Primordial tensor non-gaussianity from massive gravity

Tomohiro Fujita, Shuntaro Mizuno, Shinji Mukohyama

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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
Issue number1
Publication statusPublished - 2020 Jan 8
Externally publishedYes


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

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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