviton mass. This squeezed tensor bispectrum may be observed as the quadrupolar modulation of the tensor power spectrum by interferometers.

Original languageEnglish
Article number023
JournalJournal of Cosmology and Astroparticle Physics
Volume2020
Issue number1
DOIs
Publication statusPublished - 2020 Jan 8
Externally publishedYes

Keywords

  • Inflation
  • Modified gravity
  • Primordial gravitational waves (theory)

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Fingerprint

Dive into the research topics of 'Primordial tensor non-gaussianity from massive gravity'. Together they form a unique fingerprint.

Cite this