Blue-tilted primordial gravitational waves from massive gravity

Tomohiro Fujita*, Sachiko Kuroyanagi, Shuntaro Mizuno, Shinji Mukohyama

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


We study a theory of massive tensor gravitons which predicts blue-tilted and largely amplified primordial gravitational waves. After inflation, while their mass is significant until it diminishes to a small value, gravitons are diluted as non-relativistic matter and hence their amplitude can be substantially amplified compared to the massless gravitons which decay as radiation. We show that such gravitational waves can be detected by interferometer experiments, even if their signal is not observed on the CMB scales.

Original languageEnglish
Pages (from-to)215-219
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2019 Feb 10
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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