@article{aa7888cd22f14ff7825401d8c325056d,
title = "Primordial tensor non-gaussianity from massive gravity",
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.",
keywords = "Inflation, Modified gravity, Primordial gravitational waves (theory)",
author = "Tomohiro Fujita and Shuntaro Mizuno and Shinji Mukohyama",
note = "Funding Information: We would like to thank E. Dimastrogiovanni, P. Creminelli, M. Fasiello, S. Koroyanagi, V. De Luca, G. Franciolini, A. Ricciardone and G. Tasinato for useful discussions. The work of TF was supported by JSPS KAKENHI No. 17J09103 and No. 18K13537. The work of SMi was supported by JSPS KAKENHI No. 16K17709. The work of SMu was supported by JSPS KAKENHI No. 17H02890, No. 17H06359 and also partially supported by the World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan. Publisher Copyright: {\textcopyright} 2020 IOP Publishing Ltd and Sissa Medialab.",
year = "2020",
month = jan,
day = "8",
doi = "10.1088/1475-7516/2020/01/023",
language = "English",
volume = "2020",
journal = "Journal of Cosmology and Astroparticle Physics",
issn = "1475-7516",
publisher = "IOP Publishing Ltd.",
number = "1",
}