TY - JOUR
T1 - Blue-tilted primordial gravitational waves from massive gravity
AU - Fujita, Tomohiro
AU - Kuroyanagi, Sachiko
AU - Mizuno, Shuntaro
AU - Mukohyama, Shinji
N1 - Funding Information:
We would like to thank Claudia de Rham, Tsutomu Kobayashi, Misao Sasaki, Takahiro Tanaka and Gianmassimo Tasinato for useful comments. In this work, TF is supported by Japan Society for the Promotion of Science (JSPS) Grants-in-Aid for Scientific Research (KAKENHI) No. 17J09103 . SK is supported by JSPS KAKENHI No. 17K14282 and Career Development Project for Researchers of Allied Universities. 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 by WPI, Ministry of Education, Culture, Sports, Science and Technology (MEXT) , Japan.
Publisher Copyright:
© 2018 The Authors
PY - 2019/2/10
Y1 - 2019/2/10
N2 - 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.
AB - 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.
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U2 - 10.1016/j.physletb.2018.12.025
DO - 10.1016/j.physletb.2018.12.025
M3 - Article
AN - SCOPUS:85058690327
SN - 0370-2693
VL - 789
SP - 215
EP - 219
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -